Installing Top-Side Components - Arctic Cat 2015 XR Service Manual

Inspecting Camshaft Bearing
Journal
1. Inspect the bearing journal for scoring, seizure
marks, or pitting.
2. If excessive scoring, seizure marks, or pitting is
found, the cylinder head assembly must be replaced.
 NOTE: If the journals are worn, replace the cam-
shaft.
Inspecting Camshaft Spring/Drive
Pin
1. Inspect the spring and drive pin for damage.
2. If damaged, the camshaft must be replaced.
Installing Top-Side
Components
A. Piston
B. Cylinder
1. Install the piston on the connecting rod making sure
the circlip on each side is fully seated in the piston.
 NOTE: The piston should be installed so the arrow
points toward the exhaust.
2. Place the two alignment pins into position. Place the
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
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.
The cylinder should slide on easily. Do not force the cyl-
inder or damage to the piston, rings, cylinder, or crank-
shaft assembly may occur.
CF060A
4. Loosely install the two nuts which secure the cylin-
der to the crankcase.
 NOTE: The two cylinder-to-crankcase nuts will be
tightened in step 11.
CAUTION
CC032D
CF083
CC024D
83