Wiseco 85mm 10:1 Compression Piston Kit for Motorcycles - High Performance Engine Upgrade for Harley, Honda, Yamaha & More - Perfect for Racing, Street Bikes & Custom Builds

Bore: 85.95mm Compression: 10:1 Compression Sizing: 1.00mm OversizeSPECIFICATIONS. Displacement: 344cc. Bore - Standard: 84.00mm. Bore - Actual: 85.00mm. Bore - Oversize: 1.00. Stroke: 61.3mm. Compression Ratio - Actual: 10:1. Note: Cylinder boring required. Note: Radial Head. ITEM CONTENTS. 3347XC - 85.00 mm Ring Set. CW21 - ROUND WIRE PIN LOCKS 21MM (PAIR). S529 - PistonPin 21mm x 2.756in. NonChromed SW All Wiseco Pistons are forged from high silicon, low expansion aluminum which offers superior strength, reduced weight, improved heat transfer, and longer life. Diamond turned finish from one of the many CNC computer controlled turning centers guarantees you a perfect finish with no size variation. Wiseco pistons can be installed in any of todays cylinder bore compositions. Wisecos state-of-the-art computerized manufacturing facility is dedicated to supplying both the high-perfomance racer and recreational enthusiast with the finest forged piston available in todays market place.1983-1984 fits HON XR350R