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BMW R 63
|
Make Model |
BMW R 63 |
|
Year |
1928-29 |
|
Engine |
Air cooled, four stroke,
single cylinder vertical,
SV |
|
Capacity |
745 |
|
Bore x Stroke |
83 x 68 mm |
|
Compression Ratio |
6.2:1 |
|
Induction |
1x
Spezial 2 valve 24 mm carburetor |
|
Ignition /
Starting |
Bosch high voltage magneto ignition
/ Kick |
|
Clutch |
Single plate, dry |
|
Max Power |
24 hp @ 4000 rpm |
|
Transmission /
Drive |
3 Speed |
|
Gear Ratio |
1st 2.83 2nd 1.55 3rd 1.08 |
|
Frame |
Twin loop steel tubular frame |
|
Front Suspension |
Plate spring, 6 laminae |
|
Rear Suspension |
Rigid |
|
Front Brakes |
200mm drum |
|
Rear Brakes |
External shoe brake at the gearing on Cardan
shaft |
|
Front Tyre |
26 x 3.5 on 19 x 3 or 27 x 2.75 on 21 x 2.5 |
|
Rear Tyre |
26 x 3.5 on 19 x 3 or 27 x 2.75 on 21 x 2.5 |
|
Wet-Weight |
152 kg / 334 lb |
|
Fuel Capacity |
12.5 Litres /
3.3 gal |
This first o.h.v. 750 from BMW
in 1928 was effectively a development of the 500cc R57, and its oversquare,
83 x 68mm engine provided an exhilarating performance by the standards of
its day. The valve gear was completely enclosed, and although the
three-speed gearbox and the cycle parts were similar to those introduced on
the R32 five years earlier, everything was stronger. The front brake was
bigger and the rear brake was now a heel-operated device contracting around
a drum at the front end of the driveshaft.
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