Okay here’s the quick version: no it doesn’t hurt the motor, it’s normal when upgrading exhaust, the popping is from the unburnt fuel igniting in the hot exhaust. However there are some instances where the popping is a result of a bad tune or vacuum leak etc etc

@MrxPacklex

2 жыл бұрын

A true saint. Thx

@daleryan7882

2 жыл бұрын

well..yes...thats the closest to the correct explanation ive read so far. yes, its unburnt fuel in the exhaust but, the reason is not because of too much fuel..its the opposite..the fuel air ratio is too lean, which results in high exhaust temps then as we deceleration and cut off air, the fuel mixture then becomes incomplete burned as it enters the hot exhaust pipe. thats why we need to richen the fuel air mixture ratio becomes less combustible as it cools the exhaust pipe temps aswell. another thing that causes popping are leaking exhaust donuts

Thanks for the question, I'm not going to answer it but here's some other info.

@mthewolf1095

4 жыл бұрын

Actually the answer was in there, but it wasn't directly stated. If you having decel popping between 2 rpms (probably a bad EFI map or if you're running carbs you have a jet that is too big) then you are probably running too rich since the pop occurs when un-burnt fuel mixes with fresh (O2 rich) air in your exhaust and the temp is high enough to ignite it. Try decreasing your main and pilot jets (one at a time then checking it by riding and doing several decels).

@tcatnat70

4 жыл бұрын

The question, and the title of the video, was "Does decel popping hurt my motor?" He told us the causes and how to tune it out.

@tombo3342

4 жыл бұрын

@@mthewolf1095 lol you didn't answer it either with a simple yes or no. Just offered even more information that is appreciated but still not the simple yes or no i think folks were waiting for.

@jimmyjambon9206

4 жыл бұрын

Potentially yes.

@normanderson3591

4 жыл бұрын

@@mthewolf1095 Sooo....does it hurt the motor, or not?

I like my decel pop. It alerts drivers behind me with their head buried in their phones that something is happening in front of them. Just one more layer of protection from being rear ended by someone not paying attention.

@istvanbalogh8254

2 жыл бұрын

Absolutely great point bro !! LPSL--

@houttx83

2 жыл бұрын

My thoughts exactly sir…….

@thebaddog4104

Жыл бұрын

My grenades take care of that

@elguitarTom

10 ай бұрын

You think so. But they don't hear you in their sound bullet proof cabin blasting music. Loud pipes never saved any lives what so ever

@ErikR1979

10 ай бұрын

@@elguitarTom yes they do.

Love that popping sound! Same as jake brake on big rigs.

Thanks for answering the question, said no one that watched the video.

Been running stage one and Vance and Hines short shot staggered pipes on my 2014 Sportster "48" for about 6 years. A bit of pop now and then. But no damage that I have seen.

My new 2020 Harley street glide special with stock exhaust pops a few times coming in for a stop. I love it, the stock pipes must be breaking in some because they have gotten a little louder. I was going to get some other slip on but not now. I love coming into a stop the big 114 is rumbling popping everyone is looking around, kids are waving. One guy had his ph up taking a picture, what the hell maybe he sent it to his wife and said this is what I want. Love the rumbling and the popping that's why I got a Harley.

Thanks doc but no thanks.... I love my "popcorn popping" on my short swipers.... But THE QUESTION IN PLACE WASN'T ANSWERED!!!... Is it harmful for the bike?

Thanks for that insightful answer or lack thereof

@LowCountryHarleyDavidson

13 күн бұрын

Very welcome😄…..Doc

My 2019 Street Rod had a bit of a pop and crackle from the day I bought it, even with the stock exhaust. A tuner made it go away, even with the aftermarket exhaust... the tuner actually had a setting for the decel pop.

I have a 2002 Road King, Hypercharger, Fish Tail pipes. Added baffles and some pipe wrap, still sounds great and sounds awesome, no popping noise when decelerating.

