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9-4-7 TAPPET ADJUSTMENT
Set the tappet at the lowest point and push down the valve.
Measure the clearance between the
valve and the tappet stem, using a clearance gauge inserted into the clearance (See Fig. g-4-12).
Note: When the engine is not running, the clearance between the valve and tappet stem must be
in the range of 0.110.02. This holds true for both the intake valve and the exhaust valve.
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Clearance Gauge
Fig. 9-4-12
Intake Valve ‘a
r Exhaust Valve
Valve Spring
Fig. 94 13
Note: If the clearance is smaller than the specified one, grind down slightly the valve stem tip
with a grinder and measure the clearance again.
If the clearance is larger than the specified allowance, replace the valve with a new one
and adjust the clearance using some compound etc.
Note: Install the valve spring retainers after completing adjustment of the tappet clearance.
Then recheck the clearance.
* Installment of spring retainers
Place the retainer, using a special tool, over
the valve stem with the retainer’s notch
facing towards the front.
Front
9-4-8 BREATHER PLATE AND TAPPET COVER
Note: Pay attention to installing procedure of the gaskets and position of the breather valve,
which should be located in the intake valve side.
9-4-9 CYLINDER HEAD
Before installing the cylinder head, be sure to remove any carbon deposits from the combustion
chamber, and scrape off any dust in the section between the cooling fans.
Also check the level of the cylinder head.
Note: Replace the cylinder head gasket with a new one.
Note: Torque for the cylinder head: 190 % 230 kg-cm
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