2021 Harley-Davidson Softail Slim Specification


Get the classic look of spoked wheels, chopped fenders and floorboards on the Softail Slim®. It’s 35 pounds lighter, with greater lean angle than Slim models from just a couple years ago. And it has the power and soul-satisfying sound of the Milwaukee-Eight® 107 V-Twin engine.

Technical Specification 

Model FLSL Softail Slim®
Dimensions
Length 90.9 in. (2,310 mm)
Overall Width 38.2 in. (970 mm)
Overall Height 43.1 in. (1,095 mm)
Seat Height, Laden 25.5 in. (648 mm)
Seat Height, Unladen 26 in. (660 mm)
Ground Clearance 4.7 in. (120 mm)
Rake (steering head) (deg) 30
Fork Angle (deg) 30
Trail 5.8 in. (147 mm)
Wheelbase 64.2 in. (1,630 mm)
Tires, Type Dunlop® Harley-Davidson Series, bias blackwall front and rear
Tires, Front Model D401F
Tires, Front Specification 130/90B16,73H,BW
Tires, Rear Model D401T
Tires, Rear Specification 150/80B1677H,BW
Fuel Capacity 5 gal. (18.9 l)
Reserve Fuel Capacity, Fuel Injection (warning light) 1 gal. (3.8 l)
Oil Capacity (w/filter) 5 qt. (4.7 l)
Transmission Capacity 1 qt. (.95 l )
Primary Chain Case Capacity 1.25 qt. (1.18 l )
Coolant Capacity N/A
Weight, As Shipped 642 lb. (291 kg)
Weight, In Running Order 671 lb. (304 kg)
Gross Vehicle Weight Rating 1,160 lb. (526 kg)
Gross Axle Weight Rating, Front 450 lb. (204 kg)
Gross Axle Weight Rating, Rear 730 lb. (331 kg)
Luggage Capacity -Volume N/A
Engine
Engine Milwaukee-Eight® 107
Valves Pushrod-operated, overhead valves
with hydraulic, self-adjusting lifters;
four valves per cylinder
Bore 3.937 in. (100 mm)
Stroke 4.374 in. (111 mm)
Displacement 107 cu in (1,746 cc)
Compression Ratio 10.0:1
Fuel System Electronic Sequential Port Fuel Injection (ESPFI)
Air Cleaner 8.5 in. round, center bolt cover with washable fiberglass filter media
Exhaust 2-into-2 shotgun; catalyst in muffler
Lubrication System Pressurized, dry-sump with oil cooler
Drivetrain
Primary Drive Chain, 34/46 ratio
Final Drive Belt, 32/66 ratio
Clutch Mechanical, 10 plate wet, assist & conventional
Transmission 6-Speed Cruise Drive®
Gear Ratios (overall) 1st 9.311
Gear Ratios (overall) 2nd 6.454
Gear Ratios (overall) 3rd 4.793
Gear Ratios (overall) 4th 3.882
Gear Ratios (overall) 5th 3.307
Gear Ratios (overall) 6th 2.79
Chassis
Frame Mild steel, tubular frame; rectangular section backbone; stamped, cast, and forged junctions; MIG welded; aluminum forged fender supports
Swingarm Mild steel, tubular sections, stamped x-member, forged axle junctions; MIG welded; removable belt spacer
Front Fork Dual-bending valve 49 mm telescopic with aluminum fork triple clamps; dual rate spring; "beer can" covers
Rear Shocks Hidden, free piston, coil-over monoshock; 43mm stroke; cam-style pre-load adjustment
Wheels, Front Type Gloss Black, Steel Laced
Wheels, Front Width 3 in. (76 mm)
Wheels, Front Height 16 in. (406 mm)
Wheels, Rear Type Gloss Black, Steel Laced
Wheels, Rear Width 3 in. (76 mm)
Wheels, Rear Height 16 in. (406 mm)
Brakes, Caliper Type 4-piston fixed front and 2-piston floating rear
Brakes, Rotor Type Solid, uniform expansion rotors
Brakes, Front Diameter 11.8 in. (300 mm)
Brakes, Front Thickness 0.2 in. (5.1 mm)
Brakes, Front is dual No
Brakes, Rear Diameter 11.5 in. (292 mm)
Brakes, Rear Thickness 0.23 in. (5.8 mm)
Brakes, Anti-Lock Braking System (ABS) Optional
Suspension Travel, Front 5.1 in. (130 mm)
Suspension Travel, Rear 3.4 in. (86 mm)
Performance
Engine Torque Testing Method J1349
Engine Torque 110 ft-lb (149 Nm)
Engine Torque (rpm) 3,000
Lean Angle Testing Method J1168
Lean Angle, Right (deg.) 27.4
Lean Angle, Left (deg.) 27.4
Fuel Economy Testing Method Estimated City/Hwy
Fuel Economy 47 mpg (5 l/100 km)
Electric
Battery Sealed, maintenance-free, absorbed glass mat (AGM) battery, 12V, 17.5Ah, 310 CCA at 0°F
Charging Three-phase, 42 Amp system (390 Watts @13 Volts, 1000 rpm, 546 Watts max power @ 13 Volts, 2000 rpm)
Starting 1.6 kW electric with solenoid shift starter motor engagement
Lights (as per country regulation), Headlamp All LED, low beam, high beam and signature position lamp
Lights (as per country regulation), Tail/Stop Incandescent bullets
Lights (as per country regulation), Front Signal Lights Incandescent bullets
Lights (as per country regulation), Indicator Lamps High beam, turn signals, neutral, low oil pressure, engine diagnostics, ABS (if equipped), security, low battery voltage, low fuel
Lights, Rear Turn Signals N/A
Gauges 5-inch analog speedometer with digital gear, odometer, fuel level, clock, trip, range and tachometer indication
Auxiliary Lamps N/A
Electric Power Outlet USB A-type; output 5V at 2.4A
GPS System N/A
Reverse Gear N/A
Warranty And Service
Warranty 24 months (unlimited mileage)
Service Interval First 1,000 miles (1600 km), every 5,000 miles (8,000 km) thereafter

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