Gearbox (gear Cogs Only) -BGM PRO- Vespa P-range (-1984) - PX125 (VNX1T, 146314-VNX2T, 232052), PX150 (VLX1T 264565-624601), PX200 (VSX1T, -315266), Rally180 (VSD1T), Rally200 (VSE1T) - 12/57, 13/42, 17/38, 21/35 Teeth - Original Ratio