Part IV Wiring Diagram
27
2)
Cylinder head
The bottom of the intake valve is marked IN and the bottom of the exhaust valve is marked EX. Please
confirm it carefully before assembly. If the cylinder head is assembled on the cylinder, the spring retainer
may fall into the cylinder, which should be noted.
3) Inspection/maintenance/adjustment:
①
Valve spring retainer:
Move the front end of the valve stem longitudinally in
the central hole of the spring retainer and remove it.
If the cylinder head is assembled on the cylinder, the
spring retainer may fall into the crankcase, which
should be noted.
②
Outer diameter of valve stem
Use a micrometer to check the outside diameter of
valve stem. If the diameter is lower than standard or
exceeds the maintenance limit, or the valve surface has
visible ablation or cracks, replace it with a new valve.
Valve locking screw
Valve rocker arm shaft
Valve rocker
arm shaft
Valve gutter
Cylinder head assembly
Valve spring
Exhaust valve spring retainer
Oil deflector
Intake valve
Exhaust valve
Apply oil first
during installation
Apply oil first during
installation
When disassembling the valve spring seat, press it down and then push the retainer
up to take it out.
Valve adjustment nut
Valve spring seat
