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    Bikes / Harley-Davidson / Softail Fat Boy FLSTF/I (all years)

    1990 Harley-Davidson Softail Fat Boy FLSTF/I

    539 aftermarket parts are listed for the 1990 Harley-Davidson Softail Fat Boy FLSTF/I, in 28 categories.

    Jump to a category (28)
    • Air Intake
    • Bodywork / Fairings
    • Brakes
    • Chain
    • Cosmetic / Styling
    • Crash Protection
    • Electronics
    • Engine Covers
    • Engine Rebuild Kits
    • Exhaust
    • Fender Eliminators
    • Foot Controls
    • Fuel System
    • Hand Controls
    • Handguards
    • Hardware / Fasteners
    • Kickstands / Center Stands
    • Levers
    • Lighting
    • Luggage Racks
    • Oil System
    • Performance
    • Seats
    • Sprockets
    • Suspension
    • Turn Signals
    • Wheels
    • Windscreens

    Performance

    Softail Fat Boy FLSTF/I Air Intake

    See all 10 →
    • Biker's ChoiceBiker's Choice Old Style CV Air Cleaner Cover For Harley 1990-1999
      $63.99
    • Drag SpecialtiesDrag Specialties Dragtron II Air Cleaner For Harley 1988-2017
      $148.68
    • Drag SpecialtiesDrag Specialties Premium Washable Air Filter Element For Harley
      from $46.95
    • Drag SpecialtiesDrag Specialties Premium Washable Air Filter Element For Screamin' Eagle Harley
      from $67.95

    Softail Fat Boy FLSTF/I Engine Rebuild Kits

    See all 25 →
    • All Balls RacingAll Balls Racing Inner Primary Bearing And Seal Kit For Harley Big Twin 1989-2006
      $58.18
    • CometicCometic Cam Cover Gaskets For Harley Big Twin 1970-1992
      $40.33
    • FeulingFeuling Gorilla Rocker Shaft And Bolt Kit For Harley 1984-2001
      $279.95
    • FeulingFeuling Titanium Valve Spring Retainer Kit For Harley
      $199.95

    Softail Fat Boy FLSTF/I Exhaust

    See all 26 →
    • Bassani ExhaustBassani FireSweep Exhaust For Harley Softail 1986-2017
      $769.95
    • Bassani ExhaustBassani Power Curve True Dual Crossover Head Pipes For Harley
      from $538.95
    • Bassani ExhaustBassani Radial Sweepers Exhaust With Heat Shields For Harley
      from $769.95
    • Bassani ExhaustBassani Radial Sweepers Exhaust With Heat Shields For Harley Softail / Dyna 1986-2017
      $802.95

    Softail Fat Boy FLSTF/I Fuel System

    See all 14 →
    • All Balls RacingAll Balls Racing Carburetor Repair Kit For Harley
      from $117.44
    • All Balls RacingAll Balls Racing Extended Fuel Mixture Screw For Harley CV Carb 1990-2006
      $14.00
    • Biker's ChoiceBiker's Choice Keihin Carburetor Low Speed Jet For Harley 1988-2006
      $8.60
    • Drag SpecialtiesDrag Specialties Pop-Up Low-Profile Gas Cap For Harley
      from $45.95

    Softail Fat Boy FLSTF/I Oil System

    See all 11 →
    • Drag SpecialtiesDrag Specialties Oil Plug Temp Gauge For Harley
      from $33.95
    • Drag SpecialtiesDrag Specialties Transmission Dipstick For Harley Big Twin
      $27.51
    • JimsJims Oil Pump Drive Shaft For Harley 1970-2000
      $43.05
    • JimsJims Polished Oil Pump Assembly For Harley Big Twin 1970-1991
      $808.65

    Softail Fat Boy FLSTF/I Performance

    See all 53 →
    • AndrewsAndrews EV27 Series Camshaft For Harley EVO 1984-2000
      $251.95
    • AndrewsAndrews EV51 Series Camshaft For Harley EVO 1984-2000
      $251.95
    • AndrewsAndrews EV72 Series Camshaft For Harley EVO 1984-2000
      $251.95
    • AndrewsAndrews Transmission Pulley For Harley
      from $211.95

    Protection

    Softail Fat Boy FLSTF/I Crash Protection

    See all 3 →
    • Drag SpecialtiesDrag Specialties Big Buffalo Engine Bars For Harley
      from $271.95
    • LindbyLindby Linbar Highway Bars For Harley
      $449.95
    • V-Twin Mfg.V-Twin Mfg. Engine Guard With Foot Pads For Harley
      from $105.74

    Softail Fat Boy FLSTF/I Engine Covers

    See all 16 →
    • Biker's ChoiceBiker's Choice Smooth Derby Cover For Harley Big Twin 1970-1999
      $51.99
    • James GasketJames Gasket Derby And Inspection Cover Kit For Harley 1970-1998
      $28.95
    • Joker MachineJoker Machine Finned Inspection Cover For Harley Big Twin 1970-2006
      $89.05
    • Joker MachineJoker Machine Finned Points Cover For Harley
      from $59.35

