DOC HARLEY: DOES DECEL POPPING HURT MY MOTOR?

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Doc Harley from the Service Clinic at Low Country Harley-Davidson to help you with the health of your motorcycle! This week he answers a viewer's question about if decel pop (the popping sound from the exhaust some hear when riding) hurts a motor by explaining what it is, that it happens in the exhaust and not the engine, why it happens and what to do if you want to lessen it.
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Doc Harley is a motorcycle technician at Low Country Harley-Davidson with over thirty years working on motorcycles. Over the years at the dealership he has worked on Harley-Davidson, Buell, and Triumph motorcycles with a few other brands here and there from trade-ins. There are thousands of how-to videos out on RU-vid and other websites across the world. Doc’s goal is to help solve problems that people run into when using their service manual, share insights only found as a certified Harley® technician, and some of the tips he’s picked up over the years.
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Low Country Harley-Davidson, 4707 Dorchester Road, Charleston, SC 29405

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29 янв 2020

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Комментарии : 439

@calebnezat8418 3 года назад

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 года назад

A true saint. Thx

@daleryan7882 2 года назад

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

@tcatnat70 4 года назад

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

@mthewolf1095 4 года назад

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 года назад

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 года назад

@@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 года назад

Potentially yes.

@normanderson3591 4 года назад

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

@ErikR1979 3 года назад

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 года назад

Absolutely great point bro !! LPSL--

@houttx83 2 года назад

My thoughts exactly sir…….

@thebaddog4104 Год назад

My grenades take care of that

@elguitarTom 11 месяцев назад

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 11 месяцев назад

@@elguitarTom yes they do.

@ARMASARMY 4 года назад

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?

@jacquesferhaniarnaut3524 2 года назад

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

@dgalaso 3 года назад

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

@OcotilloTom 4 года назад

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.

@myemailaddress93 4 года назад

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

@trex69 4 года назад

Truth be told it sounds like shit.

@camgnilpe9300 4 года назад

@@trex69 opinions are like assholes!

@user-eh6pk1iy1d 4 года назад

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 года назад

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

@theturtlethebanjo195 4 года назад

No it doesn't hurt the motor. Pop away

@caspar0777 4 года назад

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 года назад

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.

@lester101381 4 года назад

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

@Oddman1980 2 года назад

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.

@joehart6406 4 года назад

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

@upsidedowndog1256 4 года назад

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

@xldh44 4 года назад

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

@Evirthewarrior 3 года назад

@@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 года назад

@@Evirthewarrior I like being a ass.

@raymondlowrey3572 3 года назад

@@Evirthewarrior sounds like your the ass!!

@Evirthewarrior 3 года назад

@@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.

@rdaugherty52 2 года назад

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.

@scottbruce8951 4 года назад

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

@rgh622 4 года назад

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

@rgh622 4 года назад

@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 года назад

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

@scottbruce8951 4 года назад

@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 года назад

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

@theroadking547 4 года назад

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.

@frankburdi1001 2 года назад

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 года назад

Thanks for sharing...Doc

@th33b33 2 года назад

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 2 года назад

Ever follow a truck? “Diplomatic Doc”

@ut1004bp 7 месяцев назад

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

@roberthagen7024 4 года назад

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

@michaeldion8798 4 года назад

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.

@markgaston3824 3 года назад

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.

@borismatilda5170 3 года назад

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?

@steveross2797 4 года назад

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

@stevesyncox9893 3 года назад

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

@andrewshedron425 Месяц назад

Thanks for that insightful answer or lack thereof

@LowCountryHarleyDavidson Месяц назад

Very welcome😄…..Doc

@TrailBlazer5280 4 года назад

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 Год назад

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

@johnnyturbo8460 4 года назад

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 года назад

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 2 года назад

Lol, reverse pressure hurting valves? Wow...

@dryanberry 3 года назад

Loud pipes saves lives!

@ad78 4 года назад

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

@chrisphilhower6029 4 года назад

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.

@lelap2239 4 года назад

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

@fililoboesparza5784 4 года назад

Thanks Doc..👍🏻

@billh4121 3 года назад

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

@astrozombie2000 4 года назад

Thanks for the info Doc!

@stevek8829 4 года назад

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

@bullwinklemoose9574 3 года назад

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

@scottybutterworth666 3 года назад

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

@chrisblaskis7120 3 года назад

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 года назад

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

@sboy1955 4 года назад

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

@PotatoeJoe69 2 года назад

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 года назад

Thanks for sharing this tech tip....Doc

@BLAZANasn 9 месяцев назад

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

@biking-northwest Год назад

Anyone notice how slack that chain is? Thought it was going jump off the sprocket.

