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    BMW R51/3
    Literature - Parts and Prices - Manuals - Gallery - Links

    The 500cc BMW 1952 BMW R51/3.

    Year of construction 1953
    Number sold 18.420
    Price 2.750.- DM

    Engine

    Internal designation 252 / 1
    Type four-stroke, horizontal four-cylinder in-line engine, liquid-cooled
    Bore/stroke 68 x 68 mm
    Cubic capacity 494 cm3 / 30 inches3
    Max power 24 HP at 5800 U /min
    Compression ratio 6.3 : 1
    Valves per cylinder ohv
    Carburation system 2 carburettor Typ Bing 1/24/149-1/24/150
    Engine lubrication forced-feed lubrication
    oil pump gear pump

    Power transmission

    Clutch single discs, dry
    Number of gears 4
    shifting foot shifting (+ auxiliary manual lever on the gear block)
    Gear ratios 4.0 / 2.28 / 1.7 / 1.3 (bis Ende 1951: 3.6 / 2.28 / 1.7 / 1.3)
    Rear wheel ratio 1 : 3.89 (with original BMW sidecar: 4.75 : 1)
    Bevel/crown wheel 9 / 35 teeth (with original BMW sidecar: 7 / 32)

    Electrical system

    Alternator Noris 6 Volt L 45/60 L
    Ignition magneto ignition
    Spark plugs Bosch W 240 T 1

    Suspension

    designation 251/3 (1951), 251/4 (1952/53), 251/4 (1954)
    Type of frame twin-loop steel tubular frame
    Front suspension telescopic fork
    Rear suspension telescopic fork
    wheel rims deep-bed 3 x 19
    Tires front 3.50 x 19
    Tires rear 3.50 x 19
    Brakes front drum brake, O 200 mm (1952: Duplex, 1954: full hub)
    Brakes rear drum brake, O 200 mm (1954: full hub)

    Dimensions and weights

    Length x width x height 84 x 31 x 39 inches / 2130 x 790 x 985 mm
    Wheel base 55 inches / 1400 mm
    Tank capacity 4.5 gals. / 17 liters
    Unladen weight, full tank 419 lbs. / 190 kg (with original BMW sidecar: 705 lbs. / 320 kg)
    load rating 783 lbs. / 355 kg (with original BMW sidecar: 1,322 lbs. / 600 kg)
    Fuel consumption 52 MPG (ca. 4.5 liters / 100 km)
    oil consumption ca. 0.7l / 1000 km
    Top speed 84 MPH / 135 km/h (with original BMW sidecar: 59 MPH / 95 km/h)

  • Service History Book :: [xsl]
  • Literature :: [BWM50s]
  • Parts and prices :: [Parts] / Online :: [Stemler - Ulis]
  • Other Parts & Memorabilia :: [1, 2, 3, 4]
  • BMW R51/3 Workshop Manuals ::[coming soon]
  • BMW R51/3 Owners Manual :: [coming soon]
  • BMW Manuals R models :: [>>]
  • Bing Carburetors - Technical Info :: [>>]
  • Spark Plugs :: [>>]
  • Helmets :: [coming soon]
  • Photo Album :: [1-2-3-4-5-6-7-8-9-10-11-12-13-14-15-16] :: [>>]

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