KAYO MOTOR FOX 70, Service Manual

Page: 69 / 105

ZHEJIANG KAYO MOTOR CO., LTD.
WWW.RIDEKAYO.COM
69
cover and replace if necessary
.
Troubleshooting of crankcase, please refer to the following table.
Description Problem
Trouble
Compucation Correction
Crankcase
Crack in the crank case
Oil leakage from the
crankcase
Repair or replace the
crankcase
Oil leakage from the
joint of left and right
crankcase
The crankcase gasket is
worn out
Replace the gasket
The threaded hole of oil
drain plug screw is
ineffective
Oil leakage from the
threaded hole of plug
screw
Repair of replace the
crankcase
The threaded holes of
cylinder bolt are
ineffective
Cylinder head retaining
nut is impossible to
screw up firmly,
resulting in air leakage
between the cylinder
head and cylinder
The engine starts hard or
fails to start. Insufficient
engine output; Engine
speed changes during
idle run
Repair the threaded or
replace the crankcase
The bolt of the cylinder
is broken
The same as front The same as front Replace the cylinder bolt
The oil seal is damaged
or the oil seal edge is
damage/worn/aged
Oil leakage is ineffective
Oil leakage from the oil
seal
Replace the oil seal
Right crankcase
cover
The right crankcase
cover is worn or cracked
Oil leakage form the
case cover
Repair or replace the
case cover
The gasket of right
crankcase is broken
Oil leakage between
the case cover and the
case
Replace the gasket
Left crankcase
cover
The left crankcase cover
is worn or cracked
Oil leakage form the
case cover
Repair or replace the
case cover
The gasket of left
crankcase is broken
Oil leakage between
the case cover and the
case
Replace the gasket