Gearbox (5 speeds), SHORT TRANSFER (MZA) - Simson S51, S53, S70, SR50, SR80, KR51/2 Note.: It's a five-speed sports gearbox. The gearbox is complete with gear drum and is ready for installation. Gears 1-4 originating transfer, 5. gear has a short transfer (32:23). So it's even faster! Can be used: Simson S51, S53, S70, SR50, SR80, KR51/2 The product of the MZA, which is the exclusive holder of