2008 Yamaha Raptor 250SE / 250SE2 Factory Service Manual, Page 303Get this manual

2008 Yamaha Raptor 250SE / 250SE2 Factory Service Manual, Page 303

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STARTING FAILUREHARD STARTINGPOOR IDLE SPEED PERFORMANCEPOOR MEDIUM AND HIGH-SPEED PERFORMANCE COMPRESSION SYSTEM Cylinder and cylinder head Loose spark plug Loose cylinder head or cylinder Broken cyl