1988-2006 Yamaha ATV YFS200 Blaster service manual PDF download file., Page 228Get this manual
POOR MEDIUM AND HIGH SPEED PERFORMANCE POOR MEDIUM AND HIGH SPEED PERFORMANCE FUEL SYSTEM
TRBL SHTG
PROBABLE CAUSE
Clogged fuel filter Deteriorated fuel or fuel containing water or foreign material Clogged fuel breather hose fuel hose Deteriorated fuel, fuel containing water or foreign material Sucked-in air Deformed float Groove-worn needle valve Improperly sealed valve seat Improperly set clip position of jet needle Improperly adjusted fuel level Clogged or loose main jet -clogged or loose main nozzle