Arctic Cat 2014 SNO PRO 500 Operator's Manual page 46

2. The trueness (out-of-roundness) is the difference
between the highest and lowest reading. Maxi-
mum trueness (out-of-roundness) must not exceed
0.004 in.
Piston Skirt/Cylinder Clearance
1. Measure each cylinder front to back about 1 in.
from the bottom of each cylinder.
2. Measure the corresponding piston skirt diameter at
a point 1 cm above the piston skirt at a right angle
to the piston-pin bore. Subtract this measurement
from the measurement in step 1. The difference
(clearance) must be within 0.0030-0.0041 in.
42
Piston-Ring End Gap
1. Place each piston ring in the wear portion above the
exhaust port of its respective cylinder. Use the pis-
ton to position each ring squarely in each cylinder.
2. Using a feeler gauge, measure each piston-ring
end gap. Acceptable ring end gap must be within
0.008-0.016 in.
FC044
Piston Pin And Piston-pin Bore
1. Measure the piston pin diameter at each end and in
the center. Acceptable piston pin measurement
must be within 0.8659-0.8661 in. If any measure-
ment varies by more than 0.001 in., the piston pin
and bearing must be replaced as a set.
0725-586
2. Insert a snap gauge into each piston-pin bore; then
remove the gauge and measure it with a microme-
ter. The diameter measurement must be within
0.8661-0.8665 in. Take two measurements to
ensure accuracy.
AC091
FC045
IO012