Wiseco 4689M07300 73.00mm 10.5:1 Compression Motorcycle Piston Kit

Bore: 72.95mm Compression: 10.5:1 Compression Sizing: Standard BoreSPECIFICATIONS. Displacement: 249cc. Bore - Standard: 73.00mm. Bore - Actual: 73.00mm. Bore - Oversize: STD. Stroke: 59.6mm. Compression Ratio - Actual: 10.5:1. Note: Cylinder boring required. ITEM CONTENTS. 2874XC - 73.00 mm Ring Set. CW18 - ROUND WIRE PIN LOCKS 18MM (PAIR). S524 - PistonPin 18mm x 2.244in. NonChromed TW 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.1999-2006 fits YAM TTR250

• Wiseco's forged pistons are tougher and more durable than cast pistons, and will stand up to the abuse that high performance motorsport applications require
• Piston kits contain one piston, rings, piston pin and piston pin circlips
• 2874XC ring set
• 249cc