BMW R 25

BMW R 25

Motor yang diproduksi tahun 1950 an mempunyai spesifikasi sebagai berikut (diambil dari http://www.bmbikes.co.uk/specpages/R25-3.htm):

Start of Production	1953
End of Production	1956
Numbers Produced	47,700
Price	2,060 DM
Engine
Internal Designation		224/4
Motor Type		Four-stroke single cylinder vertical
Bore x Stroke		68 x 68 mm (2.67 x 2.67 in)
Displacement		247 cc
Max Power		13 hp at 5,800 rpm
Compression Ratio		7.0 : 1
Valves		OHV
Carburation System		1 x Bing type 1/24/41 or SAWE type K 24 F
Engine Lubricating System		Forced feed lubrication
Oil Pump		Gear pump
Power Transmission
Clutch		Single plate, dry
Number of Gears		4
Shifting		Foot switching (+ auxiliary manual switch on gearing block)
Gearbox Ratios		6.1 / 3.0 / 2.04 / 1.54
Rear Wheel Ratio		4.16 : 1 (with sidecar 4.8 : 1)
Bevel/Crownwheel		6 / 25 teeth (with sidecar 5 / 24)
Electrical System
Ignition System		Battery ignition
Generator		Noris ZLZ 60/6/1600 L
Spark Plugs		Bosch W 240 T1
Chassis
Designation		225/3
Frame		Closed steel twin loop frame, welded
Front wheel suspension		Telescopic fork
Rear wheel suspension		Telescopic suspension
Wheel rims		3 x 18 deep bed
Tyres, Front		3.25 x 18
Tyres, Rear		3.25 x 18
Brakes, Front		Drum brake 160 mm / 6.29 in diameter
Brakes, Rear		Drum brake 160 mm / 6.29 in diameter
Dimensions/Weights
Length x Width x Height		2065 x 760 x 730 mm (81.29 x 29.92 x 28.74 in)
Wheel Base		1365 mm / 53.74 in
Fuel Tank Capacity		12 litres / 2.63 gal / 3.17 gal US
Unladen Weight with Full Tank		150 Kg / 330 lb
Permitted Weight Limit		320 Kg / 704 lb (with original sidecar 450Kg / 991 lb)
Clearance		92 mm / 3.62 in
Idle/Riding Noise		82/84 phon
Fuel Consumption		Approx. 2.9 litres per 100 Km / 97 mpg / 81 mpg US
Oil Consumption		Approx. 0.7 litres per 1,000 Km
Top Speed		119 Kph / 73 mph (with original sidecar 88 Kph / 54 mph)

Melihat spesifikasi diatas motor ini 250 cc, beratnya 150 kg, tangki 12 liter, 4 percepatan (gear) dan topspeed yang bisa digeber 119 kph. Sedangkan yang konsumsi BBMnya sepertinya cukup irit dimana 100 km hanya menghabiskan 2,9 liter saja.

Monggo mantemans yang punya inpoh lanjut mengenai motor ini bisa dishare dimari. suwun