3-28 ENGINE
• Install the valve spring retainer by pressing down the spring
using the valve lifter. Fit the cotter halves to the stem end and
release the lifter to allow the cotter
1 to wedge between the
retainer and the valve stem. Make sure that the rounded lip
2
of the cotter fits snugly into the groove
3 in the stem end.
& 09916-14510: Valve spring compressor
09916-14910: Attachment
09916-84511: Tweezers
"
CAMSHAFT/AUTOMATIC DECOMPRESSION
ASSEMBLY
"
AUTOMATIC DECOMPRESSION
Move the automatic decompression weight by hand to inspect if
it is operating smoothly. If the automatic decompression weight
does not operate smoothly, replace it with a new one.
CAM WEAR
Worn-down cams are often the cause of mistimed valve opera-
tion resulting in reduced power output.
Measure the cam height
H using the micrometer. If the cams
are worn to the service limit, replace the camshaft with a new
one.
& 09900-20202: Micrometer (25 – 50 mm)
% Cam height
H
Service Limit
IN: 36.020 mm (1.4181 in)
EX: 34.900 mm (1.3740 in)
Be sure to install all of the parts in their original posi-
tions.
Do not attempt to disassemble the camshaft/auto-
matic decompression assembly. It is not serviceable.
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