For 50cc cylinders in offroad sport design based on the Simson GS-50 offroad sport classic from the 1970s, fits Simson S51, S53, SR50, KR51/2.
- **Please note:** untreated cylinder head, must be machined to desired dimensions.
- Perfectly adapted to the external dimensions of the Simson cylinder.
- The head is flush with the original cylinder at all ends.
- Perfect cooling performance and casting.
- Long spark plug thread.
- Suitable models: S51, S53, SR50, KR51/2
- Original Simson* number: 222992