Hi guys. First off thanks in advance for any input. I an planning in using a worksman mens frame almost similar to the one pirate cycles has costumed out just using different bars, setup, etc. It is a single great coaster brake rear hub which makes my first question how rewritable are just coasters with these engines. Second is I've been reading on differences between types of motors. Ultimately id like to run a 4 stroke but I'm thinking more shot the 66cc grubee skyhawk gt5. Only reason I'm not considering the 49cc version is the heaviness of the bike (all steel frame, steel wheels) plus the engine would strain that motor. looking for opinions on this setup and what the more experienced members would recommend in helping me move forward. Would like to order an engine in thee morning