Piston Kit Yam 350 R5 65.50, Wossner 8221D150

Description

This piston kit is designed for Yamaha 350 R5 motorcycles manufactured between 1973 and 1975. It includes a single forged Wossner piston with a +1.50mm oversize (65.50mm bore), optimised for durability and performance in two-stroke engines. The elliptical design ensures uniform load distribution under heat expansion, reducing the likelihood of piston failure. Manufactured in Germany, this piston is engineered for reliability under demanding conditions.

Features

  • Single forged Wossner piston

  • +1.50mm oversized bore (65.50mm, actual piston diameter 65.43mm)

  • Elliptical shape for even thrust load distribution and thermal stability

  • Designed to optimise combustion heat transfer

  • Made in Germany

Specifications

  • Part Number: 8221D150

  • Bore Size: 65.50mm (actual piston size 65.43mm)

  • Oversize: +1.50mm

  • Displacement: 347cm³

  • Stroke: 54.00mm

  • Clearance: 0.07mm

  • Wossner Compression Ratio: 2-stroke

  • OEM Compression Ratio: 2-stroke

  • Compression Height: 36.00mm

Cross-Reference OEM Part Numbers

  • Clips: CW16

  • Piston Pin: WP027

  • Rings: RSB6550 x 2

Vehicle Fitments

  • Yamaha 350 R5 1973–1975

Piston Kit Yam 350 R5 65.50, Wossner 8221D150

Product form

This piston kit is designed for Yamaha 350 R5 motorcycles manufactured between 1973 and 1975. It includes a single forged... Read more

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    SKU: 56-W9898.150.WO

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    Description

    This piston kit is designed for Yamaha 350 R5 motorcycles manufactured between 1973 and 1975. It includes a single forged Wossner piston with a +1.50mm oversize (65.50mm bore), optimised for durability and performance in two-stroke engines. The elliptical design ensures uniform load distribution under heat expansion, reducing the likelihood of piston failure. Manufactured in Germany, this piston is engineered for reliability under demanding conditions.

    Features

    • Single forged Wossner piston

    • +1.50mm oversized bore (65.50mm, actual piston diameter 65.43mm)

    • Elliptical shape for even thrust load distribution and thermal stability

    • Designed to optimise combustion heat transfer

    • Made in Germany

    Specifications

    • Part Number: 8221D150

    • Bore Size: 65.50mm (actual piston size 65.43mm)

    • Oversize: +1.50mm

    • Displacement: 347cm³

    • Stroke: 54.00mm

    • Clearance: 0.07mm

    • Wossner Compression Ratio: 2-stroke

    • OEM Compression Ratio: 2-stroke

    • Compression Height: 36.00mm

    Cross-Reference OEM Part Numbers

    • Clips: CW16

    • Piston Pin: WP027

    • Rings: RSB6550 x 2

    Vehicle Fitments

    • Yamaha 350 R5 1973–1975

    Shipping & Delivery

    How long will my item take to arrive?

    Orders are typically dispatched within 1 working day and are shipped on a 24hour (non-guaranteed) service.

    Where do you ship to?

    We currently only ship orders within the UK.

    How can I track my order?

    Once your order has been dispatched, you will receive a tracking code. Tracking information is emailed to the email address that was provided when placing the order.

    Can I collect my order?

    Unfortunately we do not offer order collections from our fulfilment centre.

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