Inspections/Adjustments
3-6
Loosen the lock nut with a valve wrench, and set
valve clearance to a prescribed level by turning the
adjusting screw with a valve adjusting wrench.
After setting clearance to the prescribed level, hold
the adjuster screw with a valve adjusting wrench,
and tighten the lock nut.
Torque values: 1.1kg-m(11N.m,8ft-lb)
Tools: Wrench 8
××
9mm
Adjusting wrench B
Measure the valve clearance again.
Install the cylinder head cover and tighten the bolts.
Torque values: 1.0kg-m(10N.m. 7ft-lb)
Cylinder Compression Pressure
Start and warm up the engine.
Remove the plug maintenance cover.
Stop engine, and remove the spark plug cap and
spark plug.
Install a compression gauge.
Open the throttle completely, and crank the engine
with the starter motor until the gauge reading
rising.
Tool: Compression gauge
NOTE
Compression pressure: 13.8kg/cm
2
If the pressure is low, check the following:
- Inadequate valve clearance adjustment
- Valve leakage
- Leakage from the cylinder had gasket
- Piston / cylinder worn
If pressure is high, check the following:
- Carbon deposits on the piston head, and cylinder
head.
Carburetor Idling
NOTE
The maximum reading is usually reached within
4~7 seconds.
Verify all engine adjustments satisfy
specifications. Make adjustments, if necessary.
Heat the engine to make accurate idling inspection
and adjustment. Stand the vehicle on the main stand.
Turn the throttle stop screw and make adjustments
to prescribed idling speed.
Feeler gauge
Adjusting
wrench
Spark plug cap
Compression gauge
Throttle Stop Screw
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