Harley-Davidson Model KR
1953Sportbike

Harley-Davidson Model KR

Key specifications

Engine
743 cc
Power
37 HP
Fuel type
petrol
Fuel capacity
4.5 L
Transmission
4-speed
Front brakes
Expanding brake (drum brake)
Rear brakes
Expanding brake (drum brake)

Overview

Introducing the 1953 Harley-Davidson Model KR, a motorcycle that stands as a testament to the golden age of American racing. Specifically designed for the sport category, the Model KR was engineered to dominate the dirt tracks and road racing circuits of its time. With its iconic styling and robust performance, it captured the hearts of enthusiasts and laid the groundwork for Harley-Davidson's storied legacy in competitive racing. As a true racing model, the Model KR appealed to those who craved speed and agility, making it an essential piece for riders looking to carve their name in the annals of motorcycle history. At the heart of the Model KR lies a powerful V2, four-stroke engine with a displacement of 743 cc (45.34 cubic inches), capable of delivering an impressive 37 HP (27 kW). This powerhouse is mated to a 4-speed gearbox, allowing riders to harness its full potential as they navigate through winding roads or charge down straightaways. With a top speed of 129 km/h (80.2 mph), the Model KR is no slouch, offering an exhilarating ride that keeps the adrenaline pumping. The bike’s bore and stroke measurements of 70.0 x 97.0 mm (2.8 x 3.8 inches) reflect a design focused on balance and torque, making it both agile and responsive. Its air-cooled nature ensures reliability under pressure, while the carburettor fuel system provides the necessary power needed for those competitive bursts. The Model KR isn't just about raw power; it comes with a host of features that enhance the riding experience. The steel single downtube frame ensures rigidity and stability, while the front and rear drum brakes provide consistent stopping power—vital for any racer navigating tricky corners. With a fuel capacity of 17 liters (4.49 gallons), riders can enjoy longer stretches of racing without frequent stops for refueling. The classic kick starter adds to the vintage charm, while the bike's overall design embodies the rugged spirit of the era. As a racing model, the KR not only delivers on performance but also stands out as a piece of history that any motorcycle enthusiast would be proud to own. **

Pros

  • Strong Performance: The 743 cc engine delivers ample power and speed, making it a thrilling ride for racing enthusiasts.
  • Iconic Design: The Model KR's vintage aesthetics and racing pedigree provide a unique appeal that stands out in any collection.
  • Rider Engagement: The 4-speed gearbox and classic kick starter create an engaging and authentic riding experience.

Cons

  • Limited Comfort: The sport-focused design may compromise comfort on longer rides, making it better suited for short sprints or races.
  • Maintenance Needs: As a vintage bike, it may require more frequent maintenance and care compared to modern motorcycles.
  • Braking Performance: While drum brakes were standard for the time, they may not provide the stopping power or responsiveness that contemporary riders expect.

Technical details

Source specification data

Make
Harley-Davidson
Model
Model KR
Category
Sport
Starter
Kick
Comments
Racing model.
Electrical
6 Volt
Power
37.00 HP (27.0 kW))
Gearbox
4-speed
Top Speed
129.0 km/h (80.2 mph)
Engine Type
Flathead 45 degree engine
Fuel System
Carburettor
Bore X Stroke
70.0 x 97.0 mm (2.8 x 3.8 inches)
Displacement
743.00 ccm (45.34 cubic inches)
Cooling System
Air
Engine Details
V2, four-stroke
Exhaust System
2-into-1 chrome
Transmission Type Final Drive
Chain
Oil Capacity
2.80 litres (0.18 quarts)
Fuel Capacity
17.00 litres (4.49 gallons)
Seat
Solo seat
Wheels
Wire
spoked.
Goodyear
or
Firestone
tyres.
Rear Tyre
3.50-19
Frame Type
Steel single downtube
Front Tyre
3.25-19
Rear Brakes
Expanding brake (drum brake)
Front Brakes
Expanding brake (drum brake)