1987-2009 Yamaha ATV YFM350X Warrior Raptor Service Manual, Page 262Get this manual
POOR IDLE SPEED PERFORMANCEPOOR MEDIUM AND HIGH SPEED PERFORMANCE POOR IDLE SPEED PERFORMANCE POOR IDLE SPEED PERFORMANCE
Carburetor
ISTHRTBGL I
PROBABLE CAUSE
-Improperly returned starter plungerClogged or loose pilot jetClogged pilot air jet -Improperly adjusted idle speed (Throttle stop screw) -Improperly adjusted throttle cable playFlooded carburetorFaultyFaultyFaultyFaultyFaulty battery spark plug COl unit pickup coil ignition coil