My baby is backfiring ...

[banditoo]

when I roll off the throttle aggressively, the bike backfires sometimes now, been doing it for a few weeks ...

the bike is a fuelly so it's obviously not a carburetor issue ...

I don't know much about ignition systems on bikes, I would assume my '02 is electronic ignition ? i.e. no points ? So there wouldn't be anything to adjust.

what do you guys think would cause backfiring ? It's not bad fuel, I've been using the same fuel forever .. I'm thinking I need new plugs, I've got 25K on my original ones ??

ideas would be appreciated !!

Thanks Chris !!

 

[Addicted to torque]

if you haven't done any mods to the fuel system ( map, exhaust, air filter,etc...) I would definetly check the plugs to see what kind of shape they are in. if I am correct and backfiring is caused by unburnt fuel igniting on the other side of the combustion chamber, faulty plugs could be the culprit(not firing hot /clean enough to ignite the mixture. otherwise you have some thing that is causing a rich situation in your engine.

Disclaimer. - I am not a mechanic. just a hillbilly that ownes some wrenches.

so let anyone chime in and call me a dumb dumb.

 

[1127 TO 1299]

just don't roll off the throttle
just keep on going and going and going.

i have this problem going on and off since I have the D&D bolt ons
it does not really affect me
but i know it can damage the pipe and the exhaust valves

 

[Juggler]

This has recently started happening to me too! I put super gas in, so I'm thinking that may be part of the problem. Next tank will be regular.

Someone else on the board suggested the pair mod (removal).

 

[03busaman]

mine was doing that after the 4 2 1 pipe mod the bike runs lean so i pluged in the tre
and it went away but the power commander will definatly cure it if its not the plugs.

good luck

 

[zukracer]

with a stock exhaust, dunno what to say, the "hillbilly that ownes some wrenches"

probably knows more than me

with aftermarket full system, you need to pull the PAIR system out. I know mine is doing it since I put on a yosh full system but I havent pulled the PAIR yet.....although it does scare the crap outta folks when it backfires when I'm coming to a light

 

[banditoo]

thanks guys, according to the manual I am overdue on air filter and plug replacement, I'll do that first and let ya's know !! thanks guys !!

 

[SHOWSBUSA]

I HAD THE SAME PROBLEM I TOOK OFF THE PAIR VALVE AND PUT ON SOME BLOCK OFF PLATES PROBLEM WENT AWAY.

 

[UR IT!]

I have the same problem too! I attribute it to the mod I did to the stock exhaust( i.e. drill holes in the rear ), but it didn't start until about a week ago, and getting worse. I've got about a week or so until I change to a full Hindle system so I guess I'll just leave it til then...

Dan