72mm standard-bore dual-ring piston and gasket kit for Polaris Indy Trail 488, 1986-1999

Two-piston top-end kit for the Indy Trail 488

This kit is listed for the 1986-1999 Polaris Indy Trail 488 with a standard 72mm cylinder bore. It combines two pistons with two ring grooves each, their pins and retaining clips, plus a selection of flat gaskets and O-rings for top-end service.

Kit contents and bore size

Listed application

Polaris Indy Trail 488, 1986-1999; confirm the engine version

Bore version

72mm standard bore

Pistons and rings

2 pistons and 4 piston rings, two rings per piston

Pin hardware

2 piston pins and 4 retaining clips

Gasket selection shown

14 flat gaskets in several profiles and 3 O-rings

Check the cylinders before ordering

The 72mm figure identifies the standard cylinder-bore version; it is not a measured piston diameter or a piston-to-cylinder clearance. Measure both cylinders and check whether they have already been bored oversize. Worn, tapered or scored bores need inspection before choosing replacement pistons.

Match the engine identification and gasket openings to the parts removed. The gasket selection has several shapes, so use only those that match the engine and its service procedure. Piston alloy, gasket thickness and ring-gap specifications are not specified for this kit. Cylinders, heads and small-end bearings are not included in the pictured supply.