I just got done replacing the one way starter clutch in my 2002 yamaha raptor 660. It cranked up fine, and it idles fine, but when you open the throttle it starts to pop really bad and it just kinda bogs down. I put a new plug in and the same thing happened. Does anyone know what the problem is?

 

parking break limiter, follow the wire coming from the parking break pearch about 8 inches right behind the radiator and disconnect it, or you can get the kit, check raptortranny.com good luck!