I've just bought a CRM 250 AR. The bike is very straight, all original stickers and 4,111kms on the clock which I believe to be genuine. Got it off a German guy, who had it for only 6 months or so, previous owner was a Thai. I was wondering how hard these bikes are to work on. My Thai mechanic is good, honest and not to pricy, so I would like to use him. The only concern is that he might not familiar with the AR engine, apparently it's fairly complicated for a 2 stroke? Is there anything worth checking on the bike to identify problems before they become major? Thanx.