How to Balance Motorcycle Carbs

Автокөліктер мен көлік құралдары

I am going to show you how to mahe $5 motorcycle carburetor synchronizer, and see how well it works at balancing a set of motorcycle carbs on a 1980 Honda CM400.

Пікірлер: 199

  • @cri8tor
    @cri8tor5 жыл бұрын

    Over six-years old and still totally relevant. Cheers

  • @mcdonaldchris86
    @mcdonaldchris8610 жыл бұрын

    Thanks bro!!! You just saved me 70 bucks, and gave me a good reason to pickup a 12 pack.

  • @DrLelantos

    @DrLelantos

    10 жыл бұрын

    Just in case you break 10 of the bottles trying to make it right ;]

  • @brf001
    @brf00111 жыл бұрын

    You continue to amaze me with your clear understanding of mechanical devices and your ability to simplify them for those who don't. Good work!

  • @genecurl6284
    @genecurl62844 жыл бұрын

    Glad I found your video. The vacuum tester Kawasaki recommends is $1,322.00 and I only paid $1000.00 for my bike, so. . . .

  • @joebananas4741
    @joebananas47418 жыл бұрын

    Great idea, seems more accurate than the commercial balancers. I don't drink so I will have to find some bottles from somewhere.

  • @rikdol
    @rikdol2 жыл бұрын

    Omg thanks!! I know it’s an older video but for any 2 carb setups this is pure gold. Was fiddling around with a hose filled partly with oil. Watching the levels rise to fast oil in engine aargh. This will make it much clearer!

  • @mikelachance2058
    @mikelachance20588 жыл бұрын

    I just synched my carbs on my 1980 Honda CX500. I'd never done it before and was nervous about it. Used your method and they synched up perfectly. Thanks for posting.

  • @adrianc4712

    @adrianc4712

    7 жыл бұрын

    cool! i have a 1978 cx500 and was also kind of nervous about this but after seeing your comment i will try this this weekend

  • @aaronraynor8785

    @aaronraynor8785

    7 жыл бұрын

    good to hear I'm not the only one that's nervous. ill try this on the weekend.

  • @danielkenway2413

    @danielkenway2413

    6 жыл бұрын

    Did the tubes fit right into the sync port or did you need an adapter? I have 1980cm400a so what worked for you I'm assuming will work for me lol

  • @scottjones5455

    @scottjones5455

    5 жыл бұрын

    I too have a 1980 cx500. It's about to turn 20k miles. The original owner must have kept it in the garage because it is in top shape. The guy I bought it from was the second owner. He knew nothing about maintenance and had just had the valves adjusted and carbs rebuilt so I'm probably good to go for a while, but when it starts running rough, I'll know what to do. Great video.

  • @Bwalt1
    @Bwalt18 жыл бұрын

    You did a good job at explaining, btw the level difference in each bottle does not matter as long as if It does not move.

  • @lmdetect

    @lmdetect

    8 жыл бұрын

    Exactly.

  • @ELCLAVE300

    @ELCLAVE300

    3 жыл бұрын

    I did this and one bottle goes completely empty.

  • @nightsongs
    @nightsongs5 жыл бұрын

    For someone who is new to motorcycles, and likes a visual representation of the effects actions have other than a needle on a gauge this is awesome!

  • @alextupou4992
    @alextupou49927 жыл бұрын

    Brilliant! CW and CCW.... rubber stops in the freezer. ...heard the sound difference. ..excellent video man.

  • @paulbarnett5818
    @paulbarnett58189 жыл бұрын

    awesome video, I have done a similar thing, but I used auto transmission fluid as it is an oil and if for any reason it got pulled into the bike it would be okay, oil good...water bad, I also found that the auto trans fluid was less jumpy in the container and showed more accuracy than water. used very successfully on a '96 XV1100S Virago. Paul.

  • @lynxonwatch
    @lynxonwatch6 жыл бұрын

    Thanks a lot, just built my sync tool following your idea, and it worked great. Honda Transalp XL650V now purring like a big cat...too bad it's winter time here ;).

  • @SprayIgniteBoom
    @SprayIgniteBoom6 жыл бұрын

    that is freaking ingenuous!!! You are why this platform exists. Sharing useful simple daily tips. Good job!!!🖖👌🍫

  • @osmoregulatoryorgan
    @osmoregulatoryorgan7 жыл бұрын

    That's probably one of the better setups I've seen on YT. Nice one.

  • @filmfreaken
    @filmfreaken5 жыл бұрын

    Thank you alot for this video, it helped me create this tool from scratch and i've synced carbs on multiple bikes with this!

