That's a very nice bicycle for motorizing. I would check close the 212 predator basic mount kit from Ghetto Bike. I think almost all of his motorized bicycle parts (hubs, jackshaft, mounts, suspension fork, steel rod for entire length of seat post and wide pedal crank, exhaust with muffler, etc) will fit the aluminum Felt cruisers. You won't regret the money and time you spend fitting that bicycle with a 212 predator with parts from Ghetto Bike because the finished build will be a lot of fun.