Everyone knows the variator for a scoot is the go to, best gain for your buck. Malossi has a sweet kit, complete with everything you need to boost your top speed, and acceleration. Its not uncommon to see 5-9mph with just a variator kit install. Add a pipe, with a jet kit and your likely to see 50+ on a stock bore zuma or jog. Works on ALL Zuma 2 stroke models, and horizontal Yamaha jog. Will work on all Minarelli engines.