Which models are considered Big Twins?

Big Twins refer to larger displacement Harley-Davidsons, including Flathead, Knucklehead, Panhead, Shovelhead, Evo, and Twin Cam.

Do I need any special tools for installing custom Big Twin parts?

Basic hand tools usually suffice, but some installations (like welding) may require specialized equipment or professional assistance.

Can I return items if they don’t fit my Big Twin?

Absolutely. As long as the part is in original, unused condition, you can return it according to our standard return policy.

Harley-Davidson Big Twin Parts

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James Gaskets Fork Seal Rebuild Kit 1984-2017 Harley-Davidson FL FX
2 reviews $22.20

Colony #8879-30 Rear Fender Support Mounting Kit 1958-1980 Harley-Davidson FL/FLH - Chrome Plated
4 reviews $33.00

Standard Motorcycle Products Ignition Sensor Assembly - 1980-1994 Harley-Davidson XL 1984-1985 FXST 1980-1993 FLT
3 reviews $65.95

Drag Specialties 6-1/2 inch Forged Aluminum Handlebar Risers - Black
$135.63

Cycle Standard Handlebar Clamp - Finned - Chrome
$32.93

Cycle Standard Transmission Sprocket .75" Offset - 23 Tooth - 1991-2006 Harley-Davidson XL 1986-2006 Big Twin 5-Speed
$65.85

Cycle Standard Derby Cover - Chrome - 1970-1998 Harley-Davidson Big Twins
$32.74

Drag Specialties SAE 80W-90 High-Performance Mineral Transmission Oil for Big Twins - 1 quart
$13.08

Colony #3544-3 Oil Line Nuts 1915-1964 Harley-Davidson All Models OEM #3581-15 - CAD Plated
$14.52

Fast Eddy Co. No. 40 Crankcase Timken Race Remover / Installer
2 reviews $64.95

Cycle Standard Handlebar Clamp - Smooth - Black
$25.56

Drag Specialties Wheel Bearings and Races for Harley-Davidson OEM #9267
$42.56

James Gaskets 5 Speed Transmission End Cover Gasket 1987-2006 Harley-Davidson Big Twin
1 review $6.34

Colony #9807-10 Rear Rotor To Hub Torx Bolt Kit 1992-Up Harley-Davidson XL/FLT/Softail - Chrome Plated
2 reviews $21.12

Colony #3167-4 Shock Mount Bolt Kit 1984-99 Harley Davidson Softail — Colony #3167-4 Shock Mount Bolt Kit 1984-1999 Harley-Davidson Softail - Zinc Plated
4 reviews $25.30

Colony #8732-24 Valve Cover Screws 1-1/4 inch Long 1954-1965 Harley-Davidson Panhead With Alloy D-Rings - Chrome Plated
1 review $41.97

Colony #3270-10 Rear Rotor to Hub Screw & Nut Kit 1992-Up Harley-Davidson XL/FLT/Softail/Dyna - Zinc Plated
$13.98

Cycle Craft #175 Main Jet - 1988-2006 Keihin CV Carburetor
$5.99

Cycle Standard Handlebar Clamp - Finned - Black
$25.08

Autolite Spark Plug- 1966-1974 Shovelhead/ 1948-1968 Panhead - Manufacturer Part #4275
8 reviews $6.27

Cycle Standard Clutch Cable OEM #38606-87A 1987-1994 Harley-Davidson FXR
1 review $62.56

Forever The Chaos Life FTCL KiCK FLiP Kicker Pedal For Harley-Davidson Motorcycles
$125.00

Colony #9637-13 Transmission Kicker Cover Stud Kit 1936-1984 Harley-Davidson Big Twin - Parkerized
3 reviews $25.00

James Gaskets Exhaust Port Gasket Kit - Thin Graphite Wire Gaskets & Hex Nuts - 1984-Up Harley-Davidson Evo/Twin Cam 1986-2022 XL
1 review $24.95

Lowbrow Customs Pursuit Shifter Peg for Harleys - Raw Aluminum
28 reviews $31.03

Colony #2554-34 Machine Gun Bracket and Ammo Box Mounting Kit 1940-1942 Harley-Davidson WLA
1 review $123.97

Progressive Suspension Replacement Fork Springs 1999-05 Harley-Davidson FXD FXDL FXDC
1 review $123.95

Lowbrow Customs 39mm Fork Shrouds - Black - 1987-Up - Harley-Davidson Sportsters
53 reviews $122.76

Colony #3154-18 Footboard Mounting Kit Parkerized Harley Davidson Big Twins 1955-57 — Colony #3154-18 Footboard Mounting Kit 1955-1957 Harley-Davidson Big Twins - Parkerized
3 reviews $61.33

