Articulate and concise. I rebuilt a carb and there was sneezing, needed to back the screw out another 1/2 turn to achieve the correct throttle response from quick twists of the throttle. Thank you
@aronsgarage8343 күн бұрын
I’m glad it was helpful.
@jamesyork599011 күн бұрын
Did you zero angle the protractor base when mounting in vice with an angle finder or level. If not then your final angle of 20 degrees is not correct unless you just got lucky.
@aronsgarage83411 күн бұрын
Yes, I did.
@rebelfromva12 күн бұрын
Yeah they want $400 to check my tc88 tensioners 🤣 and they wonder why the dealership gets a bad name
@aronsgarage83412 күн бұрын
That’s a little steep! Yeah, that’s one of the reasons why I’ve always worked on all of my bikes, never let anyone touch them lol
@dimvicsh13 күн бұрын
I'm from Russia and it's the creat video for HD carb fine tuning.
@aronsgarage83412 күн бұрын
Thanks a lot. I’m glad it’s helpful.
@John-ob7dh18 күн бұрын
Need some advice .My 2003carb fat boy qent in on a dyno to be set up and pass the london ULEZ law ( lowering Nox level ) To do that it seems the bike has to run a bit rich on the mixture. Well it passed and it runs ok and starts and ticks over ,but the plugs are fairly black .The dyno guy says thats ok so long as the bike runs ok .I cant get my head round that as owning bikes and cars since 1958 i always looked for a lighter colour on plugs .Not sure whether to try tuning the mix screw in for a leaner setting .??
@aronsgarage83418 күн бұрын
Yes, it’s supposed to look brown or dark grey. If it’s black, you’ll end up with a lot of carbon build up on the pistons, which is not good. Yes, try to lean it a little with the mixture screw. I made a video on how to fine tune while idling. It might be helpful.
@John-ob7dh20 күн бұрын
My twin cam is running rich ( plugs are black ) Do.i need it re jetting ,or can i simply adjust the mixture screw.? I have a device called a colourtune ( never used it ) it goes in the spark plug hole and on tickover you turn mixture screw till you get a blue flame in the view glass . Have you any experience with this device ,?
@Schwope24 күн бұрын
What thread for the bolts
@aronsgarage83424 күн бұрын
4mm metric
@Schwope24 күн бұрын
@@aronsgarage834 thanks bro I rewatched this and finally got it. Been working on rebuilding my carb and this helped me out so much.
@aronsgarage83424 күн бұрын
I’m pleased it was helpful.
@Schwope24 күн бұрын
The bike I bought had been stored for 7 years took me 3 days to get it to fire finally was able to hear what was going on with it. Everything was upgraded but the carb.
@aronsgarage83424 күн бұрын
These carbs are really well built and work awesome if they are set up properly.
@Ez-P24 күн бұрын
Thank you! I did not have a protractor handy, so I used the measure / level app on the iPhone.
@TheRogueStatus26 күн бұрын
i have a 90 flht with cv40 carb, not original. has evo motor and i am sure it is stock, not sure what exhaust or pipes as i bought it from someone else not running. I am trying to get it running properly without the cough through the carb i know it's running lean cause pipes started getting red after trying to adjust and test the jets. what jets do you think i should try? i also have the easy adjust mixture screw in currently thanks in advance
@aronsgarage83426 күн бұрын
I’d put a 45 slow in there and then adjust mixture screw when warmed up. I think your main is 165 stock. You can leave that in or bump it up to 180 (it won’t hurt)
@badkarma-f3l26 күн бұрын
I had the timken bearing and both bearings went was two rebuilds replaced everything because of the damage but runs good now
@wildman354127 күн бұрын
Great video. I'm having issues since carburetor was rebuilt. Running out of fuel top end & on hills. Thanks again. My channel: Wildman RG3
@aronsgarage83427 күн бұрын
Thank you. In some cases, during rebuild, some people end up installing the needle jet the wrong way around. That could cause issues like that. Or incorrect float level of course.
@donjohn5112Ай бұрын
I have a Yamaha Bolt and holy shit I just wanna say I appreciate you making this video!
@aronsgarage834Ай бұрын
Thanks. Glad it’s helpful for you!
@cylinderhead8047Ай бұрын
Your method here worked like a charm !!! Thanks Ride on
@aronsgarage834Ай бұрын
Glad it did!
@carlbrown6642Ай бұрын
Nice video, thanks.
@paulferrara9079Ай бұрын
The carb bowl has two aluminum raised walls next to the float bowl pin so it can’t come out once installed. 😊
@aronsgarage834Ай бұрын
Very true! Thanks for that 😀
@paulferrara9079Ай бұрын
@@aronsgarage834 No harm in the way you’re securing it. : )
@ilyab9024Ай бұрын
Great video and very informative. I own a 1995 XLH1200 Sportster and I'm about to replace the jet needle to a N65C, however I'm not sure what the stock slow/idle jet size should be from factory. In my official Harley parts catalogue it states part No: 27281-92 but doesn't state the size. Likewise with the main jet, no size given. Can you please advise?
