Fuel System; Electrical System - Yamaha YSR50T Service Manual

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POOR MEDIUM AND HlGH SPEED PERFORMANCE
SHTG
POOR MEDIUM AND HlGH SPEED PERFORMANCE
FUEL SYSTEM PROBABLE CAUSE
I"'
t a n k '
.Clogged fuel filter
Deteriorated fuel or fuel containing water
or foreign material
Clogged air passage (Fuel tank cap)
t
Fuel cock .Clogged fuel hose
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.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
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.Clogged or loose main nozzle
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Carburetor
ELECTRICAL SYSTEM PROBABLE CAUSE
Spark plug .Improper plug gap
.Worn electrodes
*Wire between terminals broken
.Improper heat range
.Faulty spark plug cap
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L-
C.D.I. unit system
.Faulty C.D.I. unit
*Faulty source coil
.Faulty pick-up coil
I -
Air cleaner
.Clogged air filter