2001 Yamaha YFM660 Raptor Factory Service Manual, Page 281Get this manual

2001 Yamaha YFM660 Raptor Factory Service Manual, Page 281

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CARBURETORS Remove

the carburetorInspect the valve seat and needle valveIf either is worn, replace them bothIf both are fine, adjust the float level by bending the float tang slightlyInst