Good point of noting the popping range for isolation of lean mode

I love when it pops, with flames even better! No wildlife around who could cross my road. The only thing with (too)open exhaust is that you loose torque, for the rest big fun!

@danielkilbourn4961

3 жыл бұрын

Try some torque cones. Did the trick for me. Cheap fix but you should do the exhaust gaskets too. Watch some videos on that as you can make a cheap tool that makes the job very easy.

But is it harmful?... Because truth be told it sounds awesome 😎

@trex69

4 жыл бұрын

Truth be told it sounds like shit.

@camgnilpe9300

4 жыл бұрын

@@trex69 opinions are like assholes!

@user-eh6pk1iy1d

4 жыл бұрын

I agree when my fat boy starts to do that I let it happen because it sounds like that bike is boss... LOL

@user-eh6pk1iy1d

4 жыл бұрын

@@trex69 Cam is right opinions are like assholes.....

@theturtlethebanjo195

4 жыл бұрын

No it doesn't hurt the motor. Pop away

The decel pop on my street rod 750 with V&H is savage. Anyone can hear love it

I have a 96 dyna with a stage 1 (CV carb). Had bad decel popping for quite a while and tried just about everything to get rid of it. Previous owner did the stage 1 and wasn't to sure if he did it right. A stock main jet is a 42. Already had a 45. Just for sh*ts and giggles I installed a 48 main jet. Wouldn't you know it, decel pop went away. Other things to look for is leaking intake gaskets and exhaust flange gaskets. For my bike it was starving for fuel.

Hey. Doc I really enjoy your commentary instructions and insight about Harleys, I was just watching your episode on decel popping, as someone who worked in high performance engine shops when I was younger and we had a Dino. I learned it's always better to put the bike in neutral and use the brakes instead of using the engine and transmission to slow it down whenever possible and the dyno operator said when you decel with the engine it makes it harder on the ring lands of the Pistons and I believe it

@LowCountryHarleyDavidson

2 жыл бұрын

Thanks for sharing...Doc

@th33b33

2 жыл бұрын

It’s a safety issue. You don’t have control when you need it if It’s neutral. “Makes it harder on the rings” that’s its normal operation it’s designed to do that. How many people do you know that had to rebuild their engine due to keeping the bike in gear

@stevesyncox9893

Жыл бұрын

Ever follow a truck? “Diplomatic Doc”

Since Doc didn't answer the question I'll take a go at it. Because the decel poping is taking place in the exhaust toward the end or tip end of the exhaust pipe, my answer would be that it depends on how short the exhaust pipes are. As with any motor as long as the combustion of unburned fuel is taking place outside of the exhaust manifold then the only damage that can occur would be to the exhaust pipe it's self, and even then I don't think that the detonation of unburnt fuel in the engine itself on the exhaust side will cause any harm. An example of this would be the 4 cylinder engine that Ford put in the Ford ranger it actually had eight spark plugs for four cylinders, four on the intake side and four on the exhaust side, so you could see with that engine you were having a second detonation of unburnt fuel inside the engine and Ford did this to improve admissions and also give better fuel mileage. This was the engine that was also used in the small Mitsubishi trucks that sold back in the '80s and we all know how dependable those little ranger and Mitsubishi trucks were.

Thanks william just saved me three mins yep chain is loose when it comes off hope its not on the road

Ummm so this video should be labeled “how to help your tuner tune decel pop”

i LOVE this sounds, reminds me of driving a stick shift. Would never get rid of it on my bike. All you have to do is cruise at low speed, don't rev it when you're heading into the neighborhood.

@kap419pres

Жыл бұрын

Same. Every time I come home I let her scream so I can pop away and let everyone know I’m home.

I did not hear the answer. Is the popping harmful to the motor?

@rgh622

4 жыл бұрын

No, he didn't you didn't hear it.

@rgh622

4 жыл бұрын

@gemini232003 the question is not "how it occurs" the question is, "is it harmful to the engine? Look at the title of the video. By the way, cover that exhaust up and keep anything from coming out of it. Now tell me if it hurts the engine.....

