As of today I changed 4 rectifier-regulators (all burned out) and still the bike has problems starting. It's either this or that. Either the battery doesn't charge or it gets overcharged and the electric flow burns the RR straight away.
On the positive side: we fit a carbon fiber exhaust on it, sounds better. I also wrapped the exhaust with the heat shield cloth (front and middle). We also fit a Boyesen high-speed pump on it (from eBay).
On the negative side: Boyesen pipe and heat shield didn't really affect how hot the bike runs and it still runs terribly uncomfortably hot in summer.
By this moment I am totally disappointed with the bike, its reliability, its parts quality and non-availability of replacement parts in Nanjing. I don't know if it's worth it keeping it on the road hoping it doesn't fail during that work-home ride. Maybe I should just get a barrel of #97 gas and burn it somewhere out in the field.