3-3
MOTOR
MOTOR
ADJUSTING THE VALVE CLEARANCE
The following procedure applies to all valves.
NOTE:
Adjusting the valve clearance should be done
with the engine cold at room temperature.
When you measure or adjust the valve
clearance, the piston must be at top dead
center (TDC) in the race
1.
Remov
e: Seat
Refer to "GENERAL CHASSIS" on page 4-1
Fuel tank
Refer to "GENERAL CHASSIS" on page 4-2
2. Disconnect
Hose air induction system Refer to "AIR
INDUCTION SYSTEM" on page 6-9
3. Remove:
Head cover
Gasket head cover
See "HEAD" on page 5-5
4. Remove:
Screw access time to the mark "1" to access the end screw
of the crankshaft "2"
1
2
5. Measure:
Valve clearance
OOS
Adjust
Valve clearance
(Cold)
Admission
0.08 to 0.12 mm
Exhaust
0.12 to 0.16 mm
a. Rotate the crankshaft in the opposite direction of the
b. When the piston is at top dead center (TDC) of the
compression stroke, align the "a" in the magnet with
the fixed point "b" of the magneto cover.
b
to
c. Verify that the camshaft lobes are positioned as
shown in the illustration.
NOTE:
In this position, both valves must be some clearance
d. Measure the valve clearance with a feeler gauge
"1".
OOS
Adjust
1
6. Fit:
Valve clearance
a. Loosen the locknut "1".
b. Insert thickness gauge "2" between the end of the
adjustment screw and the valve tip.