@scottbruce8951

4 жыл бұрын

@gemini232003 you missed the point. And you pompous attitude makes you an arrogant simpleton.

@scottbruce8951

4 жыл бұрын

@gemini232003 so many things are being discussed and your and my questions are being passed off as ignorant when we are trying to bring that those to light. Lots of ignorant self righteous fools. Real men don't try to belittle people with questions. I applaud you.

@randydixon5621

4 жыл бұрын

@Yamaha Venture if you listen really closely you can hear a muffled decel pop on some stock exhausts.

If you clutch in then there cannot be any decel pop as the engine is no longer being uses to decel the bike, so clutching in (as stated) and listening for the range at which the engine is popping is not correct, just decel and tell your tuner the gear and rev range you observe. I like most of your videos Doc as your usually spot on the money with diagnosis and explanation ,but this one not so much with this one, most of the comments are confused viewers maybe some clarification or a remake. Keep up the great videos

My 2000 Harley Davidson Softail Springer the popping during deceleration is something to behold. I swear that Beethoven would of loved those Musical Sounds! That’s my type of stereo system I like on my Harley….. I have stage 2 screaming eagle with short double straight pipes-- 🎼 🎵 🎶 and, pop goes the weasel and the Harley 🎼 goes POP POP 🎶POP - 🎵POP

@LowCountryHarleyDavidson

2 жыл бұрын

Play on Mistro!....Doc

My 2018 1200 Custom has a pair of S/O Firebrand Loose Cannons. 2" Baffle. Arlen Ness Stage 1 intake. FP3 Map. Once in awhile I get a POP. The Roar is more of a problem than anything. Especially leaving for work at 3am.

It seems I mostly get popping from engine braking. If I pull in the clutch the RPMs drop rapidly and I barely hear a pop. Does placing a baffle in smaller diameter shotgun pipes help to restrict some of the back pressure? It looks like they were taken out on the bike I just got. Thanks

Loud pipes saves lives!

My brand new 2013 FXDC ANIV popped when new. A backfiring new motorcycle! It led me to install PC fuel control.

@bullwinklemoose9574

3 жыл бұрын

So did / does my '13 FXDC, as did my new '07 883XLR. Good thing I like the sound 😊

Another great video. I always learn something from your videos. Keep them coming

It's not harmful to the engine, nor does it hinder performance, since the detonation occurs outside of the engine in the pipes, when not accelerating (decelleratating, obviously).

Guys he did answer the question. It happens in the exhaust. The muffler and pipes are not a part of your motor. So no it wont hurt your motor as its not involved. Granted he didn't spell it our for you Barney style but gave you the info to answer the question.

@ryanfowler2595

2 жыл бұрын

This guy gets it!

The answer is no, it does not hurt the engine. It all happens in the exhaust system.

@xldh44

4 жыл бұрын

Well geez, finally "the answer" thank you!!

@Evirthewarrior

3 жыл бұрын

@@xldh44 But it does make your motorcycle sound like ass and makes you look like you have no idea how to set your motorcycle up.

@OLDMANGAMING1970

3 жыл бұрын

@@Evirthewarrior I like being a ass.

@raymondlowrey3572

3 жыл бұрын

@@Evirthewarrior sounds like your the ass!!

@Evirthewarrior

3 жыл бұрын

@@210cuervo6 If you think exhaust backfiring and sounding like a clown as it pops and pings sounds good, go for it, I think it sounds like complete ass. It should be a nice rumble as you decelerate, not BANG POP POP POP PING POP POP POP POP.

So my take away is - since this combustion happens in the head pipes, outside the engine, it does not hurt the engine.

Thanks Doc..👍🏻

My fp3 has a setting with how much pop you want (1-4 I believe) I have it in one not necessarily for the noise, but I have a hill right by my house that deer always cross. I'll throttle up and let off figuring a couple bangs will keep bambi from jumping out in front of me.

