Please contact us to arrange an appointment for viewings. 📞 01793 239039 | ✉️ Office@btpsouthwest.uk
1 4
Wossner  |  SKU: 56-W559+050.WO
New arrival

PISTON KIT 86-88 YZ125 56.50, WOSSNER 8118D050 YAMAHA MX

Available from Supplier — dispatched directly

This item is dispatched directly to you by our supplier. Supplier stock is separate from stock held at BTP.

Contact us about delivery

£119.47

Looking to purchase?

Call or WhatsApp us on 01793 239039

or email Office@btpsouthwest.uk

Our team is on hand to help with availability, advice and finance options.

Pickup currently unavailable at Braydon Trailers HQ

BTP – Your Trusted Trailer & ATV Specialists in the South West

Authorised dealer for top brands, including CFMOTO, Brian James, Debon, Cheval Liberté, Tiki, Woodford, Erde, and more.

Description

This Wossner 56.50mm (+0.50 oversize) forged piston kit is designed for Yamaha YZ125 models from 1986 to 1988. Featuring a forged construction and elliptical design, this piston is built to withstand thermal and mechanical stress while ensuring efficient combustion heat transfer and even thrust load distribution. Manufactured in Germany, it is suited for two-stroke engine performance and reliability.

Features

  • Forged piston for increased strength and durability

  • Elliptical design provides uniform bearing surface under heat expansion

  • Even thrust load distribution reduces localised pressure and risk of piston collapse

  • Optimised for efficient combustion heat transfer to cylinder walls

  • Manufactured in Germany

Specifications

  • Bore: 56.50mm

  • Actual diameter: 56.44mm

  • Displacement: 123 cm³

  • Stroke: 50.00mm

  • Clearance: 0.06mm

  • Compression height: 30.00mm

  • Compression ratio: 2-stroke

Cross-Reference OEM Part Numbers

  • Piston Kit Part No.: 56-W559+050.WO

  • Wossner Piston Kit No.: 8118D050

  • Lock: CW16

  • Pin: WP036

  • Ring Set: RSB5650

Vehicle Fitments

  • Yamaha YZ125 1986

  • Yamaha YZ125 1987

  • Yamaha YZ125 1988

Back to top