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2001 Yamaha Raptor 660R Misfire


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I'll give that a shot thanks alot... my mechanic that used to fix my bike has left so wasnt too sure what tools worked... Um my bike didnt come with a manual are u able to tell me how to check the fuel flow? wen im ridding i make sure the tap is on all the time... ive changed the filters incl air and i had a new carb kit fitted but cudnt get the plug out to get another one.

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Hey Indykwg,

yea it does that in third and above i have the digital display on mine it gets to abt 3 on the rev counter then i change... i tired the throtle at about 3/4 and its like its starving for power or something then i open it fully and it still kind of jerks and like misses but if i drop all the way to first it somehow feels like it kick starts again and it rides fine.

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  • 2 weeks later...

Sounds like you are running out of fuel in the bowl, maybe an improperly adjusted float. Could be that the carb needs to be cleaned out as well. The other possibility I see is that the CDI or pickup coil could be malfunctioning. Couldn't hurt to check the valve clearance, compression and timing chain as well. At any rate, definately change the plug first, and look at the color of the insulator on the old plug, the condition of the spark plug can be a good indicator of your problem.

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