@kevinhendley8524

2 жыл бұрын

Does that feature reduce or add pops? I have screaming eagle tune and love the pops. I’m afraid a FP3 will get rid of them

always learn something new from your videos, thanks for all the easy to understand info

For all you people who don't understand anything, he did answer the question. Decel pop is unburnt fuel in the exhaust igniting. Since the unburnt fuel went through the exhaust ports into the exhaust there is no harm done to the engine. It is actually a slight rich condition,which is way better than being lean. It's not rich enough to wash out the cylinders though. Now with fuel injected vehicles, fuel does not cut completely off when you close the throttle. The ecm let's a little bit of fuel to go through so engine breaking isn't so hard and to control the heat some. With some aftermarket tuners you can turn off fuel when you close the throttle. The is also another reason you can get Decel pop and that is from an exhaust leak. A excessive exhaust leak can burn up the exhaust valves because the exhaust is not evacuating far enough from the ports. I do take back my first statement and I'm too lazy to go back up to correct it. So the answer would be yes and no depending whatthe cause of the pop is

Reminds me of an auto shop teacher I use to have. I would ask him questions and he would just talk his way out of it never answering the question.

Its it backfiring because of the jet sizes for air and fuel, you either go up one or down one size to get the jets correct for the fuel, for the backfire issue. Good videos,! I have a question, what make is the dyno?

You never did say if it was bad for the engine, so the question still exists. 😫. He explains why it happens, and where it happens, but never started a yes or no its not bad. Just because it happens in the exhaust doesn't mean that the fuel igniting in the exhaust won't cause some kind of reverse exhaust pressure that may hurt the valves or something. So what's the full answer Doc??

@PotatoeJoe69

2 жыл бұрын

No it's not bad for the engine. It's unburnt fuel making it into the exhaust then igniting. Occasionally, a really piss poor tune can cause decel popping; but if that's causes by the tune, you're bike is probably gonna be running like shit all around, so it won't be a mystery.

@VeritasEtAequitas

Жыл бұрын

Lol, reverse pressure hurting valves? Wow...

I’ve been riding Harley for over 55 years. If you don’t like the popping noise. Learn to tune your own motor and carburetor. I’ve never had a popping out of any of my bikes. Well, I had it when I first started riding but after a week or so. I learned how to get rid of it.

@LowCountryHarleyDavidson

2 жыл бұрын

Spoken from a True Tuner.....Doc

Thanks for the info Doc!

Mine sounds like a Demon!!! I love the way it sounds. 40k hard miles with it like that.

Thanks Doc, great video! Shared it with my Triumph Thunderbird group as we also have the same issue. 👍

@stevesyncox9893

2 жыл бұрын

My 95 was crazy with 13” shorty’s on it, I had to baffle and glass pack the pipes to reduce it.

My street Bob pops and crackles like crazy when I let off but it doesn’t seem to hurt it. It’s a mean bike so I expect that to happen!

Fun fact; wrapping your exhaust with fiberglass wrap or titanium wrap can basically eliminate decel pop. The extra heat in the pipes makes any unburnt fuel vaporize, and the extra heat also causes better scavenging which prevents backflow of fresh air into the exhaust -- when then let's the heat properly evaporate any fuel without popping. But of course this has its limitations. If you're running 12" long shotgun pipes, you're gonna have decel pop no matter what you do.

@LowCountryHarleyDavidson

2 жыл бұрын

Thanks for sharing this tech tip....Doc

@BLAZANasn

9 ай бұрын

Is this true, does a wrap help with the pop?

I got supertrapp mufflers on mine, I just played with number of discs until I got a happy medium...minimal popping, decent sound.

@whatsstefon

4 жыл бұрын

John Garrison I wish I could find a Supertrapp for my bike. Seems it doesn’t exist for my model. So sad.

