Popping on decel is a sigh of a lean fuel mixture, with FI a remap is your only option
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Crashed my track only 944 Ducati hard enough that it needed new exhaust.All the other damage was bodywork and controls.It had a pair of really big Akra's on it before and didn't backfire or pop when downshifting.Now with a pair of Remus cans installed,it pops with every downshift.(only a run up and down my street).It's fuel injected,so i don't think anything could have changed.Could a slightly more restrictive exhaust cause this?Do i need an expensive dyno session now to remap?
"If ya want me,I'll be in the bar"
Ric Waterloo
1800 Goldwing
2009 1100S Hypermotard (for sale)
944 Ducati track the "Blueberry Muffin"
Popping on decel is a sigh of a lean fuel mixture, with FI a remap is your only option
check for exhaust leaks. if all thats changed is the cans then might have a leak somewhere in the system
With the R6 peeps, when they change the factory exhaust they get LOTS of pop, gurgle and backfire on deceleration! If the bike has a fuel management computer (i.e. power commander) or a reflashed ECU adding extra fuel on the deceleration section seems to help a lot:
http://www.youtube.com/watch?v=FI4djEs1Cws&hd=1
Does your bike have a "smog" system, fresh air injection system, PAIR, AIS, etc.!? Usually plugging that up so it can't suck fresh air (or on the R6 we rip out ALL the smog stuff, hoses, AIS pump, etc. then slap on "smog block off plates") will correct all or almost all of the pop and backfire.
I'm not sure what type of options are available for your Duc, never worked on one
-Jamie M.
Scarborough group ride 4.0! Every Sunday, 1:30, Timmies at KC!!! Facebook group!! ^^^ OMG ROFL!!! ^^^
Dress for the crash, not for the ride...
I didn't put any sealant on the can to header joint.That's worth a try.The bike is a retired racebike with no smog stuff other than the crankcase breather that dumps into the airbox.No p.c. on it.I assume that the ecu can be remapped.I just don't have $400 to spend on dyno time.
"If ya want me,I'll be in the bar"
Ric Waterloo
1800 Goldwing
2009 1100S Hypermotard (for sale)
944 Ducati track the "Blueberry Muffin"
If you had a exhaust leak you would hear it on acceleration\under laod
My bike does it all the time. I do know it's jetted a bid lean on the low speed circuit. Fine with me, it's not really harmfull in any way.
Took the cans off and sealed them with Permatex copper sealant.Couldn't take it out for a quick one down my street today tho.Saw a few cops around.
"If ya want me,I'll be in the bar"
Ric Waterloo
1800 Goldwing
2009 1100S Hypermotard (for sale)
944 Ducati track the "Blueberry Muffin"
Scarborough group ride 4.0! Every Sunday, 1:30, Timmies at KC!!! Facebook group!! ^^^ OMG ROFL!!! ^^^
Dress for the crash, not for the ride...
I think i got it at crappy tire.But it was about 8 years ago.Surprised it was still good.
"If ya want me,I'll be in the bar"
Ric Waterloo
1800 Goldwing
2009 1100S Hypermotard (for sale)
944 Ducati track the "Blueberry Muffin"
Scarborough group ride 4.0! Every Sunday, 1:30, Timmies at KC!!! Facebook group!! ^^^ OMG ROFL!!! ^^^
Dress for the crash, not for the ride...
Leaking at the can/pipe junction is NOT going to make it "pop" on deceleration.
Leaking at the head/pipe junction will.
Found a big parking lot this morn to get thru 1st and 2nd.It only pops with a completely closed throttle.I wonder if just turning in the air bleeds a 1/2 turn will richen it up enough? It only pops once when i close the throttle,but it's very annoying and it never did it before i crashed it.
I guess it could be a tiny leak at the head junction tho.The only way to find out is to totally remove the system and put new gaskets in i think.
"If ya want me,I'll be in the bar"
Ric Waterloo
1800 Goldwing
2009 1100S Hypermotard (for sale)
944 Ducati track the "Blueberry Muffin"
Leak where the header joins to the cylinder head. Most bikes have a compressible copper gasket that goes in there, which you are supposed to replace.
FWIW, popping on deceleration is not something that warrants remapping or rejetting on its own account. Driveability issues warrant remapping/rejetting. If popping on decel is a side effect, so be it.
"If ya want me,I'll be in the bar"
Ric Waterloo
1800 Goldwing
2009 1100S Hypermotard (for sale)
944 Ducati track the "Blueberry Muffin"
have you looked over the little things like airbox being on properly....exhaust joints being joined up properly.
Persoanlly my 636 used to run WAY too rich when I acquired it...with a full length ARKA can it used to shoot flames on decel.....now with a fuel management system, and even with a stubby akro can it runs smooth....better fuel economy...no flames and no popping.
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