I've had this bike for many years up in the loft. I got it from my good friend, Warren Naufzinger. It had a briggs engine on it. I eventually got the drive train components to put it back like it should be. It is believed that only 1000 were built, but I have seen a lot of them myself. They do ride nice and they seem to accelerate quicker. The clutch has 1" rollers instead of 7/8" and the Idler pulley has a different location for the tension spring. other than that, it's the same as the cycle. I suppose the larger rollers are to move the gear ratio up a little quicker.