    Softail Fat Boy FLSTF/I Handguards

    See all 2 →
    • Klock WerksKlock Werks Flare Hand Guards For Harley With Cable Clutch 1982-2026
      $139.95
    • Klock WerksKlock Werks Ice Kolor Flare Hand Guards For Harley With Cable Clutch 1982-2026
      $139.95

    Appearance

    Softail Fat Boy FLSTF/I Bodywork / Fairings

    See all 7 →
    • Biker's ChoiceBiker's Choice Flatside Gas Tank For Harley Softail 1984-1999
      $264.99
    • Biker's ChoiceBiker's Choice One Piece 4.2 Gallon Stretched Tank For Harley Softail 1984-1999
      $599.99
    • Klock WerksKlock Werks Tire Hugger Fender Mounting Blocks For Harley Softail 1986-2017
      $79.95
    • Memphis ShadesMemphis Shades Bullet Fairing
      $199.95

    Softail Fat Boy FLSTF/I Cosmetic / Styling

    See all 18 →
    • Avon GripsAvon Head Bolt Cover Set For Harley 1986-2022
      $44.10
    • Cycle VisionsCycle Visions Pyramid Fender Cover For Harley 1986-2017
      $31.49
    • Drag SpecialtiesDrag Specialties Clutch Cable Adjuster Cover For Harley 1987-2022
      $37.05
    • Drag SpecialtiesDrag Specialties Swingarm Pivot Bolt Cover For Harley
      from $18.95

    Softail Fat Boy FLSTF/I Fender Eliminators

    See all 1 →
    • HogWorkzHogWorkz Laydown / Curved License Plate Mount For Harley 1973-2026
      $79.98

    Softail Fat Boy FLSTF/I Seats

    See all 23 →
    • Danny GrayDanny Gray Buttcrack Solo Seat For Harley
      from $299.95
    • Danny GrayDanny Gray Weekday 2-Up Seat For Harley
      from $399.95
    • Danny GrayDanny Gray Weekday Solo Seat For Harley Softail 1984-1999
      $299.95
    • Drag SpecialtiesDrag Specialties Backrest Compatible Predator 2-Up Seat For Harley Softail 1984-1999
      $643.95

    Softail Fat Boy FLSTF/I Windscreens

    See all 4 →
    • Biker's ChoiceBiker's Choice Fork Wind Deflector For Harley
      $175.99
    • Memphis ShadesMemphis Shades OEM Replacement Windshield For Harley FL Softail W/ King Size 1990-2017
      $219.95
    • Memphis ShadesMemphis Shades Sportshield Trigger-Lock Mount Kit For Harley
      from $159.95
    • National CycleNational Cycle Wide Frame Heavy Duty Windshield Mount Kit For Harley
      from $130.46

    Chassis

    Softail Fat Boy FLSTF/I Brakes

    See all 42 →
    • Arlen NessArlen Ness Brake Rotor Hardware Kit For Harley 1986-2026
      $26.96
    • Biker's ChoiceBiker's Choice 11.5" Brake Rotor For Harley 1984-2022
      $105.95
    • Biker's ChoiceBiker's Choice Chrome Rear Caliper For Harley Touring / Dyna / Softail 1984-1999
      $249.99
    • Biker's ChoiceBiker's Choice Rear Brake Caliper Seal Kit For Harley
      from $17.99

    Softail Fat Boy FLSTF/I Chain

    See all 3 →
    • PantherPanther Rear Drive Belt For Harley Softail 1986-1994
      $273.95
    • S&S CycleS&S Cycle Primary Chain for Harley Big Twin 1941-2006
      $125.95
    • Twin PowerTwin Power Primary Chain for Harley
      from $89.99

    Softail Fat Boy FLSTF/I Foot Controls

    See all 62 →
    • Arlen NessArlen Ness 10-Gauge Driver Floorboards For Harley
      $449.96
    • Arlen NessArlen Ness 10-Gauge Shifter Rod For Harley Touring / Softail 1984-2026
      $143.96
    • Arlen NessArlen Ness Beveled Fusion Series Driver Floorboards For Harley 1984-2025
      $404.96
    • Arlen NessArlen Ness Deep Cut Round Shifter Rod For Harley Touring / Softail 1984-2026
      $143.96

    Softail Fat Boy FLSTF/I Hand Controls

    See all 84 →
    • AccutronixAccutronix Grips For Harley
      from $126.95
    • Alloy ArtAlloy Art Gooden Tight Custom Riser Bushing Kit For Harley 1973-2017
      $60.95
    • Arlen NessArlen Ness Air Trax Grips For Harley
      from $62.96
    • Arlen NessArlen Ness Diamond Grips For Harley With Dual Cable Throttle
      $80.96

    Softail Fat Boy FLSTF/I Hardware / Fasteners

    See all 16 →
    • ColonyColony Front Axle Nut For Harley 1985-1999
      $11.95
    • ColonyColony Rear Fender Support Mount Screws For Harley 1980-2000
      $13.95
    • Eastern Motorcycle PartsEastern Motorcycle Parts Primary Drain Plug And Valve Cover Gasket For Harley 1971-2000
      $0.99
    • FeulingFeuling 12 Point External Engine Hardware Kit For Harley
      from $219.95

