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Harley-Davidson Model JD
1925Allround

Harley-Davidson Model JD

Key specifications

Engine
1208 cc
Power
12 HP
Weight
166 kg
Fuel type
petrol
Rear brakes
Expanding brake (drum brake)

Overview

Introducing the 1925 Harley-Davidson Model JD Step back in time to the roaring twenties, a period defined by innovation and a thirst for adventure, and meet the 1925 Harley-Davidson Model JD. This motorcycle epitomizes the spirit of its era, embodying the rugged charm and raw power that Harley-Davidson is renowned for. Positioned as an allround motorcycle, the JD was designed to appeal to a broad spectrum of riders, from those seeking leisurely rides to the more spirited enthusiasts eager to conquer the open road. The Model JD is not just a bike; it's a piece of history that remains a favorite among collectors and vintage motorcycle enthusiasts today. Engine Performance and Riding Characteristics At the heart of the Model JD lies a robust 1208 cc V2, four-stroke engine that delivers a modest yet spirited 12 horsepower. This powerplant, with its bore and stroke measurements of 86.9 mm by 101.6 mm, allows for a thrilling top speed of 136.8 km/h (85.0 mph). While it may not rival the high-performance machines of today, the JD offers an engaging riding experience characterized by its smooth power delivery and distinctive V-twin rumble. The chain final drive ensures efficient power transfer to the rear wheel, providing a responsive ride that perfectly complements the motorcycle's classic styling. Riders can appreciate the simplicity and reliability of its carburettor fuel system and H.D. generator ignition, both hallmarks of Harley-Davidson engineering. Key Features and Technology The 1925 Harley-Davidson Model JD is not merely a mechanical marvel; it's a testament to the era's engineering prowess. One standout feature is its expanding brake system, a drum brake design that enhances stopping power, providing an essential safety measure for the rider. With a weight of just 166 kg (366 pounds), the JD boasts an impressive power-to-weight ratio of 0.0723 HP/kg, making it surprisingly agile for its time. The combination of traditional styling elements and innovative features creates an iconic motorcycle that captures the essence of freedom and rebellion associated with the Harley-Davidson brand. **

Pros

    Cons

    • Classic Design: The Model JD showcases timeless styling that appeals to vintage motorcycle enthusiasts and collectors alike.
    • Engaging Ride: The V2 engine delivers a unique riding experience with its characteristic sound and smooth power delivery.
    • Historical Significance: Owning a Model JD connects riders with the rich heritage of Harley-Davidson and the early days of motorcycling.
    • Limited Power: With only 12 HP, the Model JD may feel underpowered compared to modern motorcycles, especially on highways.
    • Basic Technology: Riders accustomed to contemporary features may find the lack of advanced technologies such as disc brakes or fuel injection limiting.
    • Maintenance Needs: Vintage motorcycles require more frequent and specialized maintenance, which can be a challenge for the uninitiated.

    Technical details

    Source specification data

    Make
    Harley-Davidson
    Model
    Model JD
    Category
    Allround
    Power
    12.00 HP (8.8 kW))
    Ignition
    H.D generator
    Top Speed
    136.8 km/h (85.0 mph)
    Fuel System
    Carburettor
    Bore X Stroke
    86.9 x 101.6 mm (3.4 x 4.0 inches)
    Displacement
    1208.00 ccm (73.71 cubic inches)
    Engine Details
    V2, four-stroke
    Transmission Type Final Drive
    Chain
    Dry Weight
    166.0 kg (366.0 pounds)
    Power Weight Ratio
    0.0723 HP/kg
    Seat
    Single
    Wheels
    Spoked
    Rear Tyre
    3-23
    Front Tyre
    3-26
    Rear Brakes
    Expanding brake (drum brake)