I'm a member of the Washington DC Area Vintage Motorcycle Riders (http://autos.groups.yahoo.com/group/DC_BMW/
), which is a BMW-centric club.
As an aside, we don't have BMW in the club name because the clowns at BMWNA sicced their law firm on us - our assumption is that because the owners of vintage bikes are unlikely to buy a new bike, BMWNA is happy to jerk us around.
One of our members is Richie Grinspun. Richie is a mechanic at a local shop, and does side work out of his garage. I suspect you could buy an hour of his time to look at the bike. PM me if you want his contact info.
Non omnes qui habent quadrigae sunt auriga. - Anon
I returned, and saw under the sun, that the race is not to the swift, nor the battle to the strong, neither yet bread to the wise, nor yet riches to men of understanding, nor yet favour to men of skill; but time and chance happeneth to them all.