Die BMW R 42 war das zweite Tourenmotorrad des deutschen Motorradherstellers BMW. Am 26. November 1925 präsentierte BMW zwei Jahre nach der R 32 auf der Deutschen Automobilausstellung in Berlin erstmals deren Nachfolgerin R 42 der Öffentlichkeit. [1] . BMW führte mit diesem Motorrad das Baukastenprinzip weiter.

The R42 was powered By an updated side-valve engine that produced 12 horsepower. This engine, the M43a, retained the "square- 68-miltimeter bore and stroke measurements, but new alloy cylinder heads and an improved carburetor increased performance.

2022年10月24日 · The renewed 494cc four-stroke air-cooled engine of the 1926 BMW R42 with a maximum power of 12 hp at 3,400 rpm, four more than on the R32, was spinning the rear wheel through a three-speed manual...

Its redesigned and more powerful 500cc engine, now with aggressively finned detachable alloy heads, made the bike a better tourer. With the engine repositioned in the frame for improved weight distribution, stronger, straighter front downtubes could …

The R 42 was the touring version with a 500cc sidevalve engine with developed 12 h.p. The frame and suspension remained almost entirely unchanged from the previous model, but the rear brake mounted on the drive shaft was a new feature. Sales of the new model more than doubled largely due to a price reduction of 30 per cent.

The BMW R 42 was a air-cooled, four-stroke, boxer twin cylinder, SV Classic motorcycle produced by BMW in 1926. Claimed horsepower was 11.94 HP (8.9 KW) @ 3400 RPM.

BMW R42 - this model was manufactured from 1926 to 1928. Its boxer-twin engine was based on earlier R32 design. 12 HP, 494 cc four-stroke two cylinder flat twin engine, 3 gears, Bosch magneto ignition.

BMW R42 Motorcycle model years, frame and engine serial numbers, documentation and specifications

2015年5月14日 · Packing a 494cc boxer twin that put out 12 horsepower, the BMW R42 was introduced in 1926, 3 years later after the R32 (the granddaddy of BMW boxers). The R42 got a bigger engine, stronger frame, and better brakes, but it was only sold for 3 years – making it quite a rarity, especially as the model line approaches its’ 90th birthday.

BMW R42 models include the 3 motorcycles below produced from 1926 to 1928. The 1928 BMW R42 motorcycle is used as an example on this page. It has a 494 ccm two cylinder boxer engine. The category is allround. The BMW R42 model variants with detailed specs: Get weekly lists of new motorcycles on Bikez!