At the heart of the 2021 Harley-Davidson Heritage Classic custom - cruiser motorcycle, Harley-Davidson utilizes a 1746 cc (106.5 cu in) air-cooled v2, four-stroke layout. In factory specification, peak output is rated at 86 HP (62.8 kW) at 5,020 rpm while maximum torque reaches 147.8 Nm (109 lb-ft) at 3,000 rpm, transferring power to the rear wheel through a 6-speed gearbox and belt final drive. With a specific output of 49.3 HP per liter and a 2,020 rpm working window between peak torque (3,000 rpm) and peak power (5,020 rpm), the engine character is prioritizing low-RPM tractability, mechanical longevity and relaxed throttle response over peak redline numbers.
On the scales, the Heritage Classic measures 330.2 kg (728 lbs) wet (curb), translating to a power-to-weight ratio of 0.26 HP/kg (3.84 kg per horsepower). Rider ergonomics and chassis geometry center around a 668 mm (26.3 in) seat height — giving shorter riders and urban commuters confident flat-foot reach at traffic stops, combined with a 1,630 mm (64.2 in) wheelbase engineered for planted straight-line stability. The 18.9-liter (5 US gal) fuel tank paired with a rated consumption of 5 L/100 km provides an estimated theoretical range of roughly 378 km (235 miles) between fill-ups.
Within MotoLibrary's Harley-Davidson archive, this model family spans 6 indexed model years from 2020 to 2026, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.
Specific Output
49.3 HP/L
Power-to-Weight
0.26 HP/kg (3.84 kg/HP)
Power Band Window
3,000–5,020 rpm
Theoretical Range
~378 km (235 mi)
Engine
Displacement1746.0 ccm (106.54 cubic inches)
Engine TypeV2, four-stroke
Engine DetailsMilwaukee-Eight® 107
Power86.0 HP (62.8 kW)) @ 5020 RPM
Torque147.8 Nm (15.1 kgf-m or 109.0 ft.lbs) @ 3000 RPM
Compression10.0:1
Bore x Stroke100.0 x 111.1 mm (3.9 x 4.4 inches)
Fuel SystemInjection. Electronic Sequential Port Fuel Injection
Fuel ControlDouble Overhead Cams/Twin Cam (DOHC)
CoolingAir
Transmission
Gearbox6-speed
Final DriveBelt (final drive)
ClutchMulti-plate with diaphragm spring in oil bath
DrivelinePrimary chain, 34/46 ratio
Performance
Fuel Consumption5.00 litres/100 km (20.0 km/l or 47.04 mpg)
Greenhouse Gases116.0 CO2 g/km. (CO2 - Carbon dioxide emission)
Exhaust2-into-2 shorty dual; catalyst in muffler
Chassis
Rake30.0°
Trail140 mm (5.5 inches)
Front SuspensionTelescopic fork
Rear SuspensionTwin shocks
Wheelbase1630 mm (64.2 inches)
Ground Clearance120 mm (4.7 inches)
Wheels & Brakes
Front Tyre130/90-B16
Rear Tyre150/80-B16
Front BrakesSingle disc. ABS. 4-piston
Rear BrakesSingle disc. ABS. 2-piston floating.
WheelsChrome Steel Laced
Dimensions & Weight
Dry Weight316.2 kg (697.0 pounds)
Weight incl.330.2 kg (728.0 pounds)
Power/Weight0.2720 HP/kg
Seat Height668 mm (26.3 inches) If adjustable, lowest setting.
Overall Length2415 mm (95.1 inches)
Fuel Capacity18.90 litres (4.99 US gallons)
Oil Capacity4.70 litres (4.97 US quarts)
Other
StarterElectric
Color OptionsVivid Black, Black Jack Metallic, Billiard Teal, Deadwood Green/Vivid Black, Midnight Crimson Red/Stone Washed White Pearl
Instruments5-inch analog speedometer with digital gear, odometer, fuel level, clock, trip, range and tachometer indication
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.
Torque
Torque is useful for judging real-world pull, especially for touring, commuting and loaded riding.
Seat Height
Check the seat height against your inseam and riding posture before choosing a motorcycle.
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.
