3 - 11
CHK
ADJ
ADJUSTING THE VALVE CLEARANCE
EAS00048
ENGINE
ADJUSTING THE VALVE CLEARANCE
The following procedure applies to all of the
valves.
NOTE:
_
•
Valve clearance adjustment should be made
on a cold engine, at room temperature.
•
When the valve clearance is to be measured
or adjusted, the piston must be at top dead
center (TDC) on the compression stroke.
1. Remove:
•
storage box
Refer to
“
RIDER SEAT AND STORAGE
BOX
”
.
2. Remove:
•
V-belt case air filter cover
1
•
V-belt case air filter element
1
3. Remove:
•
timing plug
•
spark plug
•
rubber sheet
1
•
cylinder head cover
2
•
cylinder head cover gasket
1
2
4. Measure:
•
valve clearance
Out of specification
→
Adjust.
▼▼▼
▼
▼ ▼▼▼
▼
▼ ▼▼▼
▼
▼ ▼▼▼
▼
▼ ▼▼▼
▼
▼ ▼▼▼
▼
▼▼▼
a. Turn the primary sheave nut on the left side
of the crankshaft counterclockwise to turn
the crankshaft.
b. Align the
“
I
”
mark
a
on the generator rotor
with the stationary pointer
b
on the genera-
tor rotor cover to position the piston at TDC
on the compression stroke.
Valve clearance (cold)
Intake valve
0.15 ~ 0.20 mm
(0.0059 ~ 0.0079 in)
Exhaust valve
0.25 ~ 0.30 mm
(0.0098 ~ 0.0118 in)
Downloaded
from www.ScooterTime.net