KEEWAY RK V125 C User Manual page 143

Valve piston
clutch
Cylinder block, ring
Brake
Lack of Chain
power
engine
Spark plug
Intake pipe
Cylinder head
Electrical system
Cylinder, piston, piston ring failure: the fuel contains gum or wear
Air intake pipe leak: use time is too long
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
67
Check or replace
Check or replace
Check or replace
Repair or replace
EN
Adjust or replace
Change the oil
Adjustment
Adjustment
Adjust or replace
Adjust or replace
Adjust or replace
Check or replace
Check or repair