I have a 2001 Yamaha Raptor 660 that runs normal at idle, but as soon as I open the throttle it backfires constantly and has no power what so ever. I have removed and completely tore down and cleaned the carburetors and no fix. This started on its own after I shut it off once, so its not from any particular mod. I was wondering if anyone has had any problem similar to this and if so what the solution was. Thanks

 

bet ya $5 it's the parking brake...

 

Clogged carb or clogged fuel filter would be my guess.

 

e-brake

 

its the parking break

i had my parking brake on with out noticing and when i hit the gas it would backfire and have no power

 

It was the parking brake!!! THANKS

 

best thing to do is pay $10 for a block off plate and get rid of it so it NEVER TROUBLES YOU AGAIN!!!

 

Can't you just unplug it? (By the headlights)

 

Hey dude! I have the same exact problem on my 2001 Raptor 660! It happened just after I tried to adjust my chain b/c there was too much slack then my friend un-hooked my rear brake cable to try to get to the axle bolt easier. So maybe that's what triggered my "e-brake" sensor to engage. Haven't looked at it yet but from what you said it must be the same problem I have.

What exactly did you do to correct the problem?? Please let me know b/c I'm anxious to get it running again...

thanks dude!

e