ds650 back fires,idles perfectly but as soon as i hit the gas it just backfires.if i hit the throttle slowly i can get it to rev up but its the quick pumps when it backfires. i did install a pro circuit exhaust k&n air filter outerwears air box lid and a ron woods cdi.i have not rejetted,is that the problem?or should i worry about something else.i have the jet kit just dont know how to rejet.ill have to take it to the mechanic for that.i also have a 15 tooth sprocket that i need to install,should i do this after or before rejetting? or does it matter?thanks in advance

 

WOW 48 views and no help

 

yes u need to re jet it because u have more air coming in and your new exhaust system is flowing better too. u should be fine with or with out the sprocket.

 

yup, you definately need to rejet quick! The new power you're gona feel is awesome!

 

hell yeah cant wait!!! my buddy big c recommended ct racing for the rejetting he says they put it on a dyno to rejet to perfection.gonna take it very soon!! thanks for the replies

 

yup, it's lean, mine was doing that this morning when the accelerator pump wasn't working.