@michaeltaylor2079 3 года назад

This was very informative. Thank you.

@DanielRyanScott 3 года назад

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 3 года назад

This guy gets it!

@TheHighestGodisGood 2 года назад

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).

@Hoglife Год назад

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

@kam08479 4 года назад

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

@rodolfosabater7781 3 года назад

I wonder how you tune it manually using the fuelpak

@trannersawrus2398 4 года назад

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

@anitabonghit266 4 года назад

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

@rickharris323 4 года назад

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 года назад

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 года назад

@@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 года назад

@@raymondpontremoli4500 Agreed 👍

@jonnycando 4 года назад

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 года назад

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

@jonnycando 4 года назад

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 года назад

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

@istvanbalogh8254 2 года назад

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 года назад

Play on Mistro!....Doc

@Tacbi0325 4 года назад

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 года назад

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

@brodyrichard263 2 месяца назад

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!

@williamjohnson6517 4 года назад

So can the popping damage the engine? 🤔

@theone2be33 4 года назад

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

@lc286 Год назад

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?

@bobclapper2672 4 года назад

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

@BrianKeithPREPPER Год назад

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

@hpac8381 4 года назад

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

@tylerfj24 4 года назад

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 года назад

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

@robmespeedy Год назад

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.

@OLDMANGAMING1970 3 года назад

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

@maddmavic 3 года назад

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

@miketodd8640 4 года назад

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 года назад

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 года назад

Yes, have it tuned.

@miketodd8640 4 года назад

Thanks

@tsimmons1974ts 4 года назад

Love the popping on my bikes 💥💥💥💥💥💥💥

@Evirthewarrior 3 года назад

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 года назад

I got pops even on idle.

@kickenkaz1 3 года назад

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

@ShowseeTravels 2 года назад

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

@southernstingray2743 4 года назад

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

@jonnycando 4 года назад

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

@Jaycat48 4 года назад

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.

@ltsgarage7898 2 года назад

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 года назад

Spoken from a True Tuner.....Doc

@timdavis8154 4 года назад

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 года назад

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.

@miller17013 2 года назад

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 2 года назад

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

@goaheadmakeourdayscooterpe9644 Год назад

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.😂

@athenapaine4641 2 года назад

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 года назад

Good point..Doc

@sswcustomsewing4276 2 года назад

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.

@OttomanBeats 2 года назад

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 года назад

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

@CorpseOfAgathar Год назад

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

@LowCountryHarleyDavidson Год назад

A built up Sportster👍

@CorpseOfAgathar Год назад

@@LowCountryHarleyDavidson thank you!

@davebarnessr.5805 2 года назад

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

@mobkinq Год назад

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 Год назад

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

@markgaston3824 3 года назад

Hey Doc Harley I'm going to repeat someone else's post here I never did hear an answer to the question a yes or no so which is it?

@grimeyhonkyracing3938 3 года назад

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

@user-gc9yr1be6r 6 месяцев назад

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 6 месяцев назад

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

@PincheBuzo 2 месяца назад

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

@LowCountryHarleyDavidson 2 месяца назад

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

@jomar284 2 года назад

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 года назад

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

@allenhale2316 2 года назад

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

@LowCountryHarleyDavidson 2 года назад

It does not help...Doc

@xxwafflecone 2 года назад

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 года назад

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

@louisclemento9982 4 года назад

Will part 2 actually answer the question?

@The_Post-apocalyptic_Few 4 года назад

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

@BGPD70 2 года назад

Yes or no?

@mikewatkins34 2 года назад

So I'm kind of slow did he ever say if it was bad or not?

@djmorgan8783 2 года назад

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

@69littletoy 7 месяцев назад

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 месяцев назад

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

@user-nf6en6wt1r 4 года назад

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 года назад

Take a look at this video: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-Hc6Ihy82LDo.html

@rebel_ltz 4 года назад

Nothing. Belt is superior.

@inmate666 4 года назад

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 года назад

@@inmate666 ok it is a reason, thanks.

@inmate666 4 года назад

@@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.

@rgh622 4 года назад

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 года назад

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 года назад

@@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.

@MrMGutierrez84 8 месяцев назад

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

@LowCountryHarleyDavidson 8 месяцев назад

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

@357coonan9 2 года назад

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.

@theone2be33 4 года назад

What about accel popping?

@satan3090 3 года назад

Will octane change help

@LowCountryHarleyDavidson 3 года назад

No...Doc

@CHEVYK10 3 года назад

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

@daleezzell1385 4 года назад

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 года назад

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

@daleezzell1385 4 года назад

Yes, but I was young and invincible back then!