  • @chukaz
    @chukaz5 жыл бұрын

    Just did my own tool for my V star 650 and it worked great, thanks for the video.

  • @hotdogdog4740
    @hotdogdog47405 жыл бұрын

    “Fish tank tubing” ichiban moto would be proud

  • @fasteddieskustoms
    @fasteddieskustoms11 жыл бұрын

    Your a genius man. I wish you nothing but luck and prosperity in the future .

  • @costelconstantin978
    @costelconstantin9783 жыл бұрын

    Made it two days ago on my Silverwing 2001. ! Huge deference! Thanks buddy!

  • @danjaynes2137
    @danjaynes213711 ай бұрын

    Thank you for the clear and thorough demonstration. Great video.

  • @Terkee
    @Terkee9 жыл бұрын

    Best sync vid on KZread and I have watch a lot of them.

  • @boomerguy9935
    @boomerguy99355 жыл бұрын

    I just sync'd my dual carbs on my 1988 Honda Shadow VT600 VLX using your procedure and manufacturing instructions for the homemade manometer. It worked great! One suggestion: Don't overthink the CW vs CCW thing about the adjusting screw. Just watch the tiny bubbles in the crossover tube (I used red ATF instead of water) and you can see the direction of flow. This is much quicker than waiting for the level to change in the bottles. Also, my screwdriver had to be in a vertical position, pointing downward from where the gas tank was attached ( had to remove the tank which turned out to be a good thing because I discovered a leaking petcock) which put weight on the adjusting screw, so I removed the screwdriver after each adjustment. I also "blipped" the throttle a few times throughout the adjustment. Total time of actual adjustment was less than 10 minutes. I don't know if it made a difference but I reinstalled the air filter housing after installing the brass adapter tubes and clear plastic fuel lines (5mm ID) for the adjustment.

  • @BasicPoke
    @BasicPoke4 жыл бұрын

    Thumbs up for the carb sync animation at the end. Thanks for the video.

  • @heartfang21
    @heartfang217 жыл бұрын

    looking for a way to synch my carbs on the same bike you have! haha! so this was fantastically informative. Thanks!

  • @cheesymcbuttkins6323
    @cheesymcbuttkins63238 жыл бұрын

    Great video and well edited. This seems to work and I will definitely be referring it to some friends

  • @HowardNChauncey
    @HowardNChauncey10 жыл бұрын

    I love the way you broke it down.

  • @liferider2089
    @liferider2089 Жыл бұрын

    A good monometer set up because of clear hoses to carbs NOT connected directly to carbs (just to top of bottles) so liquid doesn't get sucked into engine.Nice one ;)

  • @bobs2440
    @bobs244010 ай бұрын

    Great video and synch tool. Others may have said this, but the relative heights do not matter with the tool you created, only that they no longer move fluid between the two bottles.

  • @Lonnie-bb5ok
    @Lonnie-bb5ok10 күн бұрын

    This is an excellent vid, and very ingenious, cost effective, thank you 👍

  • @grreeknick
    @grreeknick10 жыл бұрын

    Your videos are the antithesis to the stupidity of youtube comments. Brilliant!

  • @herbmorris2762
    @herbmorris27627 жыл бұрын

    Well done video. Thanks. I'm going to give it a try!

  • @ddubrall
    @ddubrall8 жыл бұрын

    best one I've seen yet!

  • @Zkkr429
    @Zkkr4299 жыл бұрын

    Great video, I will be making me one of these bottle indicators!

  • @roman_verenich
    @roman_verenich10 жыл бұрын

    Amazingly! Greetings from Belarus HighFive!!!

  • @pauls28
    @pauls289 жыл бұрын

    Great Video! I need to sync my Yamaha Super T carbs, lost some power last year on a red line and I think this is the issue from what I've read in the forums. Defiantly a thumbs up on this one!

  • @alexandergardner2396

    @alexandergardner2396

    9 жыл бұрын

    Paul spisak Hey Paul, Is that on the old 750 Super T or the new 1200?

  • @MarcoBiscarini1
    @MarcoBiscarini17 жыл бұрын

    Great video man! Hope this works for my bike.

  • @SwedenAirhead
    @SwedenAirhead4 жыл бұрын

    This was fun! I´m propably make one to! Thanks!

  • @davidthompson103
    @davidthompson10311 ай бұрын

    Great job, doing this on the weekend 👍

  • @reido2000
    @reido20009 жыл бұрын

    Gonna try this out on my 82 Suzuki gs400 this weekend. Thanks.

  • @crash5868
    @crash58684 жыл бұрын

    I like the freezer tactic. I have got four carbs to do on my Kawasaki 550 zephyr but I'm sure I can figure out the build.

