4767M08700 Wiseco Std Piston Kit for Yamaha TT500 XT500 1976-1981 87 mm 12:1

Wiseco Standard Piston Kit for Yamaha TT500 & XT500

This Wiseco standard piston kit is a complete replacement piston assembly for Yamaha TT500 and XT500 engines, restoring compression and cylinder sealing with an 87 mm bore and 12:1 compression ratio. Cross-references Wiseco 4767M08700.

Overview

This Wiseco std piston kit for Yamaha TT500 and XT500 models provides a fresh piston, rings, wrist pin, and clips for a top-end rebuild at the original 87 mm bore size. The 12:1 compression ratio suits riders who want strong throttle response from their 1976-1981 thumper. It is built for home mechanics and shops doing a straightforward piston replacement.

Built For Performance

• Forged construction for strength under high-compression loads
• 12:1 compression ratio for strong low-end and mid-range response
• 87 mm standard bore diameter for stock cylinder fitment
• Complete kit including piston, rings, wrist pin, and circlips
• Wiseco 4767M08700 part number for easy cross-referencing
• Designed for the Yamaha TT500 and XT500 1976-1981 engine family

Fits These Machines

• for Yamaha TT500 1976-1981
• for Yamaha XT500 1976-1981

On-The-Job Use

• Top-end rebuilds after worn rings or piston damage
• Restoring stock compression on a tired engine
• Dirt track and trail riding on TT500 and XT500 models
• Seasonal refresh during cylinder service or honing
• Shop builds needing a dependable high-compression piston

Specs At A Glance

Good To Know

Q: Will this piston fit a bored-over cylinder? A: This is a standard 87 mm piston kit, so it suits a stock bore cylinder rather than an oversize application. Measure the cylinder before ordering to confirm.

Q: Does the kit include everything for the top end? A: It includes the piston, rings, wrist pin, and circlips in the listed size. Gaskets and bearings are separate, so plan those parts into the build.

Slight variation in finish or dimensions may occur between production runs, and fit can depend on serial number, so confirm compatibility before ordering.