| Forged from high-silicon aluminum alloy for maximum strength and dependability.. Innovative forging design and piston skirt provide maximum horsepower and torque.. Wiseco High-Performance piston kits are priced with piston, rings, pins and circlips (unless noted otherwise).. Oversize pistons require cylinder sleeving.. SPECIFICATIONS. Displacement: 808cc. Bore - Standard: 80.00mm. Bore - Actual: 82.00mm. Bore - Oversize: 2.00. Stroke: 76.50mm. Cylinders: 2. Compression Ratio - Actual: 11:1. Skirt Coating | ArmorGlide. ITEM CONTENTS. 8200XX - 82.00MM RING SET. CW18 - ROUND WIRE PIN LOCKS 18MM (PAIR). S524 - PistonPin 18mm x 2.244in. NonChromed TW |