55
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 camshaft.
Installing Top-Side
Components
NOTE: Arctic Cat recommends new gaskets be
used when assembling the engine.
1. Before installing on the connecting rod, install the
inside piston circlip into the piston making sure the
open end curve is in the piston opening.
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2. Install the piston on the connecting rod making sure
the “IN” is facing the intake side of the engine and
slide the piston pin through the piston; then install
the other piston circlip.
3. Repeat steps 1 and 2 for the other piston.
4. Install a new base gasket and the two dowel pins.
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5. Apply a generous amount of lubricant to both of the pis-
tons and the inside of the cylinders.
6. Using an appropriate ring compressor, compress the
rings and slide the cylinder over the pistons.
7. Pull the chain up through the cylinder and slide the cylin-
der down onto the dowel pins.
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8. Install the chain guide so it is seated at the top and
bottom.
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9. Install the two dowel pins and a new head gasket.
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10. While pulling the chain up through the head, install the
head onto the cylinder accounting for the chain guide,
chain tensioner guide, and two dowel pins.
