Shaft of shift, 3. a 4.-speed (MZA) - Simson S51, S53, S70, S83, SR50, SR80, KR51/2 Note .: Designed for 3. and 4.-speed gearbox. It is original spare part. Can be used for: Simson S51, S53, S70, S83, SC-050, SD 50, SR50, SR80, TS050, KR51/2 The product of the MZA, which is the exclusive holder of the SIMSON brand. GPSR Contact: MZA Meyer–Zweiradtechnik GmbH, Baunsbergstr. 60-62, 34131, Kassel,