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Motor antik BMW R25/3

ambi2

Ini sebenarnya foto beberapa waktu lalu ketika ada kopdar komunitas motor di Bojonegoro pertengahan 2011 silam. KHS awalnya bingung dengan jenis dan type motor ini namun setelah nanya pada mbah google diperoleh jawaban yakni motor BMW R25/3. KHS tidak paham apakah semuanya masih ori atau sudah gubahan di bagian tertentu motor gahar ini.

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

BMW R25/3

Click to View

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.

bmw R 25_3_09Monggo mantemans yang punya inpoh lanjut mengenai motor ini bisa dishare dimari. suwun

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