    Softail Fat Boy FLSTF/I Kickstands / Center Stands

    See all 4 →
    • Biker's ChoiceBiker's Choice Jiffy Stand Leg Stop For Harley 1937-2006
      $17.99
    • Drag SpecialtiesDrag Specialties Kickstand Extension For Harley
      from $23.95
    • Milwaukee TwinsMilwaukee Twins Jiffy Stand Bumper Pad For Harley 1970-1999
      $2.19
    • Milwaukee TwinsMilwaukee Twins Jiffy Stand Leg Stop For Harley 1937-2006
      $7.99

    Softail Fat Boy FLSTF/I Levers

    See all 8 →
    • Drag SpecialtiesDrag Specialties Fringed Leather Lever Covers For Harley 1984-1995
      $13.95
    • Drag SpecialtiesDrag Specialties Pivot Pin And Clip Kit For Harley 1984-2017
      $4.99
    • Drag SpecialtiesDrag Specialties Stealth Series Lever Set For Harley 1982-1995
      $32.81
    • Ken's FactoryKen's Factory Next Level Perch With Helmet Lock For Harley
      $199.95

    Softail Fat Boy FLSTF/I Luggage Racks

    See all 7 →
    • Cycle VisionsCycle Visions Bagger Tail For Harley Softail
      from $297.00
    • Drag SpecialtiesDrag Specialties Square Sissy Bar For Harley Big Twin 1984-2026
      $158.31
    • HogWorkzHogWorkz Detachable Sissy Bar With Backrest And Luggage Rack For Harley
      from $219.98
    • HogWorkzHogWorkz Docking Hardware Kit For Harley Softail 1984-2017
      $34.98

    Softail Fat Boy FLSTF/I Sprockets

    See all 2 →
    • Belt DrivesBDL Transmission Pulley For Harley Big Twin 1985-2006
      $192.95
    • Drag SpecialtiesDrag Specialties Compensator Sprocket Kit For Harley Big Twin 1984-1990
      $308.41

    Softail Fat Boy FLSTF/I Suspension

    See all 29 →
    • BikeMasterBikeMaster Fork Seals For Harley FX / FL 1984-2017
      $15.99
    • Biker's ChoiceBiker's Choice 41MM Fork Seal Kit For Harley Softail 1984-2017
      $42.99
    • Biker's ChoiceBiker's Choice Fork Bushings For Harley
      from $12.99
    • Biker's ChoiceBiker's Choice Fork Seal Kit For Harley
      from $42.99

    Softail Fat Boy FLSTF/I Wheels

    See all 5 →
    • Drag SpecialtiesDrag Specialties Chrome Front Axle Kit For Harley
      from $81.39
    • KuryakynKuryakyn Roman Front Axle Nut Covers For Harley 1984-2006
      $52.99
    • Milwaukee TwinsMilwaukee Twins Dome Front Axle Nut Covers For Harley Softail 1984-2006
      $22.99
    • Milwaukee TwinsMilwaukee Twins Front Axle & Hardware Kit For Harley 1984-1999
      $57.40

    Electronics

    Softail Fat Boy FLSTF/I Electronics

    See all 39 →
    • AccelAccel Solid State Voltage Regulator For Harley
      from $228.95
    • All Balls RacingAll Balls Racing 1.7kW Starter For Harley Big Twin 1989-2006
      $504.74
    • All Balls RacingAll Balls Racing High Performance 1.4kW Starter For Harley Big Twin 1990-2006
      $389.58
    • All Balls RacingAll Balls Starter Clutch With Bearing For Harley Big Twin 1989-1990
      $124.65

    Softail Fat Boy FLSTF/I Lighting

    See all 22 →
    • BadlandsBadlands Hardwired Load Equalizer Module For Harley 1990-2017
      $62.96
    • BadlandsBadlands Illuminator Run / Brake / Turn Signal Module For Harley
      from $112.45
    • BadlandsBadlands Illuminator Run / Brake / Turn Signal Module For Harley 1985-1996
      $120.56
    • Custom DynamicsCustom Dynamics 7" Color Changing Shark Demon Headlight For Harley
      $499.95

    Softail Fat Boy FLSTF/I Turn Signals

    See all 3 →
    • Alloy ArtAlloy Art LED Front Turn Signals For Harley Fat Boy 1990-2017
      $208.95
    • Biker's ChoiceBiker's Choice Flat Smoked Turn Signal Lens Kit For Harley 1986-2017
      $53.99
    • Milwaukee TwinsMilwaukee Twins Late Style Turn Signal Assembly For Harley 1986-1995
      $19.99

    More categories

    • Accessories
    • Axle Sliders
    • Device Mounts
    • ECU / Tuning
    • Frame Sliders
    • Integrated Tail Lights
    • Mirrors
    • Radiator Guards
    • Radiators
    • Rearsets
    • Stator Covers
    • Steering Dampers
    • Swingarm Spools
    • Tank Grips
    • Tires
    • Towing & Hitches
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