  • @Watupm
    @Watupm11 жыл бұрын

    moving the H at the end was cool lol XD

  • @Nicolas-xg6pg
    @Nicolas-xg6pg7 жыл бұрын

    Great video! Really useful! Thanks!

  • @malcolmhodgson7540
    @malcolmhodgson75403 жыл бұрын

    What a superb result.

  • @twistedmetal701
    @twistedmetal7019 жыл бұрын

    Thankx man. Very informative

  • @bjamesW32
    @bjamesW3210 жыл бұрын

    You mention at the beginning that you don't care for the gauge manometer because the needle keeps jumping around at idle. I wonder if you could simply use a damper in-line? Perhaps something as small as one of the bottles you are using for the fluid manometer or a bit larger? Ultra easy to try anyway. Just a two port rubber plug to stop the bottle and the air volume inside smooths erratic pressure/vacuum changes without altering the mean pressure/vacuum, kind of on the order of an anti-knock riser in plumbing.

  • @williamramsey4431
    @williamramsey44313 жыл бұрын

    Thank you sir!!!! Cheap and appears to work.

  • @TriniRogue
    @TriniRogue9 жыл бұрын

    Lmao @ actually throwing em in the freezer take a thumbs up just for that.

  • @abelbabel8484
    @abelbabel84845 жыл бұрын

    Good info, well presented. Have a thumb

  • @2369chico
    @2369chico11 жыл бұрын

    That's cool . well done .thanks for sharing.

  • @nevek20
    @nevek2011 жыл бұрын

    I didn't mangle my hand via my bike but i did mangle my hand and my surgeon was talking about how hands are the hardest to put back together properly and in conversation we got onto the topic of Bikes and common injuries and hands are common as you put your hands out infront of you to save yourself.

  • @viliusbivainis7883
    @viliusbivainis78837 жыл бұрын

    Great video! Thanks

  • @michaelwilliams4974
    @michaelwilliams49743 жыл бұрын

    Great video man

  • @ricardomunoz2010
    @ricardomunoz20105 жыл бұрын

    Awesome tutorial

  • @nivlacker101
    @nivlacker10111 жыл бұрын

    didn't even know such a thing existed thanks

  • @KK-mx2di
    @KK-mx2di Жыл бұрын

    Thank for knowledge ❤❤❤

  • @snatr
    @snatr2 ай бұрын

    That is cool. I gotta try this! Was thinking about using a light oil instead because if you watch @7:00 when you rev the engine, you'll actually see water vapor form in the bottles. Although a little water vapor in the engine is no big deal. And btw, did you know you can actually boil the water off with enough vacuum. Science 😉

  • @sinisakragulj104
    @sinisakragulj1044 жыл бұрын

    thank you! very helpful!

  • @ulises83
    @ulises8311 жыл бұрын

    awesome my good sir. Thank you!

  • @deadguy237
    @deadguy23711 жыл бұрын

    bike sound real nice man. enjoy in and very funny out tro

  • @korzbro35
    @korzbro356 жыл бұрын

    Man, simplicity of your idea is awesome! Thanks for sharing this. Out of curiosity, is it possible to make this for 2+ carbs?

  • @vertonmccaulou5

    @vertonmccaulou5

    4 жыл бұрын

    Just have to start at one end and do 2 at a time

  • @jotarokujo6729
    @jotarokujo67295 жыл бұрын

    I’m going to try this on my 89 gs500 ! Hope it works

  • @alexteo2738
    @alexteo2738 Жыл бұрын

    Thanks for cheap and good idea!!! ;)

  • @MarkLoweLowebrau
    @MarkLoweLowebrau3 жыл бұрын

    Good job!

  • @AuMechanic
    @AuMechanic8 жыл бұрын

    Vac gauges are plenty accurate enough, all you are lacking is a small air tap found on fish tank air pumps which needs to be closed down so that the vac gauge just stops pulsating. One for each gauge.

  • @elstupidos3863
    @elstupidos38637 жыл бұрын

    nice video ! what did you take to conect the tubes to the cylinder ?

  • @benjaminwest2281
    @benjaminwest22814 ай бұрын

    Thank you Forrest. Very good video. I like how you had an old motorbike also. Have you done this under a load, also? Say 2200- 2500 rpm, to adjust the cable lenghths? Ok, take care, Benjamin

  • @paulb4777
    @paulb47775 жыл бұрын

    I'd like to use the same method on a set of SU HD6 Carbs but I don't know where to connect the two synchronization tube's. Could it be to either the overflow or the suction pipe?? - Great video by the way 10/10

  • @CandiiBanks
    @CandiiBanks9 жыл бұрын

    Haha you're a legend, great watch!