@jonnycando

4 жыл бұрын

Stefano Musica pure luck for me they showed up on eBay so I snapped them up... a few hours polishing and good as new but more importantly I can tune my exhaust to the bike!

@hillbillyhicks8102

4 жыл бұрын

Them there are old school pipes there. Ran one on my Quad racer back in the 80's

This was very informative. Thank you.

He never said if its bad or not personally i like it alot i like shooting flames too but too each their own

I have a 03 Heritage Softail Classic flstci and I get rid of what little popping happens by rolling off the throttle slowly,takes it away immediately

I have an 06 sportster 883 and I’m learning these things as I go. I’m trying to figure out why my Breather (silver casing on the right side) it has an ‘airy pop’ sound to it? But it gets my attention when riding. Not sure if it’s just on Accel or Decel.. but any help?

A lean decel pop can potentially cause damage over a period of time whereas a rich decel pop is only possibly harmful when installing new jugs and slugs during the break in period, ring washout. An easy way to tell if you’re too rich or lean is pay attention to what the engine does during certain temperatures and this should steer you in the right direction. Anybody who also runs a Mikuni knows all about this lol

Thanks Doc! Question: I ended up with lots of decel pop after installed a free-flowing headpipe and mufflers on a '15 FLXH. The recommendation from the tuner was to "if you are getting some popping during decel we generally richen that area slightly in the VE table as well as the decel enleanment". Can you explain why adding MORE fuel would reduce the decel pop?

@kimharbison5277

4 жыл бұрын

I've read the added fuel makes the mixture is too rich to burn in the headpipe. Between using the 'firecracker' settings and running an AutoTune session with the FP3 I've eliminated probably 95% of the popping on my Sportster.

@raymondpontremoli4500

2 жыл бұрын

@@kimharbison5277 Be very careful about making the mixture richer. The added fuel washes down the cylinder walls and removes the oil put there by the rings for lubrication. You wash it off, you get more wear....Just my two cents...

@sswcustomsewing4276

2 жыл бұрын

@@raymondpontremoli4500 Agreed 👍

I put some pro parts on my 50cc moped, My moped is doing the same thing now hahaha Decel popping, mainly on deceleration :D lol

I've been wondering this myself. I have an 06 Night train with the thunder header and Arlen Ness monster sucker intake and my bike pops on decal A LOT! I think the answer is no, it will not hurt it, but he wasn't very direct in his answer.

Back in the carburetor days we would hit the kill switch and coast a little and throw it back on for a loud Boom. Was always good for teaching the neighborhood dogs not to chase cycles.😂

Doc Harley looking hard with that beanie and new tear drop tattoo

Always use your brakes to slow down, never use engine braking. Brakes are much cheaper than transmissions

I'm really surprised he didn't say stop right there and bring to your dealership

I wonder how you tune it manually using the fuelpak

I like the gurgle when off throttle and costing down but do not want it to pop

Hey doc should I remove the cat on my Dyna? Already have slip ons. But wonder if I’m still restricted power. Got a intake and tuner also

@LowCountryHarleyDavidson

Жыл бұрын

As a Harley-Davidson Technician I can not endorse removing a Cat. I also know the programming in the bike will still try to heat up the cat even if it’s not there. Also if your chosen slip ons are too large the fresh air will confuse the O2 sensors. Will the header flow more and run cooler? Yes….for “off-road racing” only of course….Doc

Good just perfect explanation ,, my bike just pop one single time 3 seconds turn off only when I turn off, 3 seconds and POP!!!! Why u think do that?

@LowCountryHarleyDavidson

4 жыл бұрын

I am sure that’s a big surprise! I do not know. Thanks ~ Doc

If I change out the stock exhaust on my 04 fatboy to V&H big radius exhaust an kept my standard air intake would it require me having the bike tuned an air flow adjusted or is this something I can just do myself?

