Production Model Years
1923 - 1926
Frame and Engine Numbers
1001 - 4100 / 31000 - 34100
Model Specifications
Drivetrain
Displacement 494cc
Cylinders 2
Bore x Stroke (mm) 68 x 68
HP @ RPM 8.5 @ 3300
Compression Ratio 5.0:1
Valves Sidevalve, 2 per cylinder
Clutch Dry, single plate, cable operated
Transmission 3 speed, hand shifted
Final Drive Driveshaft
Running Gear
Frame Tubular, brazed double loop
Front Suspension Undamped, trailing link, dual leaf spring
Rear Suspension Rigid
Front Brakes 150mm drum, single leading shoe (early models had no front brakes)
Rear Brakes V-block pressed into dummy rim sheave, heel operated
Electrical
Ignition Bosch magneto
Spark Plugs Bosch M145
Generator Optional Bosch magneto/generator, 6V 35W
Capacities & Measurements
Weight 122kg
Fuel 14l
Wheelbase 1380mm
Top Speed 95kph
Number Produced 3090

In an era when motorcycles still closely resembled the bicycles they derived from, the purpose designed and built R32, with its double loop frame and shaft drive really stood out from the crowd. Even though BMW had already been building proprietary motors for half a dozen motorcycle producers for a few years, their decision to put the cylinders across the frame made an existing concept fresh.

Introduced at the Berlin Motor Salon, the first units didn't appear until late in 1923.

Comments

M2B15 Manual

Darryl.Richman's picture

Although not exactly the motor that went into the R32, here is the official manual for the preceding motor, which was sold to other motorcycle manufacturers such as Victoria of Nuremburg (for their KR-1 model).

PreviewAttachmentSize
bayern-kleinmotor.pdf5.16 MB

--Darryl Richman
http://darryl.crafty-fox.com
"Bling is not made in Germany" --OTL, 12/05

M2B15

guest's picture

This is what I get when I try to see the manual.

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