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PISTON KIT 74-75 YAMAHA YZ 250 71.0mm +1.0mm OVER VINTCO PSY34-1.0
  • PISTON KIT 74-75 YAMAHA YZ 250 71.0mm +1.0mm OVER VINTCO PSY34-1.0
  • PISTON KIT 74-75 YAMAHA YZ 250 71.0mm +1.0mm OVER VINTCO PSY34-1.0
  • PISTON KIT 74-75 YAMAHA YZ 250 71.0mm +1.0mm OVER VINTCO PSY34-1.0
  • PISTON KIT 74-75 YAMAHA YZ 250 71.0mm +1.0mm OVER VINTCO PSY34-1.0
  • PISTON KIT 74-75 YAMAHA YZ 250 71.0mm +1.0mm OVER VINTCO PSY34-1.0
  • PISTON KIT 74-75 YAMAHA YZ 250 71.0mm +1.0mm OVER VINTCO PSY34-1.0
  • PISTON KIT 74-75 YAMAHA YZ 250 71.0mm +1.0mm OVER VINTCO PSY34-1.0
  • PISTON KIT 74-75 YAMAHA YZ 250 71.0mm +1.0mm OVER VINTCO PSY34-1.0
  • PISTON KIT 74-75 YAMAHA YZ 250 71.0mm +1.0mm OVER VINTCO PSY34-1.0
  • PISTON KIT 74-75 YAMAHA YZ 250 71.0mm +1.0mm OVER VINTCO PSY34-1.0
PISTON KIT 74-75 YAMAHA YZ 250 71.0mm +1.0mm OVER VINTCO PSY34-1.0

PISTON KIT 74-75 YAMAHA YZ 250 71.0mm +1.0mm OVER VINTCO PSY34-1.0

£161.57 GBP
Taxes included. Shipping calculated at checkout.

This VintCo piston kit is for 1974-1975 Yamaha YZ250 models and provides a forged replacement piston assembly for vintage 2-stroke engines in 71.0 mm, +1.0 mm oversize. It includes the piston, rings, pin and clips, while the wrist pin bearing is available separately. The kit is made in Germany using modern materials and manufacturing techniques for OEM-style fitment and performance, and the supplied rings are intended for Nikasil-plated or iron-lined cylinders rather than the original chrome-plated Yamaha cylinder.

Features

  • Complete piston kit with piston, rings, pin and clips
  • Wrist pin bearing sold separately
  • Suitable for vintage 2-stroke Yamaha YZ250 applications
  • Compatible with Nikasil-plated or iron-lined cylinders
  • Rings are not compatible with the original chrome-plated Yamaha cylinder on 1974-1975 YZ250 models
  • Additional size options are available

Specifications

  • VintCo Part Number: PSY34-1.0
  • Piston size: 71.0 mm
  • Oversize: +1.0 mm
  • Piston measurement: 70.94 mm
  • Clearance: 0.06 mm
  • Construction: Forged piston
  • Coating: MoS2 coated for break-in
  • Country of manufacture: Germany

Vehicle Fitments

  • 1974 Yamaha YZ250
  • 1975 Yamaha YZ250