Cycle Standard 1/4-20 inch Fender Seat Mount Nut Kit - Zinc Plated
2 reviews $11.12

Cycle Standard S&S Super E/G Carburetor Adapter for CV Air Cleaners - Black
$30.48

Colony #2442-8 High Performance Cylinder Studs 1983-1999 Harley-Davidson Big Twin Evo
$120.18

FNA Custom Cycle Tite Seal Kit Replacement Seals
2 reviews $20.00

Marion Metalworks Super Carb Mounting Kit
$60.00

Gasbox Front Pipe Exhaust Clamp 2 Piece Set 1937-1969 Harley-Davidson EL FL - Parkerized OEM #65512-37
3 reviews $20.00

Prism Supply Co. Ratchet Top Shifter Plate - Mild Steel
$29.99

Colony #7812-12 Inner Primary Mounting Kit - 1955-1964 Harley-Davidson Panhead
$29.98

Gasbox Heavy Duty Universal 4 Speed Transmission Mounting Plate
$59.95

S&S Cycle Ignition Rotor - 1970-99 Harley-Davidson Big Twins
$19.95

Colony #7619-1 Custom Stem Nut 1971-Up Harley-Davidson 1979-Up Sportster - Chrome Plated
1 review $23.91

Colony #2094-4 Handlebar Riser Allen Bolt Kit 1/2-13 x 2-1/2" Harley-Davidson FLST Models - Chrome Plated
5 reviews $14.89

Colony #8714-20 Big Bore Headbolt & Washer Kit 1949-Up Harley-Davidson Panhead/Shovelhead - Chrome Plated
2 reviews $58.66

Lowbrow Customs Finned Master Cylinder Cover - 1982 - 2005 Harley-Davidson #45004-85
20 reviews $29.33

Lowbrow Customs Harley-Davidson 4 Speed Transmission Work Stand
23 reviews $38.98

Colony #9918-8 Rocker Arm Stud Nut Kit 1948-1965 Harley-Davidson Panhead - CAD Plated
2 reviews $19.12

Cycle Standard Mini 1:1 ratio Mechanical Speedometer - 2.4 inch
5 reviews $56.69

James Gaskets Fork Seal 49MM Rebuild Kit 2006-Up Harley-Davidson FXD/FLD
4 reviews $28.29

Colony #7119-2 Threaded Cylinder Head to Manifold Nipple With O-ring Seal - 1940-1954 Harley-Davidson OHV 74's 1953-56 K/KH
1 review $22.45

Gasbox CV Carburetor Support Bracket - 1999 - 2006 Harley-Davidson Twin Cam
8 reviews $27.99

James Gaskets Replacement Float Bowl O-ring for 1992-2006 Harley-Davidson CV Carbs
$6.96

Lowbrow Customs Fork Nut Wrench Harley-Davidson Big Twin & Sportster Fork Tube Caps
9 reviews $27.74

Colony #8005-12 Electrical Terminal Box Assembly1948-1969 Harley-Davidson Big Twins & 45's
2 reviews $55.04

Cycle Standard Exhaust Port Gasket 1984-2024 Harley-Davidson Big Twins 1986-2022 XL OEM# 65324-83 - 5 Pack
$27.50

Colony #2311-2 Pike Nut Fork Tube Cap/Plug 1978-Up Harley-Davidson FL/FXWG/Softail - Chrome Plated
$27.50

Colony #2011-8 Head Bolt Set 12 Point 1985-1991 Harley-Davidson Big Twin 1986-1992 XL - Chrome Plated
2 reviews $109.99

Colony #2096-14 Headlamp and Horn Bracket Insulator Terminal Kit 1945-1948 Harley-Davidson Big Twin 1945-1957 Servi-car
$36.54

#2233-12 Rocker Arm Shaft Washer O-Ring Kit Harley Shovelhead 66-84 — Colony #2233-12 Rocker Arm Shaft Washer O-Ring Kit 1966-1984 Harley-Davidson Shovelhead 1957-1984 XL
23 reviews $6.05

Lowbrow Customs 39mm Low Profile Fork Caps - Black Anodized Aluminum

12 $54.22

Samwel Supplies Reproduction Bearing Adjuster Nuts for Springer Forks - Parkerized
8 reviews $54.19

EBC Brakes Sintered Front Brake Pads 1984-99 H-D FLT/FLHT/FLHR/FLTR 84-99 FXST/FLST 88-06 FXSTS 97-03 FLSTS 05-07 FLSTSC 08-11 FLSTSB
$54.14 $56.31

