| Brand | Model | Year |
|---|---|---|
| Yamaha | RD 350 - 521 | 1975 |
| Yamaha | RD 400 - 1A3 | 1976-1979 |
Wössner forged piston kit complete with piston rings, piston pin and clip. Piston produced in 4032 T6 forged aluminum alloy with high quality coating to reduce friction and piston clearance: maximum performance, minimum friction and less noise. Computer simulation (FEA) is used in the production of Wössner pistons to precisely calibrate each design: T6 heat treatment ensures heat resistance and robustness when used with heavy loads. Wössner 2- and 4-stroke pistons and rings are designed for high performance and reliability, using premium materials and manufacturing methods: in some 4-stroke engine applications the piston is designed to use two piston rings, a compression ring and an oil control ring. Most pistons are offered in a graduated size.
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