At the heart of the 1948 Harley-Davidson FL touring motorcycle, Harley-Davidson utilizes a 1212 cc (74 cu in) air-cooled knucklehead v-twin engine layout. In factory specification, peak output is rated at 50 HP (36.5 kW) at 4,800 rpm, transferring power to the rear wheel through a 4-speed gearbox and chain final drive. With a specific output of 41.3 HP per liter, the engine character is prioritizing low-RPM tractability, mechanical longevity and relaxed throttle response over peak redline numbers.
On the scales, the FL measures 256 kg (564 lbs) dry, translating to a power-to-weight ratio of 0.2 HP/kg (5.12 kg per horsepower). Rider ergonomics and chassis geometry center around a 1 mm (0 in) wheelbase engineered for quick, flickable steering geometry. The 14.19-liter (3.7 US gal) fuel tank supports practical everyday commuting and weekend road stints, while factory top speed is listed at 161 km/h (100 mph).
Use this page to compare this motorcycle by its real specifications, not only by model name. Focus on the details that affect fit, comfort, handling, range and ownership.
Power
Compare engine output with similar motorcycles if acceleration, highway use or two-up riding matters.
Weight
Compare weight carefully because it affects low-speed handling, parking and confidence.
Fuel Capacity
Fuel capacity helps estimate touring range and how often you may need to stop.
Brakes
Brake setup is worth comparing if you ride in traffic, mountains or with a passenger.
Suspension
Suspension details can matter for comfort, road feel and long-distance riding.
Transmission
Transmission and final drive affect maintenance, smoothness and everyday usability.
