| MODEL | HARLEY-DAVIDSON FL KNUCKLEHEAD TYPE 74 1946 |
| Year | 1946 |
| Engine Type | Four stroke, 45° V-twin, OHV |
| Displacement / Capacity | 1207 cc / 74 cu in |
| Bore X Stroke | — |
| Compression Ratio | — |
| Cooling System | Air cooled |
| Max Power | 39.5 kW / 53 hp @ 6000 rpm |
| Max Torque | — |
| Ignition | Battery and coil |
| Induction | Single Linkert carburettor |
| Start System | — |
| TRANSMISSION SPECS | |
| Lubrication | Pressure lubrication |
| Gear Box | 4 Speed |
| Clutch | — |
| Final Drive | Chain |
| CHASSIS SPECS | |
| Frame | Double cradle |
| Front Suspension | Springer forks |
| Rear Suspension | Rigid |
| Front Brakes | Drum |
| Rear Brakes | Drum |
| DIMENSION SPECS | |
| Overall Length | — |
| Overall Width | — |
| Overall Height | — |
| Seat Height | — |
| Wheelbase | — |
| Ground Clearance | — |
| Dry Weight | 258 kg / 569 lbs |
| Wet Weight | — |
| WHEEL SPECS | |
| Front Tyre | — |
| Rear Tyre | — |
| FUEL SYSTEM | |
| Fuel Capacity | — |
| Fuel Consumption | — |
| Top Speed | 177 km/h / 110 mph |
The FL was the 74 cubic inch big brother of the 1936 EL Knucklehead, added in 1941, with the L marking the higher-compression sport version. The 1946 bike was one of the first post-war civilian models, still with the springer fork, rigid rear end, four-speed gearbox and pressure-fed lubrication. It was the last stretch for the Knucklehead before the Panhead engine took over for 1948.
