[kz1000st]

Owner Problems are very simple to explain. I bought my scooter from a man who is 6' 8" tall and weighs 285 pounds. I found two helmets in the scooter when I got it home telling me that he rode two up with his wife. I would imagine he exceeded the Gross Weight Rating by a considerable amount and it caused a stress in the shaft.

As I patiently tried to explain to the Admin over there Chinese scooters have much lower limits than a Japanese scooter. If you stay within those limits a Chinese scooter will do fine. Exceed those limits they're toast. A former member here, Jim63, tried to use a Roketa MC54-250B as a commuter. His ride was close to 90 miles a day including many miles on the interstate. Ultimately the engine failed on his Linhai Yamaha clone quite spectacularly. The cylinder head literally broke pouring coolant into the engine trashing the entire top end. He dumped it and bought an SYM which was more suitable for the job.

In contrast the Admin over there used his Roketa on 800 mile trips successfully. He stayed on State Highways instead of Interstates to keep from flogging it. Still, in the time he's owned it, that Admin has done 5 PDIs in his words. A PDI is what you do when you first get something, after that it's called an "Overhaul". He's very conscientious about maintenance and uses it sensibly. Used insensibly it would probably suffer the same fate as Jim63's.

I don't know what's up with your friend's CF. It seems to me that he didn't lube the rollers and they're sticking which might account for the noise. Have him register here and we might be able to get it straightened out.