@aronsgarage834Ай бұрын
Thanks for the feedback. I pulled some data, looks like yours had 42 slow and 170-185 main depending on model. I would try 42 and 180 combo, but if you’re over 4 turns out with the mixture screw (when running properly) you might want to bump it up to 45.
@ilyab9024Ай бұрын
Thanks for your response and information. Regarding the needle, do you suggest I use the 3 x 6 x 0.3 shims too and how many? Also, where is the best place to source the jets you mentioned, please?
@aronsgarage834Ай бұрын
I think 2 of those shims would be enough for you. You can get jets from CV Performance (great quality) or genuine Keihin.
@ilyab9024Ай бұрын
Sorry, it should read mixture screw 4 and 3/4 turns out.
@theodavies8754Ай бұрын
The difference in engine running temp at the sweet spot is a lot. ⅒th turn too far in and the pipes will be very hot after 20 minutes cruising. Back out a fraction and the cooling should cope well enough for the cam casing to be no hotter than a very hot drinks cup. Popping on decel is more because you like the idle too low, I like the lope but prefer to be able to use engine braking. At 900 idle hot I get lots of overrun and chugging decel. Set to 1000 and I have to try to get overrun popping. Yes the valve stems are a scary colour with everything set up properly but the plugs tell if it's right or not. Factory setting is too hot is something we can all agree on. Don't run too small main jet for land speed record attempts. Happy days.
@theodavies8754Ай бұрын
Awesome thanks, I picked up a '99 TC 88 made 11/98 so this is a goldmine.
@aronsgarage834Ай бұрын
No problem. Good luck with your upgrade.
@evaneppolite5268Ай бұрын
This tune is great. Thanks for this. No more popping and coughing through the air cleaner. Runs perfect. 2005 88ci
@aronsgarage834Ай бұрын
Glad it worked 👍
@1OlBullАй бұрын
Great job on the 3 videos!
@aronsgarage834Ай бұрын
Thanks! It was a lot of work filming the whole thing, but was all worth it.
@OzninjaguyАй бұрын
I'm thinking of getting an 883 Superlow for tooling around town. Do you know of anyone who did this procedure on an 883, and if so, how did it sound?
@aronsgarage834Ай бұрын
Yeah I do. One of my friends had it. Sounded great, pretty much the same as on the Dyna. My only problem is that idle is really quiet, so I’ve since gone back to my Screaming Eagle with lollipops installed of course. But if I was to go on a long trip/touring, I’d put them back on.
@OzninjaguyАй бұрын
@@aronsgarage834 Thanks for the reply.
@RoberoidifyАй бұрын
Nice! Many thanks for info! 🥰
@aronsgarage834Ай бұрын
Welcome:)
@rubythespotАй бұрын
where does the carburetor overflow hose go after leaving the back of the carburetor?
@HelloHello-um8hmАй бұрын
Route wherever you want
@joshua-xn7wtАй бұрын
This video is cool AF bro thank you
@aronsgarage834Ай бұрын
Glad, it’s helpful
@trevorluxton2455Ай бұрын
Great video, curious as to whether or not this setup would be optimal with a screamin eagle 95 kit and 203 cams?
@aronsgarage834Ай бұрын
Thanks. I’m sure you’d need a bit more juice, bigger jets, needle maybe lifted even more. I’ve never experimented with that so I’m only guessing though.
@jamessouthworth1699Ай бұрын
I have a twin cam 88 and these are the reasons why Harley has no right to call themselves a premium motorcycle. Charging the premium price without providing the premium parts does not make you a premium motorcycle. Yes I have corrected all these issues as well as issues with the chassis. But now that I know how Harley runs their shop I would never buy a new one. I'm even hesitant to buy a used one again unless it's an EVO Sportster.
@aronsgarage834Ай бұрын
I hear you. Definitely a bulletproof Sportster, it’s on my list too..
@johnriley8314Ай бұрын
...I used to own a 1986 Sportster,first year of the EVO motor....AND YES...BULLETPROOF BASICALLY !!!! Loved the 1200 Kit I put in too....LMAO 🤣.....Miss that Ol Sporty....but wanted Bigger Ride !!! LOVE DYNA'S and Softails!!!
@aronsgarage834Ай бұрын
I can imagine! Yeah, I love my Dyna too!!
@michelleduke57662 ай бұрын
Exactly what I needed to no . Best video about throttle cables! Ty
@aronsgarage8342 ай бұрын
Thanks!
@michaelslawinski64492 ай бұрын
hi Aron, i am really glad to have followed your hint and replaced those bolts. Got stuck on the road since the pilot jet got blocked. Very easy job with the hex bolts. BTW, my build is finally done, ended up with engine overhaul. Replaced almost everything on the bike incl. wheeel bearings ( it was a pain in the ass, i tell you ) and also converted the spoked wheels to tubeless. You have been a great influncer, thank you for your kind support and for sharing your knowledge!
