Oh, and one more thing, I forgot to say you can get new worksman wheels from Pat at sportsmanflyer.com. I might even have the components to build you a set. I build the majority of the wheels for Pat and his customers. If you run the predator motor, using a centrifugal clutch and a moped rear hub, or lightweight motorcycle hub is your best bet. The moped hubs are pretty good, have bolt on sprockets and if you run the Puch, or Lelue, you'll find they're near perfect match to the front worksman hubs, they even run the same brake shoes! The hardest part is getting the offset correct....