1990 Harley-Davidson FLHS Electra Glide Sport Parts & Accessories
Touring
Evolution Era (1984-1998)
270 parts available
73 Performance
48 Maintenance
149 Accessories
1990 Harley-Davidson FLHS Electra Glide Sport
About the 1990 Harley-Davidson FLHS Electra Glide Sport
The 1990 FLHS Electra Glide Sport is a 'semi-dressed' touring motorcycle that serves as the direct stylistic and functional predecessor to the Road King. It features the reliable 1340cc Evolution V-twin engine and is distinguished by its lack of a batwing fairing, using a large detachable windshield and a chrome headlight nacelle instead. For the 1990 model year, Harley-Davidson introduced key updates including an improved starter motor and the relocation of the battery from the saddlebags to under the seat.
What Makes This Trim Special
- Windshield and Nacelle — Features a large clear detachable windshield and a chrome headlight nacelle instead of the 'Batwing' fairing found on the FLHTC.
- Instrumentation — Minimalist gauge cluster mounted on the headlight nacelle/handlebar area rather than integrated into a fairing.
- Battery Location — 1990 specific change: Battery moved to under the seat, freeing up space in the saddlebags.
- Luggage System — Equipped with hard, lockable side panniers and a rear luggage rack, but typically lacked the 'Tour-Pak' top box found on Ultra models.
Key Specifications
| Engine |
Evolution V-Twin, 45-degree, OHV Bore x Stroke: 3.5 x 4.25 inches (88.8 x 108 mm) |
| Displacement | 1340cc (81.6 cu in) |
| Fuel System | 38mm Keihin constant velocity carburetor |
| Cooling | Air-cooled |
| Transmission | 5-speed manual |
| Drivetrain | Belt final drive |
| Front Suspension |
Telescopic forks with air-assist 41mm fork tubes |
| Rear Suspension |
Dual air-adjustable shocks Air-adjustable for load leveling |
| Front Brakes | Dual 292mm discs with 4-piston calipers |
| Rear Brakes | Single 292mm disc with 4-piston caliper |
| Front Tire | MT90-16 |
| Rear Tire | MT90-16 |
| Weight | 756 lbs (wet) |
| Seat Height | 27.5 inches |
| Fuel Capacity | 5.02 gallons |
Ownership at a Glance
What to know about maintaining a 1990 Harley-Davidson FLHS Electra Glide Sport
Maintenance
Wear Items
- Cylinder Base Gaskets
- Hydraulic Lifters
- Drive Belt
Upgrades
- Camshaft
- Ignition Module
- Saddlebag Retrofits
Replacements
Known Issues 3
Top reported problems from owners and mechanics
High
Lifter/Tappet Failure
The needle bearings in the lifter rollers can fail, potentially dropping metal into the engine.
Medium
Cylinder Base Gasket Leaks
Oil seepage at the cylinder-to-case mating surface.
Medium
Charging System Failure
Stators often short out or the voltage regulator fails, leading to a dead battery.
Parts Most Owners Need
Performance Upgrades 73
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Baker Drivetrain
Baker Drivetrain High Torque Bearing/Seal Kit
$40.95 - $139.95
2 of 2 options fit
In Stock
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Maintenance Parts 48
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EASTERN MOTORCYCLE PARTS
Clutch Pushrod Kits and Components for Big Twin Models
$36.95
2 of 6 options fit
In Stock
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Drag Specialties
Drag Specialties 530 Chain Conversion Rear Sprockets
$93.95 - $111.95
8 of 17 options fit
In Stock
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Accessories 149
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Alloy Art
Alloy Art Gooden-Tite ISO Front Motor Mounts
$182.95 - $202.95
2 of 2 options fit
In Stock
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Arlen Ness
Arlen Ness Adjustable Driver and Passenger Floorboards
$624.95 - $889.95
2 of 6 options fit
In Stock
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Arlen Ness
Arlen Ness MX Driver and Passenger Floorboards
$724.95 - $1,144.95
2 of 9 options fit
In Stock
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Frequently Asked Questions About the 1990 Harley-Davidson FLHS Electra Glide Sport
No, the 1990 FLHS uses a Keihin 38mm constant velocity (CV) carburetor. Fuel injection was not introduced to the Electra Glide line until 1995.
No, the FLHS did not come with a factory reverse gear. Reverse was only available as an aftermarket add-on or on specific sidecar-equipped models from earlier decades.
The FLHS is the predecessor to the Road King (FLHR). While they share the 'no-fairing' look, the Road King (introduced in 1994) featured a cleaner dash, different tank console, and updated frame/engine mounting.
It typically takes 3 to 4 quarts of 20W-50 oil, depending on whether the filter is changed and how much is drained from the dry-sump system.
It uses a Y50-N18L-A (or equivalent like YTX24HL-BS) battery. Note that 1990 was the first year the battery was moved under the seat.
Yes, because the FLHS shares the same frame and forks as the Electra Glide Classic, a Batwing fairing can be mounted, though it requires the appropriate brackets and wiring for gauges.
While capable of reaching approximately 95-100 mph, it is most comfortable cruising at 65-75 mph due to its gearing and air-cooled nature.
This is often caused by worn swingarm bushings (Cleve-Blocs) or misaligned engine mounts. Upgrading to spherical bearings or a stabilizer kit is a common solution.
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