@aronsgarage8342 ай бұрын
Hey Michael, Sounds like you’ve done a great job! Feels so great when you work on your own bike. Yeah, so much easier with the allen screws in case you need to drop the float bowl on the side of the road. I also had to do it once. And thanks for your positive feedback!
@9Dark-Warrior62 ай бұрын
Excellent video, gives all the info needed without any unnecessary fluff. Thank you
@aronsgarage8342 ай бұрын
Appreciate it.
@9Dark-Warrior62 ай бұрын
In all the years I have worked on carbs I never knew this. Thank you
@loveyourpitbull2 ай бұрын
Bump your pilot up one.
@aronsgarage8342 ай бұрын
Tried years ago. Was too rich.
@TyRogers012 ай бұрын
I just rode my 99 EG 2200 miles from IN to CA with 95 big bore kit. It ran great for the entire trip until I got to CA. It now backfires through the carb. I replaced the 3 gaskets on the intake. It did not help. Could it simply need to be tuned for the elevation here? Where do I start? Mixture screw? Slow jet? TIA
@aronsgarage8342 ай бұрын
Is it backfiring more while warming up from cold start up or more like when it’s fully warmed up?
@kocevargregorАй бұрын
@@aronsgarage834 mine 97 Evo road king is doing the same thing while warming up from cold engine start on 45 pilot and 180 main with sportster 88 " mid rich" needle, Big sucker air filter and V&H pipes. When engine is wormed up, runs quite ok 99% - accational carb bacfire. I did tried 48 pilot and spark plugs were to black running rich but did run much better when engine was cold and quite sluggish when engine was hot. Im constantly checking every time for intake leak with propane gas and brake cleaner but nothing to be certain for leak - i did changed the seals and new intake flanges. Maybe its an Evo warming up thing, since beeing my first evo...earlier i had 2000 TC 88 dyna never behaved like that while warming up. every time
@aronsgarage834Ай бұрын
Yeah 48 is too big even for TC88. How many turns out is your mixture screw at?
@kocevargregorАй бұрын
@@aronsgarage834 My thought to. using 45 and warm bike sputters on idle when 1/2 turn out so i have mixture screw on 3-3,5 turns out for now. after that is no efect at all or even worse - slugish on idle and acceleration. Becouse of that fact i would maybe try even 44 if i had it- afcourse expecting worse carb bacfire until engine is warmed up. When using pilot 48 i had 1,5-2,5 turns out but bike rans even with screw fully in without any efect on sputtering so i figured that 48 got to be to much becouse of that, thats why i insist trying with 45 and suspecting on some air leaks but cant find them. maybe 46 would be the magic number heheheh when i had TC88 dyna y2000 sparks looked totaly diferent and much more healthier , thats why im insisting in trying to achive that .... Something crossed my mind this moment - float setup? i do have it maybe a little on the rich side, couse i remember of trying to compensate or eliminate cold backfire with some "rich" fuel height in bowl ... do you think maybe the float hight couses rich efect on sparks - maybe efecting on emuslion tube and atomization of fuel in without wanted efect on backfire? damn, this is science heheh... maybe i should of get my masters from HD and carbs not chemistry hehehehehehehhe
@TyRogers01Ай бұрын
I left the 195 but went to a 50. Cleaned the carb and it ran better with no backfiring for a few hundred miles again. Mixture screw is 1.5. Now it is leaking out through the plunger boot so I am going to replace the float needle and accelerator pump diaphragm. I set the float at the correct position on the bench at 15degrees. To me none of this makes sense if it was running perfect for 2200 miles and then all of a sudden it starts back firing. Nothing internally changed so it must be a leak but no leaks. Similar elevation as IN but way less humidity. I am at a loss!!!!
@customgaragemoto75902 ай бұрын
👍👍👍👍👍👍👍
@TheJatojr2 ай бұрын
Thanks for the tapping and pulling tip. Worked perfectly! Didn’t have metric so I did 1/4 20. I froze brass piece and heated body with heat gun and it went together easy.
@aronsgarage8342 ай бұрын
Great job! 👍
@brianvaldez91532 ай бұрын
This video helped me so much, very detailed walkthrough. I appreciate the step by step. 👍
@aronsgarage8342 ай бұрын
I’m glad it was helpful 👍
@christophercercone2 ай бұрын
Hay man thanks this is great, can you write here how to know if it’s rich or lean. ? What you are saying at the end of the video? I think that’s super important
@aronsgarage8342 ай бұрын
Yes, sure. If lean you’ll have a lot of popping on decel, and if you blip the throttle it won’t drop properly (hangs a bit). Also, after a cold start it will take ages to get it to idle without stalling, rough idling, spark plugs will be very light greyish. If rich, performance will drop once properly warmed up (it’ll be sluggish), black plugs, may smell unburned fuel when idling,
@ManpackedPOV2 ай бұрын
Amazing and easy explanation. Thanks alot!
