This is the one. There are many many BMW airheads out there but this was the pinnacle of the range. This is a Twin spark R100RS, I removed all the massive fairing and have lightly customed to bring out the beauty underneath. It comes with TWO seats, the original twin but also the rare single, both of them and the tank come with the racing BMW enamel emblem. I had the 1000c race engine totally rebuilt with all the exotic coated parts in 2016 for $6000 with Dave Ranalli of Superior Boxer in Oakland (all the receipts from push rods to extended sump etc). Fitted a reconditioned low mileage gearbox (but have the original as a spare incase you want to keep the numbers clean). Changed the front fender for a shorter reproduction but had it painted and pin striped to match the bike exactly, added a racing brace for stability. Had Sun aluminum rims laced at Buchanans with anodized blue nipples to copy the hand painted racing strip of the original $900 (which I have as spares – rare as hens teeth). De tabbed the sub frame and moved a gel Odyseey PC680 battery to under slung rack by Untitled Motorcycles SF $250. I removed the old pegs and fitted Tarozzi mid sets for a better ride position (but have all the original parts and rear foot pegs as spares). Fitted Cone engineering stainless steel exhausts $250 (loud but safe). I removed all the ugly ass rear end (all spares) and designed a folded metal license holder complete with Ultra bright LED rear brake and Oxford seventies style modern turn signals. Designed a rear wheel Hugger to keep the dirt off the engine mat black powder coated (have the original inner rear guard as spare). Youtube. https://youtu.be/9CCQaPyYiQo This is a fantastic bike I would have loved to re do the electrics and powder coat the sub frame but that’s for you to tinker with, Known faults the stop button does not work but apart from that all sound, reliable and fun as.