Wiseco 4767M08800 Forged Piston Kit 88mm 12:1 CR for Yamaha XT/TT/SR500

The Wiseco 4767M08800 is a high-performance forged piston kit designed for the Yamaha XT500, TT500, and SR500. This kit delivers a +1mm oversize 88mm bore with an aggressive 12:1 compression ratio, making it an ideal choice for performance rebuilds and engine restoration projects on these classic single-cylinder four-stroke engines.

Key Features:

• Forged high-silicon aluminum alloy construction for superior strength, impact resistance, and fatigue durability compared to cast alternatives
• 88mm bore diameter — +1mm oversize over the standard 87mm bore
• 12:1 compression ratio for increased power output and throttle response
• Piston ring part number 3465XC included in kit
• Wrist pin part number CW20 included in kit
• Innovative forging design and optimized piston skirt profile for maximum horsepower and torque
• Engineered to tight tolerances for each specific engine application

Kit Includes:

• 1x Wiseco forged piston
• 1x Piston ring set (3465XC)
• 1x Wrist pin (CW20)
• 2x Wrist pin circlips

Important Installation Notes:

• This is an oversize piston — cylinder boring or sleeving is required prior to installation
• Always verify piston-to-valve clearance when installing performance pistons
• Recommended piston-to-valve clearance: 0.080" intake / 0.100" exhaust

Wiseco is the only major aftermarket piston brand in the United States that manufactures exclusively using the forging process, resulting in superior grain structure, tensile strength, and durability for demanding powersports applications.