@aronsgarage8342 ай бұрын
Appreciate the feedback!
@hazepennington93032 ай бұрын
Great info I have to do this because I have some noise,, thank you very much for the video..💯
@aronsgarage8342 ай бұрын
Absolutely. Let me know what you find in there. Hopefully nothing serious.. 🤞
@theodavies87543 ай бұрын
Wouldn't be surprised if the fuel in the oil from blow by trashes the plastic. Seen videos of 3 turns out and up the idle jet. If you can smell unburned fuel on the dipstick it's not good.
@user-ox8qx1yi4t3 ай бұрын
The best
@aronsgarage8343 ай бұрын
Thanks
@motsigman3 ай бұрын
29000 mine was worn out/breaking up
@zeldaoftime3 ай бұрын
Good afternoon, I am the owner of a 2006 Sportster 1200 Custom Harley. The carburetor is stock, it has never been opened, I replaced my bike with vance and hines exhausts and a K&N high flow filter in its original cover, only the filter is a K&N brand. My bike feels slow and gives me very few kilometers per liter in the city. I have heard that I have to change the low and high jets, change it to the size 46 and 185, what do you recommend friend? Thx for all your vids
@aronsgarage8343 ай бұрын
Hi there, you don’t need to change your jets. What you could do though, is giving your carb a good clean inside, check float level etc. new gaskets, and fine tune it with your mixture screw. Worth checking your spark plugs as well.
@zeldaoftime3 ай бұрын
@@aronsgarage834 I'l do!!! thx bro
@aronsgarage8343 ай бұрын
No probs, brother:)
@Forever1wheel3 ай бұрын
Great video!
@aronsgarage8343 ай бұрын
Thanks!
@kerivam1233 ай бұрын
All I can say is you're one seriously lucky person. I have a 1998 gsx750f with a seized mixture screw. I attempted to use a bolt extractor after a week of soaking in penetrating fluid. I used the exact same kit as you and it simply would not bite the soft metal of the mixture screw, it simply chewed the remains of the screw up. Not wanting to compromise the threads, I ended up scratching away at the remnants of the screw (with a small flat head screwdriver) until there was just the threads left, with brass still stuck in them. Now I'm trying to find an appropriate tap to run through the threads before I fit a new screw, I'm having a hard time measuring the thread pitch though with it being so fine.
@aronsgarage8343 ай бұрын
Yeah, I might have gotten lucky! Just measured mine for you. It’s a M6 fine 0.75 pitch. Not sure if yours is the same but if it’s a Keihin, it’s like to be. Hope it helps.
@stephenlangley61013 ай бұрын
Thanks. M6x0.5 on mine, they're mikuni. Hopefully I can save the thread or I'll have to make an insert 😬
@aronsgarage8343 ай бұрын
Good luck! 🤞
@susandavis58333 ай бұрын
Thanks for your reply. My bike is actually a 96 fatboy with evo. Hi Flo air and thunderheader exhaust. I let it sit too long and it was cheaper to put new after market carb on. Original jets were 45 and 175? With stock needle new carb was same. Bike ran great when I bought it. However it doesn't run as good now. Thanks again for info. Really helps newbies like me.
@aronsgarage8343 ай бұрын
No problem. I’m glad the videos are useful. One thing with these Harley carbs is that it’s always best to refurbish your original Keihin carb. No aftermarket replicas can beat them.
@user-cj2ij4om4o3 ай бұрын
How do I now it's in the right place
@aronsgarage8343 ай бұрын
When you get it to the spot where it’s idling smooth with the highest rpm. Blip the throttle should drop back down easily. If it hangs a bit, too lean. If it drops quickly below your idle and then slowly recovers to the right rpm, too rich. Other than that, test ride it. Check how it responds, rides cold/warmed up and make further fine adjustments 1/4 turn each time until feels/ rides perfectly.
@user-cj2ij4om4o3 ай бұрын
I just put back in the carburetor it had redone I got it all in and I reved it avd it choked out
@user-cj2ij4om4o3 ай бұрын
@@aronsgarage834 ok thanks
@clinamenaudio89713 ай бұрын
Good video! Can I use a M6 metric threaded screw for pull out the old bronze inlet? The difference with 1/4 " is very small :)
@aronsgarage8343 ай бұрын
Yes, of course. They both work :)
@rickvia84353 ай бұрын
I'm rebuilding my CV for a 2001 Dyna. Before I got it, this bike had literally been sitting out in the weather since 2004 or so. The carb was completely gummed (it ran however - with the float valve stuck wide open - lucky I didn't burn it to the ground). I tore it completely down and cleaned it thoroughly. The low-speed needle levels at 1-3/4. I'm waiting on the kit to see how the new needle measures up. Thanks for this great work.
