POSH Racing CDI. Wanna make your ruckus go faster?? Install one of these!!!  Has different ignition curves as well as a higher rev limiter. Also with the kit is a home made circuit protector. Circuit protector has its own fuse and relay to protect stock ECM from getting fried!! Bought this new without circuit protector for $500 and they are hard to get. Fairly easy to install, helps if you have knowledge of electrical circuitry, relays, and ignitions. Might work on other brand scooters??? 4 stroke motors only!!! Comes with instructions, unfortunately it is not very helpful unless you can read japanese. Has color pictures. Overall the ignition is pretty self explanatory on how to install. The circuit protector is a little more complicated!!!