| MODEL | HARLEY-DAVIDSON FXS 1340 LOW RIDER 1979 - 1982 |
| Year | 1979 - 1982 |
| Engine Type | Four stroke, 45° V-twin, OHV, 2 valves per cylinder (Shovelhead) |
| Displacement / Capacity | 1337 cc / 81.5 cu in |
| Bore X Stroke | 88.8 x 108.0 mm |
| Compression Ratio | 7.4:1 |
| Cooling System | Air cooled |
| Max Power | 48.9 kW / 67 hp @ 5800 rpm |
| Max Torque | 90.8 Nm / 67 lb-ft @ 3600 rpm |
| Ignition | Electronic, battery and coil |
| Induction | 38 mm Keihin carburettor |
| Start System | Electric |
| TRANSMISSION SPECS | |
| Lubrication | Dry sump, external oil cooler |
| Gear Box | 4 Speed |
| Clutch | — |
| Final Drive | Chain |
| CHASSIS SPECS | |
| Frame | — |
| Front Suspension | Telescopic fork |
| Rear Suspension | Swingarm with dual shocks |
| Front Brakes | Dual discs |
| Rear Brakes | Single disc |
| DIMENSION SPECS | |
| Overall Length | — |
| Overall Width | — |
| Overall Height | — |
| Seat Height | 685 mm / 26.9 in |
| Wheelbase | — |
| Ground Clearance | — |
| Dry Weight | — |
| Wet Weight | 289 kg / 637.1 lbs |
| WHEEL SPECS | |
| Front Tyre | MT90-19 |
| Rear Tyre | MT90-16 |
| FUEL SYSTEM | |
| Fuel Capacity | 15 Litres / 4.1 US gal |
| Fuel Consumption | — |
| Top Speed | — |
This is the Low Rider with the bigger 80 cu in Shovelhead, bored and stroked over the original 1200 and tuned lean to meet US emission rules. It kept the solid-mounted FX chassis, four-speed gearbox and chain drive, but gained electronic ignition and an oil cooler. Period testers found it rough-running in traffic until the carburation was richened.
