Camshaft
and
Tappets
Figure
8-1
3
1.
Place crankcase on its side to prevent tappets
from falling or being damaged. Push tappets in to
clear cam
lobes.
Remove camshaft.
CAUTION: Tappets must be installed in their
A
original positions. This eliminates unnecessary
valve stem grinding for obtaining correct tappet
clearance. Mark tappets and crankcase prior to
removal to prevent error.
2.
Remove tappets.
3.
In reassembly, install tappets in their original
positions. Push in fully to avoid damage during
camshaft installation.
4.
Respect camshaft bearing surface for wear or
damage. Lubricate bearing surface before
reassembly.
5.
Refer to Figure
8-13.
Align timing marks on
camshaft and crankshaft when installing.
TIMING MARK
(CAM GEAR)
~IMING
MARK
(CRANK GEAR)
Figure
8-1
3.
Connecting
Rod
and Piston
Figures
8-14
and
8-1
5
1.
Scrape
off
all carbon deposits that might inter-
/"-
fere with removal of piston from upper end of
cylinder.
2.
Straighten bent tabs of
lock
plate to remove
bolts from connecting rod cap. Remove plate
and cap.
3.
Turn crankshaft until piston is at top dead center.
Push
connecting rod and piston assembly out
through top of cylinder.
4.
Remove snap rings and piston
pin
to remove
5.
Refer
to
Figure
8-14.
Measure the diameter
of
the piston at center of piston skirt thrust faces.
Replace piston if measurement is not within
specifications (see 'SPECIFICATIONS').
connecting rod from piston.
Figure
8-1
4.
6.
Measure
the
cylinder bore and inspect for
out-of-
round and taper.
If
cylinder is scored or worn
more than specification (see 'SPECIFICA-
TIONS'), it should be rebored and fitted with an
oversize piston and rings.
specifications and clearances. (See 'SPECI-
.
FICATIONS').
7.
Measure connecting rod and piston for
8-6
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