Back to Bike FinderYears: 1941 · 1940 · 1939 · 1938
BMW R66
1938Allround

BMW R66

Key specifications

Engine
596 cc
Power
30 HP
Fuel type
petrol
Fuel capacity
3.7 L
Transmission
4-speed
Front brakes
Expanding brake (drum brake)
Rear brakes
Expanding brake (drum brake)

Overview

Introducing the 1938 BMW R66: A Timeless Classic The 1938 BMW R66 stands as a remarkable testament to the engineering prowess of the pre-war era, embodying a perfect blend of style, performance, and reliability. Positioned as an all-round motorcycle, the R66 was designed for both everyday use and spirited touring, appealing to riders who sought adventure without compromising on comfort. With its iconic BMW boxer engine and a distinctive aesthetic, this motorcycle not only turned heads but also garnered a reputation for robust performance and durability in an age when reliability was paramount. Engine Performance and Riding Characteristics At the heart of the R66 lies a 596cc two-cylinder boxer engine, a hallmark of BMW motorcycles that delivers a satisfying 30.05 HP at 5300 RPM. This engine configuration not only enhances the bike's stability but also provides a unique character that riders adore. With a top speed of 145 km/h (90.1 mph), the R66 is not just about cruising; it offers enough power to engage the thrill-seeking enthusiast. The four-speed gearbox, paired with a smooth shaft drive, allows for seamless power delivery, making every ride an exhilarating experience, whether you're navigating city streets or embarking on longer journeys through the countryside. Key Features and Technology The R66 is equipped with a variety of features that contribute to its rideability and overall charm. Its double steel loop frame provides a robust chassis that can handle the rigors of the road, while the drum brakes (200 mm front and rear) ensure reliable stopping power. The suspension setup—featuring a cartridge front and twin-shock swingarm at the rear—offers a comfortable ride that adapts well to various road conditions. With its air-cooled engine and a kick starter, the R66 harkens back to a simpler time in motorcycling, where the rider's connection to the machine was paramount. The bike's fuel capacity of 14 liters (3.70 gallons) ensures that adventurers can cover significant distances before needing to refuel, making it an ideal companion for long rides. **

Pros

    Cons

    • Iconic Boxer Engine: The two-cylinder boxer engine not only provides excellent balance and stability but also delivers a unique riding experience that BMW enthusiasts cherish.
    • Timeless Design: With its classic lines and elegant aesthetics, the R66 is a head-turner that embodies the spirit of motorcycle heritage.
    • Reliable Performance: Known for its durability, the R66 offers a dependable ride, making it suitable for both daily use and weekend excursions.
    • Limited Power: With 30.05 HP, the R66 may feel underpowered for riders accustomed to modern high-performance machines.
    • Drum Brakes: While effective for their time, the drum brakes may not provide the stopping power or feedback expected by today’s riders.
    • Kick Starter: The absence of an electric starter can be a challenge for some riders, especially in less-than-ideal conditions or for those who prefer a more contemporary starting method.

    Technical details

    Source specification data

    Make
    BMW
    Model
    R66
    Category
    Allround
    Starter
    Kick
    Carrying Capacity
    210kg-500kg with sidecar
    Power
    30.05 HP (21.9 kW)) @ 5300 RPM
    Clutch
    Dry-single plate-cable operated
    Gearbox
    4-speed
    Ignition
    Forced feed
    Top Speed
    145.0 km/h (90.1 mph)
    Fuel System
    Carburettor. 26mm
    Bore X Stroke
    69.8 x 78.0 mm (2.7 x 3.1 inches)
    Compression
    6.8:1
    Displacement
    596.00 ccm (36.37 cubic inches)
    Cooling System
    Air
    Engine Details
    Two cylinder boxer, four-stroke
    Lubrication System
    Wet sump
    Transmission Type Final Drive
    Shaft drive (cardan)
    Fuel Capacity
    14.00 litres (3.70 gallons)
    Overall Width
    815 mm (32.1 inches)
    Overall Height
    960 mm (37.8 inches)
    Overall Length
    2,130 mm (83.9 inches)
    Weight Incl Oil Gas Etc
    187.0 kg (412.3 pounds)
    Seat
    Single seat
    Wheels
    Spoked
    Rear Tyre
    3.5-19
    Frame Type
    Doble steel loop
    Front Tyre
    3.5-19
    Rear Brakes
    Expanding brake (drum brake)
    Front Brakes
    Expanding brake (drum brake)
    Rear Suspension
    Twin shock-Swingarm
    Front Suspension
    Cartridge
    Rear Brakes Diameter
    200 mm (7.9 inches)
    Front Brakes Diameter
    200 mm (7.9 inches)