For sale for $225 shipped is a Top End Piston Rebuild kit, Brand new in boxes [you will get two kits with SPI Brand single ring pistons, Ring sets, Circlips, wrist pins, Wrist pin bearings and a Top End Gasket set as shown ----for complete two cylinder rebuild]. These are OEM Style Piston kits, Size: 67.5mm bore ---Standard Bore FITS: 1973 1974 1975 1977 Ski-Doo TNT 440 F/A 1972 Ski-Doo Blizzar...