Wiseco 4966M10050 Piston Kit - 0.50mm Oversize to 100.92mm, 9.9:1 Compression body-ice-scratchers 1977-1991 Yamaha YZ250

1977-1991 Yamaha YZ250

Two 170mm clamps

Forget the outside noise with Senas Advanced Noise Control

2002 Polaris Magnum 325 4x4

2006-2010 KTM 85 SX (19/16)

Wiseco 4966M10050 Piston Kit - 0.50mm Oversize to 100.92mm, 9.9:1 Compression body-ice-scratchers 1977-1991 Yamaha YZ250Bore: 100. 92mm Compression: 9. 9: 1 Compression Sizing: 0. 50mm Oversize SPECIFICATIONS. Displacement: 666cc. Bore Standard: 100. 00mm. Bore Actual: 100. 50mm. Bore Oversize: . 50mm. Stroke: 84. 00mm. Compression Ratio Actual: 9. 9: 1. Skirt Coating: Moly. ITEM CONTENTS. 10050XS 100. 50 mm Ring Set. CW22 ROUND WIRE PIN LOCKS 22MM (PAIR). S655 PistonPin 22 x 57. 15mm NonChromed SW All Wiseco Pistons are forged from high silicon, low expansion aluminum