@aronsgarage8343 ай бұрын
No problem. Good luck with your project.
@susandavis58333 ай бұрын
Question: when I turned mine all the way in it seemed to make no difference. I thought it should cut fuel. Spark plugs looked rich (not sure though iridium) I down sized to 42 pilot jet. Had stock 45. Haven't tried to tune again yet due to fixing oil leak but will it be too lean?
@aronsgarage8343 ай бұрын
Assuming yours is also a Twincam 88, 45 slow (stock from 2000) should work nicely, allowing you to tune it perfectly to a set of open pipes and high flow air cleaner. 42 pilot jet which was in the 1999 models only is too small). If it didn’t stall turning it all the way in, then it would be worth taking a look at your pilot screw. (Maybe the tip is damaged or someone enlarged the hole), check your float height (level might be too high so extra raw fuel is coming through), check your jet needle (it might have been replaced to a high performance one with notches).
@rickvia84353 ай бұрын
@@susandavis5833 Update on my end. I received the rebuild kit and have the carb back on. I also can't get the engine to quit by fully seating the pilot needle. Also, it does NOT want to accelerate and dies unless I pump the throttle.
@EarlGuyton4253 ай бұрын
When are people going to figure out that you can remove those tensioners and run these engines without them. The engineers that designed these gears and that chain measurement never intended for some tensioner to be used on the non tension side of those chains. The tensioners was created by sales marketing competition to get rid of the sonic hum. I removed all my tensioners on my early 2000,s 88 TC engines and they do well
@aronsgarage8343 ай бұрын
Timing chains need to have tensioners. Not only do they control timing stability, but they also improve resistance to wear. Yes, you might be able to run your bike without the tensioners for a while, but your chain and sprockets will wear out much faster due to the slack (tensioners absorb shock and vibration as well), and eventually it can jump having the piston and valves collide with each other.
@EarlGuyton4253 ай бұрын
@@aronsgarage834 Muted
@davidbrannan9873 ай бұрын
Sooooo…you should be able to use a 2001 up cam cover without the wire hanging out of it on this with no trouble to clean things up correct?
@aronsgarage8343 ай бұрын
Yes of course. You can use your old one, too. You just need to pull the wires into that cavity behind the small timing cover. I just did that actually, so it’s all cleaned up properly.
Пікірлер
Articulate and concise. I rebuilt a carb and there was sneezing, needed to back the screw out another 1/2 turn to achieve the correct throttle response from quick twists of the throttle. Thank you
I’m glad it was helpful.
Did you zero angle the protractor base when mounting in vice with an angle finder or level. If not then your final angle of 20 degrees is not correct unless you just got lucky.
Yes, I did.
Yeah they want $400 to check my tc88 tensioners 🤣 and they wonder why the dealership gets a bad name
That’s a little steep! Yeah, that’s one of the reasons why I’ve always worked on all of my bikes, never let anyone touch them lol
I'm from Russia and it's the creat video for HD carb fine tuning.
Thanks a lot. I’m glad it’s helpful.
Need some advice .My 2003carb fat boy qent in on a dyno to be set up and pass the london ULEZ law ( lowering Nox level ) To do that it seems the bike has to run a bit rich on the mixture. Well it passed and it runs ok and starts and ticks over ,but the plugs are fairly black .The dyno guy says thats ok so long as the bike runs ok .I cant get my head round that as owning bikes and cars since 1958 i always looked for a lighter colour on plugs .Not sure whether to try tuning the mix screw in for a leaner setting .??
Yes, it’s supposed to look brown or dark grey. If it’s black, you’ll end up with a lot of carbon build up on the pistons, which is not good. Yes, try to lean it a little with the mixture screw. I made a video on how to fine tune while idling. It might be helpful.
My twin cam is running rich ( plugs are black ) Do.i need it re jetting ,or can i simply adjust the mixture screw.? I have a device called a colourtune ( never used it ) it goes in the spark plug hole and on tickover you turn mixture screw till you get a blue flame in the view glass . Have you any experience with this device ,?
What thread for the bolts
4mm metric
@@aronsgarage834 thanks bro I rewatched this and finally got it. Been working on rebuilding my carb and this helped me out so much.
I’m pleased it was helpful.
The bike I bought had been stored for 7 years took me 3 days to get it to fire finally was able to hear what was going on with it. Everything was upgraded but the carb.
These carbs are really well built and work awesome if they are set up properly.
