Chang Jiang is an option
While Butch is mostly correct, there is a fix and a responsible dealer in Beijing that can absolutely provide a solution.
My wife and I leave Changchun in NE China on July 17 on our RTW on a Chang that has had a BMW R75/5 engine installed by Jim Bryant at Frank's Classic Sidecars. The resulting bike has none of the mechanical/electrical problems of the Chang, yet retains all the charm and stamina of the Chang/R71.
We are so sure of the bike's reliability that we will cross Mongolia (very slowly and very carefully) on the first leg of the ride. In total we will travel 75,000 km and visit some 30-40 countries (see www dot draginrun dot com).
The Chang is a sidecar rig and that affords us the opportunity to carry what we need for a 14-16 month ride.
Of course the bike is substantially more $$$ with the BMW engine but then the total cost of our bike, with all of the mods, is still a far cry from what you will pay for even an older GS type bike. Further, BMW repairs should be available almost anywhere.
If you are interested, visit Frank's Classic Sidecars at www dot mycj750 dot com, could be a real answer. Tell'em Flashy sent ya.
On the road,
Jack & Janet