47
CC287D
NOTE: If the journals are worn, replace the cam-
shaft; then measure the clearance again. If it is still
out of tolerance, replace the cylinder head.
Inspecting Camshaft Spring/Drive
Pin
1. Inspect the spring and unloader pin for damage.
CF061A
NOTE: With the weight extended, the unloader
pin should be flat-side out; with the weight
retracted, the unloader pin should be round-side
out.
CF060A
2. If damaged, the camshaft must be replaced.
Installing Top-Side
Components
A. Piston
B. Cylinder
1. Lubricate the piston pin, connecting rod, and pis-
ton pin bore with motor oil; then install the piston
on the connecting rod making sure there is a cir-
clip on each side and the open end of the circlip is
directed upwards or downwards.
NOTE: The piston should be installed so the
arrow points towards the exhaust.
MD1213
2. Place the two alignment pins into position. Place a
new cylinder gasket into position; then place a pis-
ton holder (or suitable substitute) beneath the pis-
ton skirt and square the piston in respect to the
crankcase.
MD1344
3. Lubricate the inside wall of the cylinder; then
using a ring compressor or the fingers, compress
the rings and slide the cylinder over the piston.
Route the cam chain up through the cylinder cam
chain housing; then remove the piston holder and
seat the cylinder firmly on the crankcase.