2021 Harley-Davidson FLHXS Street Glide Special Parts & Accessories
Touring / Bagger
Milwaukee-Eight Touring (2017-Present)
1,053 parts available
264 Performance
161 Maintenance
628 Accessories
2021 Harley-Davidson FLHXS Street Glide Special
About the 2021 Harley-Davidson FLHXS Street Glide Special
The 2021 Street Glide Special is a performance-oriented bagger featuring the Milwaukee-Eight 114 V-Twin engine and a distinctive 'hot rod' aesthetic. This model year is notable for introducing a choice between blacked-out or bright chrome styling treatments and a move from a hydraulic to a cable-actuated clutch. It also features a new low-profile engine guard and a low-profile center console with a side fuel fill to further streamline its silhouette.
What Makes This Trim Special
- Finish Options — First year offering a choice between Blacked-out or Bright Chrome styling treatments.
- Wheels — Equipped with Prodigy cast aluminum wheels (Gloss Black or Black with Machined Highlights).
- Infotainment — Standard Boom! Box GTS system with 6.5-inch color touchscreen, navigation, Apple CarPlay, and Android Auto. (Road Glide Special)
- Saddlebags — Stretched saddlebags that wrap around the exhaust for a lower profile look.
- Engine Guard — New low-profile engine guard designed to emphasize the bike's slammed look.
- Arctic Blast Limited Edition — A limited run of 500 serialized units featuring a hand-painted metallic deep blue and white scheme by Gunslinger Custom Paint.
Key Specifications
| Engine |
Milwaukee-Eight 114 V-Twin Produces 118 ft-lb of torque at 3,250 RPM |
| Displacement | 114 cu in (1,868 cc) |
| Fuel System | Electronic Sequential Port Fuel Injection (ESPFI) |
| Cooling | Air and Oil cooled |
| Transmission |
6-Speed Cruise Drive Features a cable-actuated assist and slip clutch for 2021 |
| Drivetrain | Belt final drive; Chain primary |
| Front Suspension | 49mm Dual Bending Valve forks; 4.6 in travel |
| Rear Suspension | Premium low hand-adjustable emulsion shocks; 2.15 in travel |
| Front Brakes | Dual 300mm floating rotors, 4-piston fixed calipers (Brembo) |
| Rear Brakes | Single 300mm fixed rotor, 4-piston fixed caliper |
| Front Tire | 130/60B19 61H |
| Rear Tire | 180/55B18 80H |
| Weight | 827 lbs (375 kg) in running order |
| Seat Height | 27.2 in (unladen) |
| Fuel Capacity |
6 gal (22.7 L) Includes a 1-gallon reserve warning light |
Ownership at a Glance
What to know about maintaining a 2021 Harley-Davidson FLHXS Street Glide Special
Known Issues 3
Top reported problems from owners and mechanics
High
Engine Sumping
A condition where oil accumulates in the crankcase, causing power loss and potential engine damage. While largely resolved by 2020 with a new oil pump, some 2021 owners still report issues under sustained high-speed riding.
Medium
Brake Light Illumination Recall
NHTSA Recall 22V907: The brake lights may illuminate regardless of whether the rider applies the brakes, potentially confusing other drivers.
Low
Cable Clutch Fatigue
The switch from hydraulic to cable clutch in 2021 resulted in a heavier lever pull for some riders and requires more frequent maintenance.
Parts Most Owners Need
Performance Upgrades 264
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Moose Racing
All Balls Racing Fork Oil and Dust Seal Kits
$24.95 - $126.95
3 of 127 options fit
In Stock
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Maintenance Parts 161
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Moose Racing
All Balls Racing Wheel Bearing and Seal Kits
$24.95 - $84.95
4 of 197 options fit
In Stock
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Alloy Art
Alloy Art Mfg. Multi Rear Brake Caliper Mount
$797.95 - $850.95
4 of 4 options fit
In Stock
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Arlen Ness
Arlen Ness Big Sucker™ Stage I Air Filter Kits for M-Eight
$399.95 - $534.95
7 of 17 options fit
In Stock
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Accessories 628
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Frequently Asked Questions About the 2021 Harley-Davidson FLHXS Street Glide Special
Yes, it uses Electronic Sequential Port Fuel Injection (ESPFI).
The 2021 model year switched to a cable-actuated clutch from the previous hydraulic system.
The Special features the larger 114ci engine (vs 107ci), stretched saddlebags, Prodigy wheels, the Boom! Box GTS infotainment system, and a gloss black inner fairing.
It takes approximately 5.2 quarts (4.9 liters) of oil with a filter change.
Yes, the standard Boom! Box GTS system supports both, though a WHIM (Wireless Headset Interface Module) or a wired headset is typically required for full functionality.
The most notable recall is for a brake light software issue (22V907) where lights could stay on unintentionally.
The unladen seat height is 27.2 inches, while the laden seat height (with a 180lb rider) is 26.1 inches.
Yes, 2021 was the first year the Street Glide Special was offered with a choice of either Chrome or Blacked-out finishes.
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