Ive got a 01 yamaha blaster. Bottom & top end were rebuilt last spring. Cylinder is bored out .5. After rebuild it seems to miss out at full throttle. Runs fine during idle and 1/2 trottle. When at full throttle after a bit it starts to cut out and as long as I slow back down to 1/2 it will run just fine. Could it be jetting? Pulled carb all apart and blew out all jets, everything still clean. Not sure where to go with this next. Please help!

 

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Throw a new plug in it and double check your grounds. Sounds like it might be a bad coild or stator. CDI and voltage regulator should be fine.

 

Put in new plug. Same problem. checked grounds an seem to be tight. Plug did look a little rich. Have not done stator or coil yet, just wanted to make sure it wasn't anything else.

 

I'd replace the coil next.

 

May want to read the ohms on the plug resistor [spark plug boot] on the end of wire first! This the most over look part in my town!If bad it could cause your problem!