Thank you! I did not have a protractor handy, so I used the measure / level app on the iPhone.
i have a 90 flht with cv40 carb, not original. has evo motor and i am sure it is stock, not sure what exhaust or pipes as i bought it from someone else not running. I am trying to get it running properly without the cough through the carb i know it's running lean cause pipes started getting red after trying to adjust and test the jets. what jets do you think i should try? i also have the easy adjust mixture screw in currently thanks in advance
I’d put a 45 slow in there and then adjust mixture screw when warmed up. I think your main is 165 stock. You can leave that in or bump it up to 180 (it won’t hurt)
I had the timken bearing and both bearings went was two rebuilds replaced everything because of the damage but runs good now
Great video. I'm having issues since carburetor was rebuilt. Running out of fuel top end & on hills. Thanks again. My channel: Wildman RG3
Thank you. In some cases, during rebuild, some people end up installing the needle jet the wrong way around. That could cause issues like that. Or incorrect float level of course.
I have a Yamaha Bolt and holy shit I just wanna say I appreciate you making this video!
Thanks. Glad it’s helpful for you!
Your method here worked like a charm !!! Thanks Ride on
Glad it did!
Nice video, thanks.
The carb bowl has two aluminum raised walls next to the float bowl pin so it can’t come out once installed. 😊
Very true! Thanks for that 😀
@@aronsgarage834 No harm in the way you’re securing it. : )
Great video and very informative. I own a 1995 XLH1200 Sportster and I'm about to replace the jet needle to a N65C, however I'm not sure what the stock slow/idle jet size should be from factory. In my official Harley parts catalogue it states part No: 27281-92 but doesn't state the size. Likewise with the main jet, no size given. Can you please advise?
Thanks for the feedback. I pulled some data, looks like yours had 42 slow and 170-185 main depending on model. I would try 42 and 180 combo, but if you’re over 4 turns out with the mixture screw (when running properly) you might want to bump it up to 45.
Thanks for your response and information. Regarding the needle, do you suggest I use the 3 x 6 x 0.3 shims too and how many? Also, where is the best place to source the jets you mentioned, please?
I think 2 of those shims would be enough for you. You can get jets from CV Performance (great quality) or genuine Keihin.
Sorry, it should read mixture screw 4 and 3/4 turns out.
The difference in engine running temp at the sweet spot is a lot. ⅒th turn too far in and the pipes will be very hot after 20 minutes cruising. Back out a fraction and the cooling should cope well enough for the cam casing to be no hotter than a very hot drinks cup. Popping on decel is more because you like the idle too low, I like the lope but prefer to be able to use engine braking. At 900 idle hot I get lots of overrun and chugging decel. Set to 1000 and I have to try to get overrun popping. Yes the valve stems are a scary colour with everything set up properly but the plugs tell if it's right or not. Factory setting is too hot is something we can all agree on. Don't run too small main jet for land speed record attempts. Happy days.
Awesome thanks, I picked up a '99 TC 88 made 11/98 so this is a goldmine.
No problem. Good luck with your upgrade.
This tune is great. Thanks for this. No more popping and coughing through the air cleaner. Runs perfect. 2005 88ci
Glad it worked 👍
Great job on the 3 videos!
Thanks! It was a lot of work filming the whole thing, but was all worth it.
I'm thinking of getting an 883 Superlow for tooling around town. Do you know of anyone who did this procedure on an 883, and if so, how did it sound?
Yeah I do. One of my friends had it. Sounded great, pretty much the same as on the Dyna. My only problem is that idle is really quiet, so I’ve since gone back to my Screaming Eagle with lollipops installed of course. But if I was to go on a long trip/touring, I’d put them back on.
@@aronsgarage834 Thanks for the reply.
Nice! Many thanks for info! 🥰
Welcome:)
where does the carburetor overflow hose go after leaving the back of the carburetor?
Route wherever you want
This video is cool AF bro thank you
Glad, it’s helpful
Great video, curious as to whether or not this setup would be optimal with a screamin eagle 95 kit and 203 cams?
Thanks. I’m sure you’d need a bit more juice, bigger jets, needle maybe lifted even more. I’ve never experimented with that so I’m only guessing though.
I have a twin cam 88 and these are the reasons why Harley has no right to call themselves a premium motorcycle. Charging the premium price without providing the premium parts does not make you a premium motorcycle. Yes I have corrected all these issues as well as issues with the chassis. But now that I know how Harley runs their shop I would never buy a new one. I'm even hesitant to buy a used one again unless it's an EVO Sportster.
I hear you. Definitely a bulletproof Sportster, it’s on my list too..
...I used to own a 1986 Sportster,first year of the EVO motor....AND YES...BULLETPROOF BASICALLY !!!! Loved the 1200 Kit I put in too....LMAO 🤣.....Miss that Ol Sporty....but wanted Bigger Ride !!! LOVE DYNA'S and Softails!!!
I can imagine! Yeah, I love my Dyna too!!
Exactly what I needed to no . Best video about throttle cables! Ty
Thanks!
hi Aron, i am really glad to have followed your hint and replaced those bolts. Got stuck on the road since the pilot jet got blocked. Very easy job with the hex bolts. BTW, my build is finally done, ended up with engine overhaul. Replaced almost everything on the bike incl. wheeel bearings ( it was a pain in the ass, i tell you ) and also converted the spoked wheels to tubeless. You have been a great influncer, thank you for your kind support and for sharing your knowledge!
