Arctic Cat 120 Sno Pro 2010 Service Manual page 146

CAUTION
Make sure the circlips are firmly seated and the open
end is directed either up or down before continuing
with assembly.
33. Rotate each piston ring until the ring ends are
properly positioned on either side of the ring
keeper; then apply oil to the piston assemblies and
cylinder bores. Remove the rubber hoses from the
connecting rods.
34. In turn on each cylinder, place a piston holder (or
suitable substitute) beneath the piston skirt and
square the piston in respect to the crankcase; then
using a ring compressor or the fingers, compress
the rings and slide the cylinder over the piston.
Remove the piston holder and seat the cylinder
firmly onto the crankcase.
NOTE: The cylinders should slide on easily. DO
NOT force the pistons into the cylinders.
35. Install each cylinder with the four nuts and four
new cap screws; then secure the cylinders by tight-
ening the cylinder base nuts and cap screws to 44
ft-lb in three steps using the appropriate pattern
shown.
2-102
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800 cc
1000 cc
NOTE: Always use new cap screws when install-
ing the cylinders.
36. Install the two cylinder O-rings on the top of each
cylinder making sure they are correctly positioned
in the grooves.
NOTE: Lubricating the cylinder O-rings with a
light coat of grease will help keep them seated in
the grooves of the cylinder.
37. Place new O-rings onto each of the head cap
screws. Place four of these cap screws (from oppo-
site end of each other) into the cylinder head.
Thread the spark plugs in part way; then while
holding the head above the cylinder, carefully start
and finger-tighten all four cap screws while
observing the cylinder O-rings to make sure they
remain in position. Slowly place the head into
position on top of the O-rings.
Section
Table of Contents
0738-206
0738-220
FC077
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