S-Drive variator kit for Yamaha, clones 16mm

OK for racing! High speed pulley / variator kit to increase performance of your Yamaha or clone, plus Minarelli engines. Good take-off with consistent acceleration in the mid range. Higher top speed. Full variator kit for Yamaha engines including: Jog 90, Axis 90 and variants Jog 80, Champ 80 Excel, Active, Box'n Jogs with the model codes: 27V, 48F, 1HH, 1KH, 1RN, 2EX, 2JA, 2TA, 3CP "Sports" Champ / RS (50cc) BW'S 3AA TNT Roma Plus: FYM Urban (newer models with 16mm crank , including R4) CPI Hussar (with 16mm crank) Keeway Matrix 50 Vmoto Monza For other Minarelli engines with 13mm crank search product CT-P07C-3 (this category) This kit includes: new variator pulley (the "sheave") hardened ramp plate and nylon sliders new pulley collar uprated clutch springs set of 5.5g weight rollers As well as increasing top speed, this kit can also decrease load on your engine because it extends the gearing at the top end, reducing the RPM. Testimonial: "It goes like a rocket" R.S, Auckland (fitted to Urban R4)