  • @SpecThompsonTV
    @SpecThompsonTV11 жыл бұрын

    Great tip.

  • @combinbain
    @combinbain9 жыл бұрын

    Nice video! I can't get one point: can I make this calibration even without cleaning the carburators first? I mean, I have my bike in here in her side stand, can I just try out your method or I need to do anything else first?

  • @OU8121ST
    @OU8121ST10 жыл бұрын

    Awsome vid

  • @Zaiyetz
    @Zaiyetz11 жыл бұрын

    The boat man, let's see the boat!!

  • @daniiielherix6223
    @daniiielherix62237 жыл бұрын

    good idea !

  • @michaelwilson8461
    @michaelwilson84614 жыл бұрын

    My biggest question is how the hell did you get the lime slices out of the bottles? lol

  • @arvincharlesatega5660
    @arvincharlesatega56609 жыл бұрын

    Deserving to be subscribed, thanks

  • @MegaChevy65
    @MegaChevy656 жыл бұрын

    Nice. Where do you get rubber plugs though?

  • @konr4d
    @konr4d4 жыл бұрын

    brilliant

  • @W3BZSL1NG3R
    @W3BZSL1NG3R11 жыл бұрын

    I have a 72 cb 750 4 into one long tube header kerker pipe love my bike

  • @Zakamooza
    @Zakamooza6 жыл бұрын

    can you bypass the bottles and just hook the tubes directly in the carb vacum ports ?

  • @rupturemetal5471
    @rupturemetal54713 жыл бұрын

    I’m going to try this. I tried the other method where they get a yard stick, 2 stroke oil, a 4 meter clear hose. That oil was jumping all over the place, fixed nothing.

  • @spartn2304
    @spartn23045 жыл бұрын

    How does this work on a 4 carb setup? Just have to check 1/2 - 1/3 - 1/4?

  • @BryanKale777
    @BryanKale77711 жыл бұрын

    Nice a buddy of mine is balancing for cards right now

  • @atsernov
    @atsernov10 жыл бұрын

    Your balance job was dead on man. With this system you're not looking for the level to be the same, that part is irrelevant because all this setup does is show you a vacuum difference. You know the carbs are synched when the levels stop changing.

  • @ctsteve1967

    @ctsteve1967

    4 жыл бұрын

    and all you had to do is change one carb

  • @AnthonyJenningsTech
    @AnthonyJenningsTech11 жыл бұрын

    I have these carbs for my '78 CB400T II Hawk :)

  • @runsolomon
    @runsolomon6 жыл бұрын

    Where do I get the fittings for the vacuum ports

  • @andremestanza8852
    @andremestanza88526 жыл бұрын

    You are a champ

  • @L0manO
    @L0manO10 жыл бұрын

    Thanks!

  • @ugotgankked
    @ugotgankked5 жыл бұрын

    I tried a different set up and got water sucked into the carbs. Now the bike won't start! How do I get the bike to start again (it's a 2009 ninja 500r)? Going to use this method in my next attempt, thanks for the vid :)

  • @Maruti_motoshop
    @Maruti_motoshop Жыл бұрын

    Brother, if you set the air screw of the throttle, then the rpm will also change?? 

  • @joelcastro4521
    @joelcastro4521 Жыл бұрын

    What do you use to connect it to a 84 Honda shadow 700 I mean to the engine

  • @ClintsTractor
    @ClintsTractor10 жыл бұрын

    In the beginning of the video he said he got the bottle idea from other people, as for the carburetor adjustments and what not, I would assume he got them from the FSM. (Factory Service Manual)

  • @a-voroshilov
    @a-voroshilov6 жыл бұрын

    Прикольно, спасибо

  • @csselement
    @csselement3 жыл бұрын

    It seems one could do a fair job merely by sound. Thoughts?

  • @room311tattoo
    @room311tattoo9 жыл бұрын

    Thnks !!

  • @ddmarin1833
    @ddmarin18334 жыл бұрын

    Excelente

  • @eliseoebarahona9486
    @eliseoebarahona94868 жыл бұрын

    where did you buy the rubber plugs?

  • @MegaVranjanac
    @MegaVranjanac5 жыл бұрын

    Do you sync them at 2k rpm or just at normal 1k idle ?

  • @deankingi7417
    @deankingi741711 жыл бұрын

    Your a genius

  • @W3BZSL1NG3R
    @W3BZSL1NG3R11 жыл бұрын

    Love Honda

  • @ergner
    @ergner8 жыл бұрын

    How can carbs air-fuel adjust?

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