Production Model Years
1950 - 1951
Frame and Engine Numbers
516001 - 521005 / 516001 - 521005
Model Specifications
Drivetrain
Displacement 494cc
Cylinders 2
Bore x Stroke (mm) 68 x 68
HP @ RPM 24 @ 5800
Compression Ratio 6.4:1
Valves OHV, 2 per cylinder
Clutch Dry, single plate, cable operated
Transmission 4 speed, foot shifted
Final Drive Driveshaft
Running Gear
Frame Tubular steel double cradle
Front Suspension Hydraulically damped telescopic fork
Rear Suspension Plunger
Front Brakes 200mm drum, single leading shoe
Rear Brakes 200mm drum, single leading shoe
Electrical
Ignition Battery/coil
Spark Plugs Bosch W240
Generator Bosch RD 45/6/2400 6V 45W
Capacities & Measurements
Weight 185kg
Fuel 14l
Wheelbase 1400mm
Top Speed 140kph
Number Produced 5006

First postwar twin.

Comments

R51/2 frame

guest's picture

where is the frame no; stamped on this model.(exact osition pl;)

R51/2 frame number location

VintageSalesandRestorations's picture

It is stamped into the upper plunger mounting arm on the left (Clutch lever) side of the machine.

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