Installing Top-Side Components; Inspecting Camshaft Spring/Drive Pin - Arctic Cat 450 XC 2011 Service Manual

6. If clearance is excessive, measure the journals of the
camshaft.
 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.
 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.
CC145D
2. If damaged, the camshaft must be replaced.
Installing Top-Side
A. Piston
B. Cylinder
1. Lubricate the piston pin, connecting rod, and piston pin
bore with motor oil; then install the piston on the con-
necting rod making sure there is a circlip on each side.
CC287D
 NOTE: The piston should be installed so the IN
points towards the intake side.
2. Place the two alignment pins into position. Place a
new cylinder gasket into position; then place a piston
holder (or suitable substitute) beneath the piston skirt
and square the piston in respect to the crankcase.
CF061A
Manual
Table of Contents
Components
CF060A
FI626
MD1344
37