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BMW R4 1932 forward

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Engine and transmission
Engine type: 1 cylinders, 4-stroke, Single
Displacement: 398 cc (24.32 cubic inches)
Bore × stroke: 3.07 inch × 3.31 inch (undersquare - longstroke)
Cooling system: Air cooled
Power: 11.96 HP (8.8 kW) @ 4000 rpm
Throttle: Cable operated
Valves
Valve train: OHV, variable
Valves per cylinder: 2
Fuel and ignition
Sparks per cylinder: 1
Fuel supply system: Carburetor
Compression: 5.7:1
Engine mounting: Vertical
Lubrication system: Wet sump
Gear box: Manual 3-speed
Clutch: Dry, single plate, cable operated
Final drive: Shaft
Spark plug pipe type: Bosch, DM 175/1
Starter: Kick-starter
Dimensions
Physical measures
Length: 78 inch
Width: 33.5 inch
Height: 37.4 inch
Wheel base: 51.2 inch
Weight
Curb weight: 302 lbs
Chassis and suspension
Frame type: steel, Single cradle frame
Front
Suspension: Leading link
Brake: Single Drum, Ø7.09 inch
Tire: 3.5 × 26
Rear
Brake: Drum, Ø7.09 inch
Tire: 3.5 × 26
Other
ABS available: No
Power-to-weight ratio: 0.06 KW/lbs (15.57 lbs/HP)
Top speed: 62.14 mph
Fuel capacity: 2.64 gals
Number of riders: 1 person

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Related groups

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1963 AJS Model 8 350 Classic Air cooled, 348cc, Single, OHV
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