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

Sort by

FNA Custom Cycle Carb Arm Support Bracket for Harley-Davidson Ironheads and Shovelheads - Polished
$135.71

Mooneyes Finned Points Cover for Harley-Davdison 1999 & Up Twin Cam
4 reviews $67.67

Cycle Standard Headlight Visor - 5-3/4" Headlight - Black - Replaces OEM# 69735-05
$35.85

Martian Machine Sideways Can Cast Aluminum Points Cover - Horizontal
1 review $45.00

Cycle Standard Replacement Dished Sprocket - Chrome - 49 Tooth - 1973-1985 Harley-Davidson Big Twin 1979-81 XL
$66.80

James Gaskets Fork Seal Rebuild Kit 1949-1977 Harley-Davidson FL
$22.20

Drag Specialties Shifter Linkage - Chrome - 1986-2017 Harley-Davidson FLS/_FXST/_FXS/_FLST
$44.24

Cycle Electric Shim Kit CE-8120 for CE-32A Alternators on Harley-Davidsons
1 review $22.06 $23.62

Cycle Standard Handlebar Clamp - Finned - Black
$22.80

Cannonball Transmission Base Plate 1936-1985 4 Speed Harley-Davidson Big Twins
$132.13

Colony #2967-10 Grade 8 Head Bolt Kit 1977-1984 Harley-Davidson Shovelhead - Chrome Plated
1 review $65.99

Drag Specialties 6-1/2 inch Forged Aluminum Handlebar Risers - Black
$131.79

Fast Eddy Co. No. 5 Cam Gauge Pins .108" 1990-1999 Harley Big Twins
2 reviews $21.95

Gigacycle Garage Gigacycle Garage FXR Side Panel Screws & Seat Screw for Ness Style side panels
$131.43

Drag Specialties Billet Flange Carb Adapter - Mount Mikuni or CV carb to Harley-Davidson Evo Big Twin/Panhead/Shovelhead/Ironhead Models
13 reviews $43.76

Fast Eddy Co. No. 40 Crankcase Timken Race Remover / Installer
1 review $64.95

Lowbrow Customs Finish Line Shifter Peg for Harleys - Black Aluminum
4 reviews $29.31

Drag Specialties Derby Cover - Chrome - 1999-2018 Harley-Davidson Big Twin/Twin Cam
$63.81

Colony #3274-2 Dome Shaped Front Axle Covers 2001-2011 Harley-Davidson Softail Springer/Heritage Springer - Chrome Plated
2 reviews $31.63

Colony #9696-18 Saddle to Seat Tee Mounting Kit 1934-1980 Harley-Davidson All Models (Except FX/XL) - Parkerized
5 reviews $31.50

Cycle Standard Transmission Sprocket .75" Offset - 24 Tooth - 1991-2006 Harley-Davidson XL 1986-2006 Big Twin 5-Speed
$62.61

Motone Screw-In Billet Gas Cap for 1996 & later Harley-Davidson - Vented - Black
$82.47 $102.31

Cycle Standard 5-1/2 inch Forged Aluminum Handlebar Risers - Chrome
$82.46

Cycle Standard 41MM Chrome Fork Tubes 1984-1999 Harley-Davidson FXWG/D FXST - 24-1/4 inch
$162.55

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

Lowbrow Customs Cast Aluminum Knurled Oil Tank Plug - Semi Polished
2 reviews $20.87

Cycle Standard Bungee Nuts - 5/16-18
10 reviews $10.39

Cycle Standard Kickstand Spring 1985 - 2006 Harley-Davidson Softail / 1991 & Up Touring / 1991 & Up Sportster Models - Black - OEM #50005-85A
42 reviews $7.51

Hawg Supply Linkert Carburetor to S&S Manifold Adapter Plate
$60.00

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

Fast Eddy Co. No. 55 Intake Leak Tester - 2 Bolt Style
$59.95

Fast Eddy Co. No. 59 Valve Guide Drivers - 5/16 I.D. - Harley-Davidson Evo Big Twin/Twin Cam/Evo XL
$29.95

Fast Eddy Co. No. 57 Valve Guide Drivers - 3/8 I.D. - Pre-1984 Harley-Davidson Big Twin
$29.95

Prism Supply Co. Speedometer Cable Eliminator for 1936-1984 Harley-Davidson Big Twin 4 Speed
$16.99

Cycle Standard Transmission Mounting Plate 1986-1999 Harley-Davidson Softail - Chrome
$31.40

