This VintCo piston kit is a 56.0 mm standard-bore replacement for 1976-1981 Yamaha MX125 and YZ125 models. Intended for vintage 2-stroke engine rebuilds, it includes the piston, rings, pin and clips, and is produced with modern materials and manufacturing techniques to meet or exceed OEM fit and performance. The piston is forged, made in Germany, and MoS2 coated to support running-in; a wrist pin bearing is available separately, and additional size options are also available.

Features

• Complete piston kit with piston, rings, pin and clips
• Suitable for vintage 2-stroke engine rebuilds
• Standard-bore replacement
• MoS2 coating supports running-in
• Wrist pin bearing sold separately
• Additional size options available

Specifications

• VintCo Part Number: PSY01-00
• Item Category: Piston Kits
• Bore Size: 56.0 mm
• Size: Standard
• Piston Size: 55.94 mm
• Clearance: 0.06 mm
• Construction: Forged piston
• Country of Manufacture: Germany

Cross-Reference OEM Part Numbers

• 537-11631-02-96
• 2K6-11631-00-97
• 3R3-11631-00-97
• 3N8-11631-10-93

Vehicle Fitments

• 1976 Yamaha YZ125
• 1976 Yamaha MX125
• 1977 Yamaha YZ125
• 1978 Yamaha YZ125
• 1979 Yamaha YZ125
• 1980 Yamaha YZ125
• 1981 Yamaha YZ125