Colony #8820-9 Transmission Side Cover Allen Screw Kit 1936-Up Harley-Davidson Big Twin 4 Speeds - Chrome Plated
$21.60

Drag Specialties AGM Maintenance Free Battery 2000-Up Harley-Davidson Softails 99-17 FXD/FXDWG/FLD
3 reviews $107.94

Gigacycle Garage Gigacycle Garage Left Side Non-Vented Gas Cap for 1992-Up Harley-Davidsons
$107.14

Cycle Standard Clutch Hub Retainer With Rollers 1941-1984 Harley-Davidson Big Twins - OEM #37567-41A
1 review $26.74

Cycle Standard Clutch Cable OEM #38602-92 Harley Dyna 1992-2005 +4 inch Extended
2 reviews $52.68

Drag Specialties 3-1/2 inch Pullback Handlebar Riser Set - Black
$108.07

Colony #9627-19 Upper & Lower Motor Mount Kit 1936-1969 Harley-Davidson Big Twin - Parkerized
3 reviews $52.45

Cycle Standard Isolator Motor Mount - Rear - 1991-1998 Harley-Davidson Dyna
$104.66

Cycle Standard Brake Clevis Pin Kit Replaces OEM# 42460-80B 1937-2024 Harley-Davidsons
$3.99

Colony #7137-22 High Crown Acorn Rocker Box Bolt Kit - 1966-1984 Harley-Davidson Shovelhead - Chrome Plated
4 reviews $51.43

Harley-Davidson Big Twin motorcycles are legendary for their raw power, distinctive style, and unmatched capacity for customization. From the Flathead and Knucklehead to the Panhead, Shovelhead, Evo, and Twin Cam, each Big Twin engine carries its...

If you’re looking to transform your ride—enhancing speed, comfort, or that unmistakable retro look—explore our Harley-Davidson Big Twin Parts collection. We have everything you need to customize your bike, whether you’re focusing on performance upgrades or eye-catching aesthetics.

Why Upgrade a Harley-Davidson Big Twin?

Boundless Customization: Big Twins allow for radical transformations—from stripped-down bobbers to vintage choppers—letting you express your unique vision.
Enhanced Performance: Boost horsepower, torque, and responsiveness with high-quality ignition kits, carburetors, and more.
Personalized Aesthetics: Whether it’s a retro-inspired racer or a comfortable tourer, your bike can reflect your style and riding needs.

Why Buy Big Twin Motorcycle Parts at Lowbrow Customs?

We curate top brands and rigorously test products for durability, fitment, and performance before shipping them out.
Variety of Choices: We offer a carefully curated selection of motorcycle parts for a wide range of Big Twin engines—from the Flathead and Knucklehead to the Panhead, Shovelhead, Evo, and Twin Cam—so you can find the perfect fit for your ride.
Expert Guidance: Need advice on installing a gas tank or swapping out your ignition? Our dedicated staff is here to help—from how-to videos to step-by-step articles.
Passion for Custom Builds: We’re not just sellers—we’re fellow riders who believe in the art of motorcycle customization. Count on our expertise to bring your dream bike to life.
Wide Selection & Fast Shipping: Our warehouse in northeast Ohio is stocked daily, ensuring you get the parts you need quickly. Plus, enjoy free economy shipping on U.S. orders over $99 and flexible return policy within 90-day & no return fee.

Our Featured Big Twin Motorcycle Parts Products

Ignition Kits & Carburetors: Gain more power and better throttle response by upgrading your ignition and carb system. A refined setup can increase speed, torque, and overall rideability.
Custom Gas Tanks: Our Big Twin gas tanks are crafted from high-grade steel, pressure-tested to prevent leaks, and available in multiple shapes and capacities. Achieve the perfect balance between form and function.
Handlebars & Controls: From vintage ape hangers to sporty drag bars, our collection of handlebars offers different heights, widths, and designs. Complete the setup with controls like grips, mirrors, and brake/clutch assemblies for a cohesive look.
Retro Accessories: Elevate your Big Twin’s retro appeal with add-ons like vintage-inspired seats, windshield options, saddle bags, or even a top-mounted box for touring. Personalizing these details completes the old-school charm.

Ready to Customize Your Harley-Davidson Big Twin?

Explore our Harley-Davidson Big Twin Parts collection today and transform your ride into the perfect blend of power, comfort, and style. If you have questions, reach out to our expert support team or dive into our installation guides for pro tips. Let’s make your dream bike a reality—shop now and gear up for the open road.

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Harley-Davidson Big Twin Parts FAQ

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