Valve piston
clutch
Cylinder block,
ring
Brake
Chain
Lack of
power
engine
Spark plug
Intake pipe
Cylinder head
Electrical system
Air filter
cable
Headlight
s and
Left and right
taillights
switch
Valve timing failure
Excessive carbon deposits on intake and exhaust valves and
pistons: poor fuel quality and poor oil quality
Clutch slip: poor oil quality, long use time, overload
Cylinder block and piston ring wear: poor oil quality, long use time
Brake separation is not complete: the brakes are too tight
Chain too tight: improper adjustment
Engine overheating: The mixture is too rich or too thin, and the
quality of oil and fuel is poor.
There are obstructions etc.
Improper spark plug gap, normal 0.8-0.9 mm
Air intake pipe leak: use time is too long, adjust or replace
Cylinder head or valve leak
The electrical system is faulty
Bad line connection
Poor contact or damage to the switch
80
Check or replace
Repair or replace
Adjust or replace
Change the oil
Adjustment
Adjustment
Adjust or replace
Adjust or replace
Adjust or replace
Check or replace
Check or repair
Clean or adjust
Adjustment
Adjust or replace