ZHEJIANG KAYO MOTOR CO., LTD.
63
The valve stem is over
worn
The
fitting
clearance
between the valve stem
and the valve guide is
too wide
.
Sound of valve leakage, Thick
blue and white fume form the
exhaust muffler pipe
.
Replace the valve
The valve stem is
deformed
It is impossible to close
the valve completely
.
The engine starts hard or fails
to star
Replace the valve
Valve spring
The spring is ineffective
or fractured
It is impossible to fit the
valve and the valve seat
tightly.
The engine starts hard or fails
to star. Sound of the cylinder
head.
Replace the valve
spring
6.6 Disassemble, assemble and maintain carburetor (it’s not adjustable
in EPA state)
Dismantle
the
fixing
bolt
of
carburetor and circlip of air cleaner.
Remove the carburetor .Remove and
clean throttle cap.
Clean the carburetor as follows:
Remove the dirt and clean inner oil
way.Dismantle the fixing bolt of float
chamber cap.
Remove the float chamber cap.
Remove the water and debris in the
cap if necessary. Check the state of
seal ring and replace if it is aging
