I bought the Diamo back in 2004 and it was built by Zongshen much as I could figure from the research I did on it. The engine has been great, still running like a top, but the chassis is less than wonderful. Vibration is a problem at high (60mph) speeds, vibrated the exhaust off, eventually, so it runs a straight pipe, now. LOL I could buy a pipe for it aftermarket, just hate to spend money on something I'm not sure I can keep running what with the lack of parts now. I quit putting batteries in it, kick start works fine as do the lights, run off the stator. I use it when it's muddy out back and I used it a lot duck hunting this season. My buddy broke the rear fender off it, no license plate bracket, now. Can't find a fender, but I'm not that worried about it as it's not used on the street now days. I can drain the carb with a drain plug on the float bowl, dump all the gas for storage. The only thing long term storage seems to do to it is make the clutch glue itself together. If it's spent a long time in storage without use, I'll have to take the oil fill off, bungee the clutch down to disengage, and break the plates apart through the oil fill hole with a long screw driver and a mallet. Oh, the rear sprocket bolts sheered off early on while street riding, just sheered off. Soft bolt material was the problem. I re-engineered the rear hub cush system with stronger stainless bolts and haven't had a problem many miles later.
Parts for all these China bikes are cheap. I bought a whole clutch basket for a guy that had a Zongshen based 150cc TTR125 clone. The clutch basket was 20 bucks, drive gear, all plates, pressure plate, and springs in a unit.
That was a tough little bike, too, BTW. But, the kid I sold it to trashed it a lot. He was a little moron.
I think the RX3 might be pretty road worthy, but I have my doubts about the air cooled TT they sell for 1900 or some such price. If it's as buzzy as that Diamo, stuff is gonna happen. LOL The vibs on that Diamo are enough to make my boys itch and go numb at 60 mph.
Might be nice if you're female......just sayin'.
I'll watch these little bikes, see how they go. MIGHT, I say MIGHT be an option in the future. But, the Honda CRF250L has been interesting me since it came out. The Honda is a tall guy, but I'm not that small and can actually flat foot my KLR. I don't think I need the KLR's weight and power, but I handle it in the woods here. If it gets really wet, though, I'll break out the Diamo. Meanwhile, the KLR is nice on the highway vs anything 250cc, Japanese or Chinese. I spent 1700 bucks on the KLR used from a forum member and I've been really happy with it and it has miles left on it as good as it runs, just had never heard of CSC or the RX3, a new one for me. As cheap as they are, if they keep their price point and prove themselves, I might think about one in the future. Whatever I get in the future, money will be important. I am not buying a new BMW GS, put it that way.
I'm retired now and on a fixed income. I don't do much touring anymore and was thinking the Honda CRF would be all I'd need now days, but the RX3 has some nicities, bags and such, and is, like the Honda, water cooled and injected and 4 valve head.
I'll sit back and watch, for now.