PISTON KIT 98-01 YZ125 54.00 C, WOSSNER 8091DC YAMAHA MX

This Wossner piston kit with a 54.02mm bore (+0.02mm oversize) is tailored for Yamaha YZ125 and WR125 models from 1998 to 2001. Featuring a forged construction and precision engineering, it delivers exceptional strength, thermal efficiency, and reliability for high-performance two-stroke engines.

Features

• Forged piston ensures durability and high mechanical strength

• Optimised design for efficient heat dissipation from combustion to cylinder wall

• Elliptical profile promotes even load distribution and prevents piston collapse during thermal expansion

• Manufactured in Germany for consistent performance and quality

Specifications

• Bore size: 54.02 mm

• Actual piston size: 53.97 mm

• Display (cm³): 125

• Stroke (mm): 54.50

• Clearance (mm): 0.05

• Compression ratio: 2-stroke (Wossner and OEM)

• Compression height (mm): 28.00

Vehicle Fitments

• 1998 Yamaha WR125

• 1998 Yamaha YZ125 Base

• 1999 Yamaha WR125

• 1999 Yamaha YZ125 Base

• 2000 Yamaha WR125

• 2000 Yamaha YZ125 Base

• 2001 Yamaha WR125

• 2001 Yamaha YZ125 Base

Included Components

• Piston: Wossner PN# 8091DC

• Lock: PN# CW15

• Pin: PN# WP032

• Ring Set: PN# RSB5400

• Rod: PN# P2019