I picked this up yesterday. When I got it it had a shimano "333" 3 speed rear hub. But it had been messed with and parts were missing and it didn't work so I removed it and installed some heavy duty coaster brake wheels I had laying around. I'm gonna leave them on until I can figure out the rear hub. I removed all the 3 speed stuff except for the grip shift. Then lubed and cleaned everything. Seats messed up in the front but for now I'm just gonna tape it up. It's a smooth riding lil bike!