BMW R 39
|BMW R 39|
air-cooled, four-stroke, single vertical cylinder, OHV
|Bore / Stroke||67.8mm x 67.8mm|
|Horsepower||6.03 HP (4.5 KW) @ 4000RPM|
|Transmission||Gear box: 3 speed, manual
Final Drive: shaft
|Suspension||Front: plate spring, 4 laminae
Rear: hard-tail, sprung seat
|Brakes||Front: 150mm drum
Rear: external shoe brake at the gearing (on cardan shaft)
|Front Tire||27 x 3.5|
|Rear Tire||27 x 3.5|
|Length||80.0 inches (2032 mm)|
|Width||30.98 inches (787 mm)|
|Weight||110.0 kg (wet)|
The bike has a 3 speed, manual transmission. Power was moderated via the dry, single plate.
It came with a 27 x 3.5 front tire and a 27 x 3.5 rear tire. Stopping was achieved via 150mm drum in the front and a external shoe brake at the gearing (on cardan shaft) in the rear. The front suspension was a plate spring, 4 laminae while the rear was equipped with a hard-tail, sprung seat.
1925 - 1927 BMW R 39
The 1925 BMW R 39 sports an air-cooled, four-stroke, 247cc, single vertical cylinder engine paired to a three-speed manual transmission and can produce 6.5 horsepower at 4000 rpm. Furthermore, this machine came standard with laced wheels, whitewall tires, a plate string front fork, a rigid rear suspension with a single, sprung saddle, a rear luggage rack, a small headlight, a short exhaust and tipped the scale, fully-fueled at just 110 kg.