i recently put a 700cc kit on my tomos. i absolutely LOVE the new speed and acceleration that i now have. it accelerates twice as fast, and tops out around 60 mph. However, the brakes do kinda suck and i have to really squeeze the handles to stop from 60. also, i recently had to lay down $260 for new lock ring, a seal, a spring, a gasket, and all the labor. Not to mention i needed 6 new clutch shoes, since the were worn down to bare metal, and the odometer reads on 3548! In spite of this, the incredable performance that i get is much worth the maintainance, and money