2018年2月13日 · As you might guess, the R5SS was followed by an R51SS production-based racer. The newer model touted more than just new rear suspension, too. The engine utilized a pair of angry 6/432 Amal/Fischer 24mm carburetors that fed an engine with a slightly higher compression ratio of 8:1.

BMW had produced limited run Super Sport models with the R5SS and the R51SS in 1938. For 1939, the race division at BMW was tasked to create a competitive 500 cc machine, on par or better than the Norton, for the best private German racers.

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2025年2月1日 · BMW responded by offering two types of racers: the R51SS (SuperSport), basically a tuned-up and stripped-down standard roadster available to the public (with about …

The 1938 BMW R51 is essentially an updated sprung version of the groundbreaking R5. This motorcycle is an incredible addition to my collection. As the sole licensed importer for BMW, AFN only imported 217 motorcycles into England between 1935 and 1939. Thanks to Robert’s help, I now own three of these highly documented original AFN bikes.

Dutchman Piet Knijnenberg was a factory sponsered rider for BMW. He was well known for racing his R51RS pre-war, and post-war he went on to successfully campaign a factory RS54. It is likely that Knijnenberg helped van Rest convert the front hub of the R5 SS from simplex to doppel-simplex as the same exact configuration is seen on Knijnenbergs ...

2024年12月6日 · The R51 was the base model for two competition versions such as the R51 SS (Super Sport), with four hp more and a top speed of 160 kph (99 mph), and the R51 RS (Renn Sport), which had a...

2006年5月14日 · One day I went over and he had a "late model" (This was in 1969) BMW R bike with a interesting engine in it. Seems someone had found a pre-war BMW factory racing engine, complete with original supercharger, and had Hans transplant it in their late model frame.

2012年1月22日 · The R51RS in 1939 followed the R51SS of 1938 and R5SS previous to that. The R51SS was also based on the production R51 with more modest tweaks than the RS. The SS used the standard chain driven cams that the production bike used.

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