Noise from piston ① Piston worn out
② Cylinder worn out
③ Carbon gathered in firebox
④ Piston pin or pin hole worn out
⑤ Piston ring or ring notch worn out
Change
Change
Clean
Change
Change
Noise from chain
of circulation
① Chain elongated
② Chain worn out
③Adjustor of chain problem
Change chain & sprocket
Repair & Change
Noise from clutch ① Spline of crankshaft damaged
②Spline of clutch damaged
Change crankshaft
Change clutch
Noise from
Crankshaft
① Bearing noise
②Needle bearing damaged
③ Gap too big
Change
Change
Change
Noise from CVT ① Belt loose or worn out
② Roller or main wheel damage
Change
Change
Noise from
transmission
system
① Gear damaged
② Input and output shaft damaged
③ Bearing worn out
④ Bush worn out
Change
Change
Change
Change
Gasoline
engine lacks
power and
accelerating
Clutch skiding
1.Fuel system
happens
malfunction
①Octane number is too low
②Oil routine is blocked and oil supply
is not smooth
Change with gasoline
whose Octane number
accords with regulation
Clean oil routine
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