2000 RSV started to backfire when deccelerating

[lobo17]

When I down shift my cycle backfires at times. The choke is pushed in all the way and for a bike that is nine years old it runs great. Any suggestions on fixing this problem? I had never had any problems until now.

 

Thanks

[Monty]

Sounds like it is leaning out for one reason or another.

 

Any exhaust leaks up close to the engine?

[V7Goose]

99% chance you have a vacuum leak. Replace the rubber caps on the intake manifold nipples and all will probably be instantly OK. This issue has been discussed at great depth in many threads here in case you want more info. It is generally very easy to fix.

 

You are close to me - bring it over and we'll get it all fixed and tuned up nice.

Goose

[BradT]

When mine does that I sync the carbs and it normally goes away, except for when I was running in the mountains out west.

 

Others have plugged or removed the AIS system. I think Al Bates had a right for it a long time ago

 

BRad

[Beau-Kat]

Could be air getting into the exhaust somewhere. Oxygen in there helps to ignite unburned fuel/fumes causing backfire.

 

Mine was doing it.

 

Disconnected and plugged the AIS. No more backfires.

[midnightventure]

Mine also quit doing that after carb synch.