Allow me to clear the slate: how fast is you free spirit currently running? Have you done any performance mods to this point? Spend some time in the wiki, and on sites like treatland.tv and 1977mopeds.com, then get back to us. I jumped in headlong with a new kit on my first ped before I was ready. I fried the kit in the first week and killed my stock crank in process. the learning curve can be rather steep, do your homework and get all your ducks on a row before taking the big plunge. Or dive right in and watch your bank account, and your ride, suffer.