@LowCountryHarleyDavidson

Жыл бұрын

Tuning is always a plus (performed by a good tuner) Not completly necessary for muffler changes but you are going to change the whole system. Also Tuning might tone down a lot of decel popping (not all with those pipes)...Doc

My Triumph Thruxton and Harley Fat Boy both pop around 2200 rpm when the throttle is closed .

personally wouldn’t want any unburnt fuel coming out of my exhaust. I imagine it would be more efficient to have all the fuel burn just right. not too lean, not too rich either.

@LowCountryHarleyDavidson

2 жыл бұрын

Good point..Doc

@sswcustomsewing4276

2 жыл бұрын

Those are my thoughts too find that happy medium for power and efficiency. I like to tune engines using my old Sun machine with exhaust gas analysis for that reason. Most people go too rich, never check the timing, dont check float height, dont set the float height right, never run correct spark plugs, don't learn how plug heat ranges influence engines, and think that reading plugs on air cooled engines is the the same as water cooled engines.

Another informative video. On the the exhaust issue, If I change my exhaust pipe, just the muffler, from a Street Cannon to a non catalytic muffler, do I need to re-tune my bike or will it auto-tune? I have a FLSB with S III and Pro Street tuner.

@tylerfj24

4 жыл бұрын

anytime you mess with the air going in or out you should tune. if you remove a cat, you are allowing A LOT more air to move out and it takes away from the backpressure. you will need to tune if you want to run properly and get back some of the low end tq you will lose.

@LowCountryHarleyDavidson

4 жыл бұрын

Yes, have it tuned.

@miketodd8640

4 жыл бұрын

Thanks

Answer the Question PLZ... Just how bad is it? Also can the SE Smart Auto Tune Pro help with the problem???

I’m running a Kuryakin Hypercharger with Vance and Hines open pipes and my pop comes and goes , but there are times that it’s so loud I swear I’m being shot at, I mean shotgun loud bro, I’m afraid I may scatter a crowd, Damn it man lol

I personally like the pops. Some people even pay to have a tuned to have poping on their vechiles.

Doc, this is something i have been dealing with this past year, but mine is a little diff. i have a 2018 street glide, with open exhaust and high flow muffs. however MY bike does not decel pop but what i call "shift popping" Only upshifting, and only when you get on it for the first 2 -3 gears. rev up to about 3500-4000 rpms, clutch shift, POP, thats it. wont do it when just normal driving but only from a stop through 3rd gear getting to about 4k. For the life of me I cant tune it out.. i have checked every seal, exhaust leaks, etc. we found an intake leak but HD put in the new aluminum intake, but it still does it.. I am completely stumped on this.. on decel, NOTHING happens.. I am about to put the stock "exhaust pipe on" and leave the aftermarket mufflers on to see if the CAT keeps the popping from occuring.. is this a waste of time to try that? THANKS!

@LowCountryHarleyDavidson

4 жыл бұрын

What tuner are you using? & the CAT should stop that from happening.

I have a question, does decel popping hurt the engine?

Re-map your fuel injection when you change pipes.

So I just bought a 2021 z125 pro with yoshi pipe on it, it has tunes and everything and it decel pops 2 out of 3 times when I let of the gas going anywhere between 35-60 mph I don’t mind it and actually think it sounds cool but I don’t want it to cause any potential engine damage so my question being if I were to just leave it be would it fuck up my Engine in any way ?

@LowCountryHarleyDavidson

2 жыл бұрын

You need to ask your question on a forum that deals with z125..Doc

Doc I have a 2016RGS. I am thinking about upgrading the engine to get more torque and HP. My hesitation is that a Milwaukee 8 has the torque and HP I want. Is a twin cam 103 going to worth it? Thanks

@LowCountryHarleyDavidson

4 жыл бұрын

FACT: A M8 Stage 2. That is pipe air cleaner and CAM upgrade is stronger and less expensive to build them a Twin Cam Stage 4.

My sporster been popping for 90000 plus miles still going strong...

