1976 BMW R100S
Frame no. 6163203

Collectors' Motorcycles and Motorcars at the Barber Museum|10 October 2020, 13:00 CDT|Birmingham, Barber Motorsports Museum

1976 BMW R100S
Frame no. 6163203

In the 1970s, while the motorcycle trend was 4-cylinders powered bike, especially with the huge presence of Japanese makers on the market, BMW engineers stayed true to themselves and kept developing their famous boxer-twin. The main instrument of engine development for the Bavarian company was to increase the bore diameter. The 750cc engines had a bore of 82mm, the 900, a bore of 90mm and finally, in 1977, to release their new 980cc engine, they took the bore to 94mm.

Not only did the new BMW R100 line was offering a bigger power to BMW riders, it was also fixing some mechanical-safety issues from the R90. For instance, BMW developed a whole system made of a spring-loaded flapper disc and a small baffle chamber in the crankcase, so oil would be contained inside the engine instead of just blowing everywhere. Other than this, the clutch was upgraded too, and more importantly, the frame was strengthened. The 38mm Dell'Ortos from the R90S were replaced by 40mm Bing constant-vacuum carburetors, offering a little less throttle response but a much better fuel economy and efficiency in terms of emission and riding. Just like the R90S, the R100S was offered with the small 'bikini' fairing, offering protection and aerodynamism so the rider could choose between a relaxed or spirited ride.

The bike here appears to be in good overall condition, and it will need recommissioning before being able to get on the road.

Saleroom notices

Please note that the Engine number is R100S 6163203 and the title is in transit.

Additional information

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