4619M09500 Wiseco Std Piston Kit for Yamaha XT600 TT600 1984-2004 95mm 11.5:1

Wiseco Std Piston Kit for Yamaha XT600 & TT600

This Wiseco standard piston kit (OEM cross-reference 4619M09500) is a 95 mm, 11.5:1 compression piston assembly for Yamaha XT600 and TT600 engines, built to restore compression and reliability during a top-end rebuild.

Overview

This Wiseco standard piston kit is a forged piston assembly made for Yamaha XT600 and TT600 single-cylinder engines. With a 95 mm standard bore and 11.5:1 compression ratio, this piston kit brings compression and durability back to a worn top end. It suits riders and mechanics servicing these classic Yamaha thumpers for trail or street use.

Built For Performance

• Forged piston construction for strength and heat resistance
• Standard 95 mm bore for direct-fit rebuilds without overboring
• 11.5:1 compression ratio for reliable combustion and torque
• OEM cross-reference 4619M09500 for easy parts matching
• Designed for Yamaha XT600 and TT600 single-cylinder engines
• Suitable for routine top-end service and engine refreshes

Fits These Machines

• for Yamaha XT600, 1984-2004
• for Yamaha TT600, 1984-2004

On-The-Job Use

• Top-end rebuilds after compression loss or piston wear
• Standard-bore rebuilds that do not require cylinder overboring
• Dual-sport and trail engine refreshes
• Shop work where OEM cross-reference 4619M09500 is specified

Specs At A Glance

Good To Know

Q: Is this piston kit a direct replacement? A: It is a standard bore kit at 95 mm, so it fits cylinders that remain within factory bore specifications. Measure your cylinder before ordering to confirm it has not been overbored.

Q: Does the kit include rings and pin? A: Wiseco piston kits of this type typically ship as a complete assembly. Confirm the exact contents with the listing 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.