My 660 raptor quad does the decell pop and back fire bad. Cause valve need adj and carb tuned

Hey Doc,does it hurt the engine maate???cheers

@jonnycando

4 жыл бұрын

nunya business true it does not but an egregious case can destroy the muffler!

Great explanation on way it happens but you didn't answer the question of is it bad for you motor. I know it isn't but for the people that don't know that way they asked it.

Hi Doc I was wondering if you can help me with my 2008 fatboy I have a low speed miss but after 30 km the miss goes away.

@LowCountryHarleyDavidson

7 ай бұрын

This could be so many things. Check intake manifold rubber seals. When cold extra fuel is needed. If you have a leak it would be lean when cold. Check spark plugs and wires. Condition of battery because the starter takes a lot of voltage robbing from ignition until the charging system kicks in. ..Doc

Hey Doc! What bike is this? It sounds monstrously beautiful

@LowCountryHarleyDavidson

Жыл бұрын

A built up Sportster👍

@CorpseOfAgathar

Жыл бұрын

@@LowCountryHarleyDavidson thank you!

If I change to a high flow exhaust and decide to tune the decel pop out, it seems like that would negatively impact the performance of the bike. Am I wrong with that presumption?

@LowCountryHarleyDavidson

5 ай бұрын

It depends how you tune it out. Most modifiers tune the closed throttle area above 1750rpm with no effect on other areas….Doc

So can the popping damage the engine? 🤔

Very simply put if you experience backfire when decelerating either your engine is not tuned properly or your exhaust aperture is too large for the engines displacement, or a combination of the two. And for those that think it sounds"cool" you wouldn't know a properly tuned motor from a hardboiled egg.

@OLDMANGAMING1970

3 жыл бұрын

f/u and your egg

i just got my 2016 zx6r dyno tuned and ecu flashed this week. Now the bike is SLOWER. It used to pull harder on almost every gear. Now the bike is slow even in first gear it just accelerates as if im in 6th gear from the start at a light or something. thats how slow it is now. how can i fix it?

@LowCountryHarleyDavidson

2 жыл бұрын

Bring the bike back to the tuner! Depending on what tuner you used the software could still be in "auto-tune" and you could be leaning out your bike while riding...Doc

Doc I recently changed my air filter on Harley 48 to a big sucker with a stock exhaust and it pops on decel… is the bike supposed to be tuned when you do a intake change???

@LowCountryHarleyDavidson

2 жыл бұрын

I need to hear from you. Your bike did not pop on decel with stock pipes and air cleaner. Then you just changed the air cleaner and you are now hearing decel popping from your Stock Exhaust with No modifications? This is new to me. I would have your dealership check your bike over. Sounds like your bike was too lean before....Doc

I’d love to have you build my 19 SG Special.

Love the popping on my bikes 💥💥💥💥💥💥💥

@Evirthewarrior

3 жыл бұрын

It sounds like ass, my first bike was used and the popping was one of the reasons I got rid of it, the others were that the meat head that worked on it, messed up the electrical, causing lights to go out, and it the pipes were so hot that it burned anything that touched them, even if it were for a very short amount of time, through the heat shield. IDK why people like it, it makes your bike sound like you have no idea how to set your exhaust up. The dealer took the bike back for as much as I paid for it on trade and I got a Fat Bob, was a great decision.

@luislugo3062

3 жыл бұрын

I got pops even on idle.

It won't hurt, usually vans and Hines will pop. So no it won't hurt and sounds cool.

My stock evo roadking always pops. no baffles in the twin vance n hines big ovals.

@LowCountryHarleyDavidson

2 ай бұрын

My opinion, Wasted power going out the back end…..But it sure sounds cool….Doc

I get a loud pop when I disconnect my battery from an old 73 ironhead. Any ideas as why this would occur?