Hey Michael, Sounds like you’ve done a great job! Feels so great when you work on your own bike. Yeah, so much easier with the allen screws in case you need to drop the float bowl on the side of the road. I also had to do it once. And thanks for your positive feedback!
Excellent video, gives all the info needed without any unnecessary fluff. Thank you
Appreciate it.
In all the years I have worked on carbs I never knew this. Thank you
Bump your pilot up one.
Tried years ago. Was too rich.
I just rode my 99 EG 2200 miles from IN to CA with 95 big bore kit. It ran great for the entire trip until I got to CA. It now backfires through the carb. I replaced the 3 gaskets on the intake. It did not help. Could it simply need to be tuned for the elevation here? Where do I start? Mixture screw? Slow jet? TIA
Is it backfiring more while warming up from cold start up or more like when it’s fully warmed up?
@@aronsgarage834 mine 97 Evo road king is doing the same thing while warming up from cold engine start on 45 pilot and 180 main with sportster 88 " mid rich" needle, Big sucker air filter and V&H pipes. When engine is wormed up, runs quite ok 99% - accational carb bacfire. I did tried 48 pilot and spark plugs were to black running rich but did run much better when engine was cold and quite sluggish when engine was hot. Im constantly checking every time for intake leak with propane gas and brake cleaner but nothing to be certain for leak - i did changed the seals and new intake flanges. Maybe its an Evo warming up thing, since beeing my first evo...earlier i had 2000 TC 88 dyna never behaved like that while warming up. every time
Yeah 48 is too big even for TC88. How many turns out is your mixture screw at?
@@aronsgarage834 My thought to. using 45 and warm bike sputters on idle when 1/2 turn out so i have mixture screw on 3-3,5 turns out for now. after that is no efect at all or even worse - slugish on idle and acceleration. Becouse of that fact i would maybe try even 44 if i had it- afcourse expecting worse carb bacfire until engine is warmed up. When using pilot 48 i had 1,5-2,5 turns out but bike rans even with screw fully in without any efect on sputtering so i figured that 48 got to be to much becouse of that, thats why i insist trying with 45 and suspecting on some air leaks but cant find them. maybe 46 would be the magic number heheheh when i had TC88 dyna y2000 sparks looked totaly diferent and much more healthier , thats why im insisting in trying to achive that .... Something crossed my mind this moment - float setup? i do have it maybe a little on the rich side, couse i remember of trying to compensate or eliminate cold backfire with some "rich" fuel height in bowl ... do you think maybe the float hight couses rich efect on sparks - maybe efecting on emuslion tube and atomization of fuel in without wanted efect on backfire? damn, this is science heheh... maybe i should of get my masters from HD and carbs not chemistry hehehehehehehhe
I left the 195 but went to a 50. Cleaned the carb and it ran better with no backfiring for a few hundred miles again. Mixture screw is 1.5. Now it is leaking out through the plunger boot so I am going to replace the float needle and accelerator pump diaphragm. I set the float at the correct position on the bench at 15degrees. To me none of this makes sense if it was running perfect for 2200 miles and then all of a sudden it starts back firing. Nothing internally changed so it must be a leak but no leaks. Similar elevation as IN but way less humidity. I am at a loss!!!!
👍👍👍👍👍👍👍
Thanks for the tapping and pulling tip. Worked perfectly! Didn’t have metric so I did 1/4 20. I froze brass piece and heated body with heat gun and it went together easy.
Great job! 👍
This video helped me so much, very detailed walkthrough. I appreciate the step by step. 👍
I’m glad it was helpful 👍
Hay man thanks this is great, can you write here how to know if it’s rich or lean. ? What you are saying at the end of the video? I think that’s super important
Yes, sure. If lean you’ll have a lot of popping on decel, and if you blip the throttle it won’t drop properly (hangs a bit). Also, after a cold start it will take ages to get it to idle without stalling, rough idling, spark plugs will be very light greyish. If rich, performance will drop once properly warmed up (it’ll be sluggish), black plugs, may smell unburned fuel when idling,
Amazing and easy explanation. Thanks alot!
Appreciate the feedback!
Great info I have to do this because I have some noise,, thank you very much for the video..💯
Absolutely. Let me know what you find in there. Hopefully nothing serious.. 🤞
Wouldn't be surprised if the fuel in the oil from blow by trashes the plastic. Seen videos of 3 turns out and up the idle jet. If you can smell unburned fuel on the dipstick it's not good.
