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

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 1940 BMW R66, a classic motorcycle that embodies the spirit of pre-war engineering and the iconic German craftsmanship that BMW is renowned for. Positioned in the allround category, the R66 caters to riders seeking both performance and versatility. This motorcycle strikes a harmonious balance between daily usability and spirited touring, making it a beloved choice among vintage enthusiasts and collectors alike. With its distinctive styling and robust build, the R66 is not just a mode of transportation; it’s a piece of history that speaks volumes about the evolution of motorcycle design. At the heart of the R66 lies a powerful two-cylinder boxer engine, displacing 596 cc and delivering an impressive 30.05 horsepower at 5,300 RPM. This four-stroke powerhouse is known for its smooth power delivery, allowing riders to experience a top speed of 145 km/h (90.1 mph). With a compression ratio of 6.8:1 and a 26mm carburettor fueling the fire, the engine’s performance is both responsive and reliable. Riders will appreciate the seamless operation of the 4-speed gearbox paired with a shaft drive (cardan), which enhances the overall riding experience by providing smooth acceleration and effortless gear transitions. Whether cruising along winding roads or navigating city streets, the R66 offers a riding experience that is both engaging and rewarding. The BMW R66 is not only known for its performance but also for its thoughtful engineering. The double steel loop frame enhances rigidity while remaining lightweight, contributing to the motorcycle's agile handling. The front and rear drum brakes, each measuring 200 mm in diameter, provide reliable stopping power, instilling confidence even in challenging conditions. The suspension system, featuring a cartridge front suspension and a twin shock swingarm at the rear, ensures a comfortable ride, absorbing bumps and imperfections along the way. With a fuel capacity of 14 liters (3.70 gallons), riders can enjoy longer journeys without frequent stops, making the R66 an excellent choice for weekend adventures. **

Pros

  • Exceptional Build Quality: The R66 showcases BMW's commitment to craftsmanship, ensuring durability and reliability.
  • Smooth Power Delivery: The boxer engine provides a unique riding experience with its low center of gravity and balanced weight distribution.
  • Classic Aesthetic Appeal: Timeless design and vintage charm make it a head-turner at any gathering.

Cons

  • Limited Speed for Modern Standards: While impressive for its time, the top speed may not satisfy those seeking high-performance thrills in today’s market.
  • Maintenance Needs: As with many vintage motorcycles, finding replacement parts and maintaining the R66 can require a dedicated effort.
  • Kick Start Only: The absence of an electric start may deter some riders accustomed to modern conveniences, making it less user-friendly for everyday use.

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)