.

BMW R 25

.  

Make Model

BMW R 25

Year

1950 - 51

Engine

Four stroke, single cylinder, pushrod operated, OHV, 2 valves per cylinder.

Capacity

247 cc / 15.1 cu in.
Bore x Stroke 68 x 68 mm
Compression Ratio

6.5:1

Cooling System Air cooled

Induction

1x Bing type 1/22/28

Ignition

Battery ignition 

Starting

Kick

Clutch Single plate, dry

Max Power

8.9 kW / 12 hp @ 5600 rpm

Transmission

4 Speed 

Final Drive

Shaft
Gear Ratio 1st 6.10 / 2nd 3.00 / 3rd 2.04 / 4th 1.54:1
Frame Closed steel twin loop frame, welded

Front Suspension

Telescopic fork

Rear Suspension Pushrod suspension, spring loaded saddle
Front Brake 160mm Drum

Rear Brakes

160mm Drum

Front Tyre

3.25 x 19"

Rear Tyre

3.25 x 19"

Wet-Weight

140 Kg / 308 lbs

Fuel Capacity 

12 L / 3.1 US gal
.