The best
Thanks
29000 mine was worn out/breaking up
Good afternoon, I am the owner of a 2006 Sportster 1200 Custom Harley. The carburetor is stock, it has never been opened, I replaced my bike with vance and hines exhausts and a K&N high flow filter in its original cover, only the filter is a K&N brand. My bike feels slow and gives me very few kilometers per liter in the city. I have heard that I have to change the low and high jets, change it to the size 46 and 185, what do you recommend friend? Thx for all your vids
Hi there, you don’t need to change your jets. What you could do though, is giving your carb a good clean inside, check float level etc. new gaskets, and fine tune it with your mixture screw. Worth checking your spark plugs as well.
@@aronsgarage834 I'l do!!! thx bro
No probs, brother:)
Great video!
Thanks!
All I can say is you're one seriously lucky person. I have a 1998 gsx750f with a seized mixture screw. I attempted to use a bolt extractor after a week of soaking in penetrating fluid. I used the exact same kit as you and it simply would not bite the soft metal of the mixture screw, it simply chewed the remains of the screw up. Not wanting to compromise the threads, I ended up scratching away at the remnants of the screw (with a small flat head screwdriver) until there was just the threads left, with brass still stuck in them. Now I'm trying to find an appropriate tap to run through the threads before I fit a new screw, I'm having a hard time measuring the thread pitch though with it being so fine.
Yeah, I might have gotten lucky! Just measured mine for you. It’s a M6 fine 0.75 pitch. Not sure if yours is the same but if it’s a Keihin, it’s like to be. Hope it helps.
Thanks. M6x0.5 on mine, they're mikuni. Hopefully I can save the thread or I'll have to make an insert 😬
Good luck! 🤞
Thanks for your reply. My bike is actually a 96 fatboy with evo. Hi Flo air and thunderheader exhaust. I let it sit too long and it was cheaper to put new after market carb on. Original jets were 45 and 175? With stock needle new carb was same. Bike ran great when I bought it. However it doesn't run as good now. Thanks again for info. Really helps newbies like me.
No problem. I’m glad the videos are useful. One thing with these Harley carbs is that it’s always best to refurbish your original Keihin carb. No aftermarket replicas can beat them.
How do I now it's in the right place
When you get it to the spot where it’s idling smooth with the highest rpm. Blip the throttle should drop back down easily. If it hangs a bit, too lean. If it drops quickly below your idle and then slowly recovers to the right rpm, too rich. Other than that, test ride it. Check how it responds, rides cold/warmed up and make further fine adjustments 1/4 turn each time until feels/ rides perfectly.
I just put back in the carburetor it had redone I got it all in and I reved it avd it choked out
@@aronsgarage834 ok thanks
Good video! Can I use a M6 metric threaded screw for pull out the old bronze inlet? The difference with 1/4 " is very small :)
Yes, of course. They both work :)
I'm rebuilding my CV for a 2001 Dyna. Before I got it, this bike had literally been sitting out in the weather since 2004 or so. The carb was completely gummed (it ran however - with the float valve stuck wide open - lucky I didn't burn it to the ground). I tore it completely down and cleaned it thoroughly. The low-speed needle levels at 1-3/4. I'm waiting on the kit to see how the new needle measures up. Thanks for this great work.
No problem. Good luck with your project.
Question: when I turned mine all the way in it seemed to make no difference. I thought it should cut fuel. Spark plugs looked rich (not sure though iridium) I down sized to 42 pilot jet. Had stock 45. Haven't tried to tune again yet due to fixing oil leak but will it be too lean?
Assuming yours is also a Twincam 88, 45 slow (stock from 2000) should work nicely, allowing you to tune it perfectly to a set of open pipes and high flow air cleaner. 42 pilot jet which was in the 1999 models only is too small). If it didn’t stall turning it all the way in, then it would be worth taking a look at your pilot screw. (Maybe the tip is damaged or someone enlarged the hole), check your float height (level might be too high so extra raw fuel is coming through), check your jet needle (it might have been replaced to a high performance one with notches).
@@susandavis5833 Update on my end. I received the rebuild kit and have the carb back on. I also can't get the engine to quit by fully seating the pilot needle. Also, it does NOT want to accelerate and dies unless I pump the throttle.
When are people going to figure out that you can remove those tensioners and run these engines without them. The engineers that designed these gears and that chain measurement never intended for some tensioner to be used on the non tension side of those chains. The tensioners was created by sales marketing competition to get rid of the sonic hum. I removed all my tensioners on my early 2000,s 88 TC engines and they do well
Timing chains need to have tensioners. Not only do they control timing stability, but they also improve resistance to wear. Yes, you might be able to run your bike without the tensioners for a while, but your chain and sprockets will wear out much faster due to the slack (tensioners absorb shock and vibration as well), and eventually it can jump having the piston and valves collide with each other.
@@aronsgarage834 Muted
Sooooo…you should be able to use a 2001 up cam cover without the wire hanging out of it on this with no trouble to clean things up correct?
Yes of course. You can use your old one, too. You just need to pull the wires into that cavity behind the small timing cover. I just did that actually, so it’s all cleaned up properly.
Awesome