Arctic Cat 660 cc, Service Manual

Page: 96 / 396

3-14
AO231
AO232A
10. To obtain the proper valve clearance, an 0.17 mm
(0.007 in.) feeler gauge will go between the
camshaft and shim and an 0.22 mm (0.009 in.)
feeler gauge will not go between the camshaft and
shim. This will indicate a properly adjusted valve.
„
NOTE: This procedure must be done without
applying any force to the feeler gauge.
„
NOTE: To determine the valve clearance, use a
feeler gauge in the following manner. Using the
illustration below to note that one intake valve set
and one exhaust valve set at a time will be checked
before rotating the crankshaft to the next set of
valves.
„
NOTE: All valve clearance checks should be
done prior to any adjusting or shimming; there-
fore, record each valve clearance value in the
sequence for reference.
11. Check clearance for #1 and #6 (record the
clearances).
12. Check clearance for #3 and #5 (record the
clearances).
13. Check clearance for #2 and #4 (record the
clearances).
0738-495
AO233
REPLACING VALVE SHIM
1. With the valve closed, turn the shim bucket so the
notched section faces toward the center of the
engine.
AO234A
2. Rotate the crankshaft clockwise until the two sets
of valves are fully open; then remove the camshaft
bearing cap and cap screws and install Valve
Shimming Tool (p/n 0644-411) as shown and
tighten the cap screws to 1.1 kg-m (8 ft-lb). Rotate
the crankshaft 90° clockwise and remove the shim.
Valve Clearance (Cold)
15° - 25° C
(59° - 77° F)
0.18 - 0.23 mm
(0.008 - 0.009 in.)