Drive face boss NARAKU Speed-up kit 20x36mm for Kymco, SYM vertical

Variable tuning set for original variators and almost all tuning variators. The speed-up shims can influence the length of the sleeve: extending it usually improves acceleration, while shortening it increases top speed. Before installation, be sure to measure the length of the original sleeve and then adjust the size of the speed-up sleeve with the washers accordingly! The kit contains an open racing variator sleeve and 30 spacers, each with 10 discs in 0.1, 0.2 and 0.5mm thicknesses. Sleeve size: 20x36. When using it on tuned variators, please measure the sleeve diameter, which should be 20mm.