@LowCountryHarleyDavidson

7 ай бұрын

If you have a mechanical regulator, the internal point contacts could be sticking. Bottom line is something is still energized when you disconnect the battery ( ground first of course)……Doc

Hey i own m109 boulevard and it has stock exhaust and i have took back muffler out the end tip of exhaust its now direct from catalytic converter its short pipe and it has gunshots when we deroll acceleration is it safe for bike Please reply

@LowCountryHarleyDavidson

5 ай бұрын

If the “cat” is still part of the exhaust you’re just making noise. I my opinion the percussion can break the end of the pipe eventually….Doc

@cad5114

5 ай бұрын

Do I have to worry about it or its safe its getting hard for me to take decision and I don't wanna screw up with engine so please give a final decision and also do I need to check something if I wanna keep it same Thank you Doc

Does decel pop have anything to do with the bike running rich?

He said it was fresh air in the exhaust hitting unburned fuel so, no. Not for the engine but not good for the exhaust! I used to shut off my old Sportster and turn it back on as I was driving down the road. It would "pop" real loud, until it "POPPED" the muffler open! Motor was okay but muffler was done!

@tylerfj24

4 жыл бұрын

that was stupid.. you left a lot of unburnt fuel in there..

@daleezzell1385

4 жыл бұрын

Yes, but I was young and invincible back then!

There's a whole lot of "He didn't answer the question!" and "Yes he did!" going on down here. Let's make this easy. He asked the question at 0:42, "Does decel popping hurt the motor?" Someone else go ahead and post at what timestamp he answers this question....... Good luck.

@silberfj

4 жыл бұрын

He answers the question at 0:50. "Fresh air can be drawn back into the exhaust system, and the un-burnt fuel that comes out of the motor mixes with a higher temperature in the exhaust system, and detonation happens... as the un-burnt fuel is being burnt." That detonation is happening in the exhaust system, not in the motor.

@rgh622

4 жыл бұрын

@@silberfj that was a response to his explanation of, "Why decel popping occurs." at 0:47. Even you had to add the last sentence of your comment because Doc never did. BTW, I love Doc and this channel, I think he just forgot to go full circle on this one. Safe rides.

Hey Doc does running a straight pipe hurt? I’m only on a little Suzuki gz250 cause money is tight

@LowCountryHarleyDavidson

2 жыл бұрын

It does not help...Doc

Still didn't explain if it hurts the engine any or valves my bike being an M8 bike with straight pipes it only backfires under hard acceleration one time between shift

I installed a thunder-max EFI system in my 02 fatboy a few years ago because I got tired of having to re-map every time I changed something on the engine. It has no popping on decel and honestly, I miss the exhaust pop on decel. I have even changing the EFI tune to try to get some of it back. The thunder-max works quite well, I am happy with it, fuel mileage went up considerably and my bike is quicker. However, I still miss the exhaust pop.

Doc, thanks for explanations. Sorry for off topic, but I don't understand what is the benefit of converting the belt to the chain for regular riders except an additional maintenance and a noise?

@LowCountryHarleyDavidson

4 жыл бұрын

Take a look at this video: kzread.info/dash/bejne/epdqq8qyaJWydNI.html

@rebel_ltz

4 жыл бұрын

Nothing. Belt is superior.

@inmate666

4 жыл бұрын

You can fix a broken chain on the side of the road pretty easy.not so easy with a belt.with a belt primary chain and swing arm need to be pulled . After breaking several belts i went to a chain .

@user-nf6en6wt1r

4 жыл бұрын

@@inmate666 ok it is a reason, thanks.

@inmate666

4 жыл бұрын

@@user-nf6en6wt1r plus i got to go to just a little wider tire.i ride like its still got a warranty so most of my breaking belts was my fault.if you ride normal a belt will last longer and they are not as noisy as a chain.i love my chain and it was worth the money and haven't broke my chain yet.

Not harmful my dyna 103 does it I’m running Vance and Hines big radius

@LowCountryHarleyDavidson

2 жыл бұрын

I am sure your loving it...Doc

@jasonduncan545

2 жыл бұрын

@@LowCountryHarleyDavidson na just part of it