Honda HHT25S Manual page 96

HHT25S•HHT35S
2. CYLINDER BLOCK / VALVES
DISASSEMBLY & REASSEMBLY
1. Remove the cylinder head cover and cam pulley
2. Remove the lower crankcase
3. Remove the crankshaft
VALVE SPRING RETAINER (2)
REMOVAL:
Push down and slide the retainer to the
side, so the valve stem slips through the
hole at the slide of the retainer.
Do not remove the valve spring retainers
while the lower crankcase is installed, or
the valves will drop into the cylinder.
VALVE SPRING (2)
(Whole surface)
INTAKE VALVE LIFTER
REMOVAL/INSTALLATION:
P. 9-11
Do not interchange with the
exhaust valve rocker arm.
Do not reuse after removing.
Do not reuse
Viewed from recoil
starter side. after removing.
EXHAUST VALVE LIFTER
REMOVAL/INSTALLATION:
P. 9-11
Do not interchange with the
intake valve rocker arm.
Do not reuse after removing.
Viewed from recoil
starter side.
INTAKE VALVE (Sliding surface)
INSPECTION:
Viewed
INSTALLATION:
from the
Do not interchange with the
back side.
exhaust valve.
CRANKSHAFT / PISTON / VALVES / CYLINDER BLOCK
(P. 8-1, P.
(P. 8-5, P. 8-11).
(P. 9-1).
VALVE STEM SEAL
(Intake valve only)
P. 9-9
8-7).
EXHAUST VALVE (Sliding surface)
Viewed from the INSPECTION:
INSTALLATION:
back side.
Do not interchange with the intake
valve.
Before installation, remove the carbon
deposits and inspect the valve.
INTAKE VALVE
ROCKER ARM
REMOVAL/INSTALLATION:
P. 9-11
Do not interchange with the
exhaust valve rocker arm.
Do not reuse after removing.
Viewed from
clutch side.
SPARK PLUG
11.8 N·m (1.2 kgf·m, 8.7 lbf·ft)
ADJUSTING SCREW (2)
ADJUSTING SCREW
LOCK NUT (2)
4.9 N·m (0.50 kgf·m, 3.6 lbf·ft)
EXHAUST VALVE
ROCKER ARM
REMOVAL/INSTALLATION:
P. 9-11
Do not interchange with the
intake valve rocker arm.
Do not reuse after removing.
Viewed from
clutch side.
P. 9-9
9-5