ProX / Vertex Engine Rebuild Kit. Stock / Standard 76.00mm Piston Kits and Complete Engine Gasket Set With Crankshaft Oil Seals. Includes (2) Pistons, (2) Sets of Rings, (2) Pins, (2) Pairs of Clips, (2) Top End Bearings, (1) Complete Gasket Set With Seals.
Will Fit:
1991 Ski-Doo Formula Mach 1 617
1991 Ski-Doo Formula Mach XTC
(2) 01.5591.000
(1) 711178A