4764M08700 Wiseco Std Piston Kit for Yamaha TT500 XT500 1976-1981 87mm 9:1 CR

Wiseco Std Piston Kit for Yamaha TT500 & XT500

This standard bore piston kit for Yamaha TT500 and XT500 models restores top end compression with an 87mm forged piston rated at 9:1 compression, cross-referenced to Wiseco part 4764M08700.

Overview

This Wiseco Std Piston Kit for Yamaha TT500 & XT500 delivers a direct-fit top end rebuild solution for thumper singles from 1976 through 1981. The forged 87mm piston with 9:1 compression ratio restores factory power characteristics for riders servicing a worn or seized top end. It suits mechanics and vintage off-road enthusiasts keeping these classic Yamaha singles running strong.

Built For Performance

• Forged aluminum construction for strength under high cylinder pressures
• 87mm standard bore size matches factory cylinder dimensions
• 9:1 compression ratio consistent with original engine tuning
• Wiseco part number 4764M08700 for easy cross-reference
• Designed for Yamaha TT500 and XT500 four-stroke singles

Fits These Machines

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

On-The-Job Use

• Top end rebuilds on vintage Yamaha singles
• Restoring compression on high-mileage engines
• Dirt track and trail riding maintenance
• Vintage motorcycle restoration projects

Specs At A Glance

Good To Know

Q: Does this kit require cylinder boring? A: This is a standard bore piston, so it fits a cylinder already at factory 87mm spec without overboring. Measure your cylinder for wear before ordering.

Q: Are rings and pin included? A: Wiseco piston kits of this type typically include the piston, rings, wrist pin, and circlips. Confirm the contents with the listing details before purchase.

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