popping on decel
09-20-2006 | 08:21 AM
#1
Thread Starter
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Squid
Joined: May 2005
Posts: 59
From: WV
popping on decel
So I have just added a set of two bros. Upon decel I have a little pop crackle not alot, but still there. I only have 4k on it and want it to last a long time. Im wondering if I can cause any issues on valves and such with not jetting. Again, my mileage is not worse except for wanting to hear the new rumble and the pop can be controlled by not letting it iddle to low while deceling. I asked the local dealor about it and they said one should expect that with any aftermarket exhaust.
What do you guys think???
What do you guys think???
09-20-2006 | 08:54 AM
#2
Member
Squid
Joined: Aug 2006
Posts: 74
any aftermarket pipe on the SH without jetting and without disabling the PAIR will almost certainly pop and crackle on deceleration. As for ruining valves or any further internal damage I think you are pretty safe. I'd disable the PAIR (i have yet to do that but it's on my list) if the noise is bothering you, rejet for a better mixture - and ride on!
good luck with it.
good luck with it.
09-20-2006 | 10:24 AM
#6
Senior Member
SuperBike
Joined: Sep 2005
Posts: 1,572
From: Buffalo, NY
Running a lean mixture can do damage, I would suggest getting it rejetted soon.
Originally Posted by DBERN
I m not worried about the noise as long as I can do no damage in the long run. Ill look into the pair system.
thanks
thanks
09-20-2006 | 11:21 AM
#7
Thread Starter
Member
Squid
Joined: May 2005
Posts: 59
From: WV
well that is the question of the the hour then. Is it the Pair system making it pop no matter what or is it because it is running rich that it is popping?? Or both? The pair is going to put that oxygen in there to burn any extra fuel right?
What acutally causes the damage the pop or the heat from it, and where would that damage be.
What acutally causes the damage the pop or the heat from it, and where would that damage be.
09-20-2006 | 08:38 PM
#8
Administrator
World Champion
Joined: Dec 2004
Posts: 105,287
From: Fulton, MO
Any damage that will occur will be from running lean, but you'd have to be very lean and run it that way for a long time to burn a valve. The popping on decel is from PAIR, and will only cause accelerated degradation of muffler packing and hotter exhaust, since combustion is taking place there.
09-20-2006 | 08:46 PM
#9
Moderate-whore
MotoGP
Joined: Nov 2005
Posts: 9,049
From: Leander TX!!
Dang, I need to get that done then, I can't stand any more accelerated degradation.... I mean the rash was bad enough...LOL
So what is a far price to pay for those little covers? Say $20 or so....??
So what is a far price to pay for those little covers? Say $20 or so....??
09-21-2006 | 09:27 AM
#11
Thread Starter
Member
Squid
Joined: May 2005
Posts: 59
From: WV
Originally Posted by SPRHK
I added a FACTORY TI-PRO jet kit. I also have 2 Bros. exhaust. With the jetting that they suggest, I dont have any "popping' or "crackling" from my exhaust.
09-21-2006 | 06:36 PM
#13
Junior Member
Squid
Joined: Aug 2006
Posts: 24
From: Neenah,WI
i have devil high mount with the factory 1.7 jet kit, my air fuel is right on the money(ive spent the last week on the dyno at work).i still get a little popping on high rpm deccells.my pair system is removed(i just flipped them over and removed the other junk).i have never seen any great improvements from anyone on modifing the airbox(no disrespect to anyone!).
09-22-2006 | 06:34 PM
#14
Senior Member
Back Marker
Joined: Aug 2006
Posts: 155
From: in front of you
Originally Posted by PHPERFORMANCE
i have devil high mount with the factory 1.7 jet kit, my air fuel is right on the money(ive spent the last week on the dyno at work).i still get a little popping on high rpm deccells.my pair system is removed(i just flipped them over and removed the other junk).i have never seen any great improvements from anyone on modifing the airbox(no disrespect to anyone!).
09-23-2006 | 05:35 AM
#17
Senior Member
Superstock
Joined: Dec 2005
Posts: 428
Originally Posted by 98vtr1000
not to hijack - but on a side not. With factory jetting and aftermarket slip ons, will the bike generally run rich or lean with factory carb settings.?
09-23-2006 | 08:14 AM
#18
Junior Member
Squid
Joined: Aug 2006
Posts: 24
From: Neenah,WI
The Best Thing You Can Do,is Find A Local Shop With A Dyno,and Have Them Do A Load Run To See Where Your Bike Is.at Least You Have A Base Line To Work With(we Only Charge 30.00 For 3 Full Pulls And A Baseline).i Had My Bike On The Dyno For A Week Trying To Get The Big #'s,but That Tune Wont Work For Just Driving.i Have 182f/185r Jets,needle On 4th Notch With Shim,2.5 Turns Out On The Screws,and 45 Pilots-so It Will Idle.the Bike Still Makes 111hp To The Wheel And Its Driveable.
09-23-2006 | 10:03 AM
#19
Senior Member
Back Marker
Joined: Aug 2006
Posts: 155
From: in front of you
Originally Posted by PHPERFORMANCE
The Best Thing You Can Do,is Find A Local Shop With A Dyno,and Have Them Do A Load Run To See Where Your Bike Is.at Least You Have A Base Line To Work With(we Only Charge 30.00 For 3 Full Pulls And A Baseline).i Had My Bike On The Dyno For A Week Trying To Get The Big #'s,but That Tune Wont Work For Just Driving.i Have 182f/185r Jets,needle On 4th Notch With Shim,2.5 Turns Out On The Screws,and 45 Pilots-so It Will Idle.the Bike Still Makes 111hp To The Wheel And Its Driveable.
09-23-2006 | 12:39 PM
#20
Junior Member
Squid
Joined: Aug 2006
Posts: 24
From: Neenah,WI
we had a 2005 rc51 at work with a 2inot1 jardine on it.he lost 5hp with the 2 into 1 and we spent hours on the dyno trying to get it back-didnt happen.it did run alot richer with that system on it, it doesnt scavange as well.just like you loose hp with the high mounts.im not knocking 2 into 1's,they look awsome.they just dont tune as easy.
09-23-2006 | 10:11 PM
#21
Administrator
World Champion
Joined: Dec 2004
Posts: 105,287
From: Fulton, MO
An old buddy of mine in VA had an '02 RC51 with the Jardine 2-1. I had an '02 RC51 with Harris pipes. He made 0.5 hp less than I did. Pissed me off actually because he paid like $450 for his pipe and me about $950. Still, we were making about 10hp more than stock, so it was all good.
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