2000 Polaris Indy 500 / 600 snowmobile service manual, Page 65Get this manual
ENGINES PistonCylinder Clearance Specifications 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