My yamaha 660 raptor wont stay running, carbs are clean,new spark plug. starts...

  • Thread starter Thread starter caser1
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caser1

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...fine idols good when warm dies? once it starts getting warm starts to misfire then dies wont start till you let the thing get cold
 
Idol is a show on TV. Idle is what a bike engine will do.
I would suspect a head gasket letting go. Do you have the ability to perform a compression test?
 
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