Lowbrow Customs Pursuit Shifter Peg for Harleys - Black Aluminum
44 reviews $29.62

Cycle Standard Flat Points Cover OEM# 32588-70A for Harley-Davdison 1970 & Up XL 1970 - 1999 Big Twin
3 reviews $9.88

Gasbox Exhaust Port Clamps 1950 - 1965 Harley-Davidson Panhead - Stainless Steel OEM # 65519-48 HDW
5 reviews $28.50

Cycle Standard Chrome 12V Square Coil 1948-60 Harley-Davidson Big Twins
$113.35

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

Drag Specialties Upper Fork Slider Bushings - 39mm - 0.588" - Harley-Davidson OEM# 45461-87
1 review $15.55

Fast Eddy Co. No. 37 Socket Tool for Oil Pump and Tappet Screen Plugs
6 reviews $27.95

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

Cycle Standard Handlebar Clamp - Smooth - Chrome
$22.25

Lowbrow Customs Locking Tab Washer for Harley-Davidson Rear Wheel Pulley / Sprocket - Tumbled Stainless
23 reviews $10.39

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

Prism Supply Co. Bristol Breather - Linkert Carburetor - Tumbled
$55.00

Colony #3308-6 Locking Exhaust Bolt Kit 1966-1984 Harley-Davidson Shovelhead
12 reviews $22.00

Hawg Supply Ratchet Top Shifter - Bend-Back
$109.99

Hawg Supply Ratchet Top Shifter - Straight Arm
$109.99

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

Drag Specialties Clutch Cable Harley-Davidson 4 Speed Big Twin 1968-86 - 50" Long
3 reviews $54.54

Drag Specialties Lower Fork Slider Bushings - 39mm - 0.778" - Harley-Davidson OEM# W4546587
$15.55

The Cyclery Bearing Adjuster Nut Socket for Springer Forks
$108.50

EBC Brakes Sintered Rear Brake Pads 1991-98 H-D FXD/FXDL/FXDWG 84-94 FXR L87-99 FXST/FXSTB/FXSTC/FXSTS/FLST/FLSTC/FLSTF/FLSTS
$54.14 $56.31

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

Colony #2425-2 Clutch Pushrod Adjusting Screw Locknut 1941-1984 Harley-Davidson Big Twin - Parkerized
$15.31

Cycle Standard Oil Temperature Dipstick OEM# 62635-79 Harley-Davidson 1970-84 Big Twin 1984-94 FXR 1987-92 FLT 1970-78 XL
12 reviews $31.49

Cycle Standard Mini 1:1 ratio Mechanical Speedometer - 2.4 inch
4 reviews $53.99

Colony #9629-2 Rear Chain Adjusters - 1936-1972 Harley-Davidsons Knucklehead/Panhead/Shovelhead - Parkerized
4 reviews $15.29

Drag Specialties Wheel Bearings and Races for Harley-Davidson - OEM #9267 Replacement
$35.31

Cycle Standard Direct OEM Replacement Chrome Oil Tank for 1965-1982 Harley-Davidson 4 Speed Models
2 reviews $152.51

Cycle Standard Bayonet / Cam Harley Style Non-Vented 2" Gas Cap - Chrome
$12.34

Lowbrow Customs Finned Master Cylinder Cover - 1982 - 2005 Harley-Davidson #45004-85
18 reviews $27.93

Drag Specialties 3-1/2 inch Pullback Handlebar Riser Set - Black
$105.01

Colony #3634-2 Reproduction Footrests 1952-1990 Harley-Davidson K/KH/XL 1971-1991 FX
$35.00

Unity Manufacturing Hydraulic Pushrod Wrench Set
2 reviews $35.00

Colony #8104-16 Cylinder Base Nuts 1930-1978 Harley-Davidson Big Twins - Chrome Plated
$20.99

Fast Eddy Co. No. 7 Connecting Rod Alignment Tool 1936-99 Harley Big Twins & All Sportsters
1 review $34.95

Drag Specialties Single Gauge Bracket - Black - 1995-2011 Harley-Davidson XL883 1995-2005 FXD Models
1 review $103.98

Colony #8224-8 Rocker Shaft End Plug & Cap Kit 1971-Up Harley-Davidson Shovelhead 1971-1985 XL - Chrome Plated
9 reviews $40.61

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.

Read less

Harley-Davidson Big Twin Parts FAQ

STAY CONNECTED
WITH LOWBROW

NO SPAM, EVER. JUST GREAT STUFF. YOUR INFO IS NEVER SHARED.