Polaris TRAIL BOSS 325 2001 Manual page 90

ENGINE
CYLINDER INSPECTION, CONT.
5. Record measurements. If cylinder is tapered or out of
round beyond .002, the cylinder must be re-bored
oversize, or replaced.
Cylinder Taper
Limit: .002 Max.
Cylinder Out of Round
Limit: .002 Max.
Standard Bore Size:
3.0732-3.0740I (78.000-78.020 mm)
PISTON INSPECTION
1. Measure piston outside diameter at a point 5 mm up
from the bottom of the piston at a right angle to the
direction of the piston pin.
2. Subtract this measurement from the maximum
cylinder measurement obtained in step 5 above.
Piston to Cylinder Clearance
Std: .0015-.0032I (.038-.082 mm)
Limit: .004I (.11 mm)
Piston O.D.:
Std: 3.0707-3.0717I (77.938-77.962 mm)
3.34
5 mm
Piston
Piston Pin