2003 Polaris Deep Snow Snowmobiles Service Manual, Page 108Get this manual
ENGINES Piston Measurement
Whenever cylinders are honed or bore clearance is checked, it is important to measure piston diameter properly to arrive at its major dimensionMeasurements should be taken with piston at room temperature, and at right angles to the pin as shownDetermine the largest diameter within this area and refer to the chart below for clearance specificationsCylinder bore must be straight and concentricRefer to honing information outlined in this chapter for specific proceduresRefer to the specifications section in chapter for Target Clearance when re-boring cylinder, or Service Limit specifications (to determine if piston requires replacement)