If you've opened this link, and your afraid of power, then I suggest you close this window. This isn't your ebay special, or home brew setup. This is a 100% italian crafted 100cc kit for your jog, minarelli horizontal, aprilia sr50, or yamaha zuma. This will require machine work. This is a no joke no bullshit kit, that will put you on your ass if your not paying attention.The typical 70cc zuma kit makes in the range of 7-12hp.  Malossi 94cc kit is in the range of 27-29 Polini big evo 28-32 2fast 100 34-38 There is a 2-3 week turnaround for this item. This is for the yamaha minarelli engine, horizontal. Please let us know if you need it for the piaggio, or rc one.