2021 Harley-Davidson FLHX Street Glide Parts & Accessories
Touring / Bagger
Milwaukee-Eight Touring (2017-Present)
1,089 parts available
262 Performance
157 Maintenance
670 Accessories
2021 Harley-Davidson FLHX Street Glide
About the 2021 Harley-Davidson FLHX Street Glide
The 2021 Street Glide is a foundational 'hot-rod bagger' featuring the Milwaukee-Eight 107 V-Twin engine and the iconic fork-mounted batwing fairing. This model year is most notable for Harley-Davidson's return to a cable-actuated clutch, replacing the hydraulic system used since 2014, and the introduction of a new Euro 5-compliant diagnostic port. It serves as the entry point to the Grand American Touring lineup, offering a more traditional chrome-heavy aesthetic compared to its 'Special' and 'CVO' counterparts.
What Makes This Trim Special
- Engine Displacement — Standard FLHX uses the 107ci engine; Special (FLHXS) and CVO (FLHXSE) use the 114ci and 117ci respectively.
- Wheels — Standard features Enforcer II Cast Aluminum wheels; Special features Prodigy wheels.
- Headlight — Standard comes with a Dual Halogen headlamp; Special and CVO come with LED Daymaker lamps.
- Infotainment — Standard features the Boom! Box 4.3 (non-touch); Special features the Boom! Box GTS 6.5" touchscreen with navigation.
- Saddlebags — Standard has standard-length bags; Special has 'stretched' bags that wrap around the exhaust.
- Finish — Standard is chrome-only; Special offers a choice of Chrome or Blacked-out finishes.
Key Specifications
| Engine |
Milwaukee-Eight 107 V-Twin Bore x Stroke: 3.937 in x 4.375 in; 111 ft-lb torque @ 3,250 RPM |
| Displacement | 1,746 cc (107 cu in) |
| Fuel System | Electronic Sequential Port Fuel Injection (ESPFI) |
| Cooling | Air/Oil Cooled |
| Transmission |
6-Speed Cruise Drive with Cable-Actuated Assist & Slip Clutch 2021 marked the return to a cable clutch from the previous hydraulic system |
| Drivetrain | Belt Final Drive (32/68 ratio) |
| Front Suspension |
49mm Dual Bending Valve (DBV) telescopic forks Non-adjustable front forks |
| Rear Suspension |
Premium low-profile hand-adjustable emulsion shocks Single-knob preload adjustment on the left side shock |
| Front Brakes | Dual 300mm floating rotors with 4-piston fixed Brembo calipers |
| Rear Brakes | Single 300mm fixed rotor with 4-piston fixed Brembo caliper |
| Front Tire | 130/60B19 61H |
| Rear Tire | 180/55B18 80H |
| Weight | 829 lb (In running order) |
| Seat Height | 26.1 in (Laden) |
| Fuel Capacity | 6.0 gal |
Ownership at a Glance
What to know about maintaining a 2021 Harley-Davidson FLHX Street Glide
Known Issues 4
Top reported problems from owners and mechanics
High
Plastic Clutch Adjuster Failure
The inline self-adjuster is made of plastic and can fail, causing the clutch to lose all tension.
Medium
Stiff / Inconsistent Cable Clutch
Owners report the 2021 cable clutch feels heavier than the previous hydraulic system and requires frequent adjustment.
Medium
Aftermarket Tuner Compatibility
A change in the ECM data port for 2021 made many existing tuners (like older Vance & Hines FP3) incompatible without new hardware.
Parts Most Owners Need
Performance Upgrades 262
Fits
Fits
Fits
Fits
Fits
Moose Racing
All Balls Racing Fork Oil and Dust Seal Kits
$24.95 - $126.95
3 of 127 options fit
In Stock
Fits
Fits
Fits
Fits
Fits
Fits
Fits
Maintenance Parts 157
Fits
Fits
Fits
Moose Racing
All Balls Racing Wheel Bearing and Seal Kits
$24.95 - $84.95
4 of 197 options fit
In Stock
Fits
Alloy Art
Alloy Art Mfg. Multi Rear Brake Caliper Mount
$797.95 - $850.95
4 of 4 options fit
In Stock
Fits
Fits
Fits
Fits
Fits
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
Fits
Fits
Fits
Accessories 670
Fits
Fits
Fits
Fits
Fits
Fits
Fits
Fits
Fits
Fits
Fits
Fits
Arlen Ness
Arlen Ness Adjustable Driver and Passenger Floorboards
$624.95 - $889.95
2 of 6 options fit
In Stock
Frequently Asked Questions About the 2021 Harley-Davidson FLHX Street Glide
It has a cable clutch. Harley-Davidson switched back to a cable system for all touring models starting in 2021.
The Special has a larger 114ci engine, stretched saddlebags, Prodigy wheels, an LED headlight, and the Boom! Box GTS touchscreen as standard.
It takes approximately 5.2 quarts (4.9 liters) of oil when changing the filter.
Yes, it uses Electronic Sequential Port Fuel Injection (ESPFI).
No, the Street Glide does not come with a factory reverse gear. Aftermarket mechanical reverse kits are available.
Likely no. The 2021 models use a new 6-pin diagnostic port and updated ECM protocols that require 2021-specific tuners.
It typically uses a 30L-BS or 66010-97D style AGM battery.
There is a hand-adjustable knob located behind the left-side saddlebag. No tools are required.
Looking for parts for a different ride?
Browse our full catalog of rides or use the vehicle selector to find parts that fit your machine.
Search
Current Ride
No ride selected
Recently viewed products
Your cart is empty