1990 Harley-Davidson FLSTF Fat Boy Tune-Up Parts
42 parts verified to fit your 1990 Harley-Davidson FLSTF Fat Boy for a complete tune-up. This is an easy DIY project — estimated 1-2 hours.
Air Filters
(1)primary
Fuel Injectors
(8)companion
Bikers Choice
Bikers Choice 84-99 Softail 1 Piece stretched 4.2 Gallon Fuel Tank Custom
$614.39
Bikers Choice
Bikers Choice 84-99 Softail 3.5 Gallon Flatside Gas Tanks Replaces H-D 61426-85 Pr
$271.35
Bikers Choice
Bikers Choice 84-99 Softail 5 Gallon Flatside Gas Tanks Replaces H-D 61426-85 Pr
$307.19
Bikers Choice
Bikers Choice 84-99 Softail 6 Gallon Flatside Tank Pr
$358.39
Bikers Choice
Bikers Choice 84-99 Softail Flatside Gas Tank Mounting Kit
$129.01
Bikers Choice
Bikers Choice 82-Up Chrome Pointed Gas Cap Set With Paint Savers
$184.31
Bikers Choice
Bikers Choice 82-Up Chrome Slim Gas Cap Set Screw In
$204.79
Bikers Choice
Bikers Choice 84-99 Softail 80-86 FXWG Chrome Tank Panel
$80.88
Fluids & Additives
(8)consumable
K&N
K&N Harley-Davidson 3in OD x 4.063in H Chrome Oil Filter
$19.99
K&N
K&N Harley-Davidson 3in OD x 4.063in H Oil Filter
$17.99
LIQUI MOLY
LIQUI MOLY 1L Motorbike 4T SAE 10W40
$57.15
LIQUI MOLY
LIQUI MOLY 1L Motorbike 4T SAE 10W40 Offroad
$65.55
LIQUI MOLY
LIQUI MOLY 1L Motorbike 4T SAE 10W40 Street
$69.31
LIQUI MOLY
LIQUI MOLY 1L Motorbike 4T SAE 20W50 Street
$63.23
LIQUI MOLY
LIQUI MOLY 1L Motorbike 4T Synth SAE 10W60 Street Race
$96.35
LIQUI MOLY
LIQUI MOLY 1L Motorbike Fork Oil SAE 15W Heavy
$98.87
Tune-Up for Other Harley-Davidson FLSTF Fat Boy Years
Other Jobs for Your 1990 Harley-Davidson FLSTF Fat Boy
Frequently Asked Questions
What parts do I need for a tune-up on my 1990 Harley-Davidson FLSTF Fat Boy?
A complete tune-up on the 1990 Harley-Davidson FLSTF Fat Boy typically requires air filters, fuel injectors, fluids & additives. All parts shown on this page are verified to fit your specific vehicle.
How long does a tune-up take on a 1990 Harley-Davidson FLSTF Fat Boy?
A tune-up typically takes 1-2 hours and is rated as easy difficulty. Actual time may vary depending on your experience and the specific parts being replaced.
Can I do a tune-up myself?
Yes! A tune-up is an easy DIY project that most people can do with basic hand tools. It's a great way to save money on labor costs.
Are these parts guaranteed to fit my 1990 Harley-Davidson FLSTF Fat Boy?
Yes, all parts on this page are verified to fit the 1990 Harley-Davidson FLSTF Fat Boy using VCDB fitment data from manufacturers. Our fitment information is cross-referenced with industry-standard vehicle databases to ensure accuracy.
What brands make tune-up parts for the 1990 Harley-Davidson FLSTF Fat Boy?
We carry tune-up parts from trusted brands including K&N, Bikers Choice, and LIQUI MOLY. Filter by brand to find your preferred manufacturer.
How much does a tune-up cost for a 1990 Harley-Davidson FLSTF Fat Boy?
The cost of a tune-up for the 1990 Harley-Davidson FLSTF Fat Boy depends on the parts and brands you choose. Browse the parts on this page to see current pricing. Doing the work yourself saves significantly on labor costs.