660 raptor starting problems

[Dan Surett]

i have a 2001 raptor 660r. it is having problems starting. sometimes the only way it will start is by taking the air filter out and putting your hand over the right side carb. but once it is running it starts right up.every thing on it is stock.

[blasterdude14]

did u check the spark plug? also play around with the air fuel screw on the carberator it may be starving for air.

[Dan Surett]

yes i have checked the spark plug. i change it often but it dosent help. and once its running its fine until it cools down.

[blasterdude14]

wasnt that the year that had the tranny problems? have you talked to yamaha about this. the only thing i think it could be would be the carbourator.

[Freak]

I'd check the valve clarence.

[Dan Surett]

yes that is the year they had the tranny problems but it wasnt with all of them. i took the carbs off and cleaned them but it didnt seem to help. what plug should i use. im using the stock plug. should i use a hotter one or what. And how do i check the valve clearence

[raptor02]

If I remember right the right side carb is the primary carb for the raptor. I know you said that you cleaned the carb but did you take carb cleaner and spray down through all of the holes that the jets screw into to make sure that no gas is gummed up in it. also check to make sure that your choke is working right. Or the best solution is to get rid of the crapy factory carb and get an Edelbrock carb. Best purchase I made for my 02 Raptor. Hope you get it fixed


Mark