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NOTE: The tappet adjusting tool is fastened
to the cylinder head using one
such as one used t o install the cylinder head
cover. Make sure that the tool contacts the
lifter only, and not the pad.
CAUTION: If th e cam lobe touches th e tappet
adjusting tool, th e stress may fracture the
cylinder head. DO N O T A L L O W TH E C A M
T O CO NTAC T TH E TAPPET ADJUSTING
TOO L.
4. Carefully rotate the cam
be removed. To avoid cam touching adjusting
tool, tu rn cams as follows: (view f r o m left
side o f machine)
Intake: Carefully rotate CLOCKWISE.
Exhaust: Carefully rotate COUNTERCLOCK-
WISE.
5. Remove the pad fro m the lifter. There is a
slot in the lifter. Use a small screwdriver or
other blade and a magnetic rod to remove the
pad. Note the number on the pad.
6. Proper pad selection is made as follows:
(Use appropriate chart fo r exhaust o r intake
valves.)
a. Fi n d number o f original (installed) pad num-
ber on chart. Read d o w n on chart.
b. Find measured valve clearance (fr om step 1)
o n chart. Read across.
c. A t the intersection of installed pad number
(down) and measured clearance (across) is a
new pad number.
( 1 ) allen screw
so that the pad can
EXAMPL E: Exhaust valve,
Measured
New pad number:
NOTE: The new pad number is to be used as
a guide only. Verify the correctness o f this
choice in the following steps).
Install the new pad in the lifter. Install the
7.
pad w it h the number down.
8.
Remove tappet adjusting to ol.
9.
T u r n crankshaft to rotate cam several rota-
tions. This w il l set the pad in the lifter.
10. Check valve clearance (step 3). I f clearance is
incorrect, repeat preceding steps until proper
clearance is obtained.
11. Inspect head cover gasket. If bent o r torn,
replace gasket.
12. Reinstall removed parts
H. Compression Pressure Measurement
Insufficient compression pressure w il l result in per-
formance loss and may indicate leaking valves o r worn
o r damaged rings.
Procedure
1. Make sure valve clearance is correct.
Warm up engine 2-3 minutes. Stop engine.
2.
3.
Remove spark plugs.
4. Install compression check gauge.
installed pad:
No. 250 (read down)
clearance:
(read across)
(intersection o f d o w n & across)
in reverse order.
0.32mm
No. 260
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