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

Cycle Standard 1/4-20 inch Fender Seat Mount Nut Kit - Zinc Plated
2 reviews $12.23

Cycle Standard Clutch Cable OEM #38606-87A 1987-1994 Harley-Davidson FXR
1 review $66.94

Colony #2428-6 Handlebar Damper Kit 1973-Up Harley-Davidson Big Twin/Sportster
12 reviews $16.70

Cycle Standard Clutch Cable OEM #38618-52 1952-1967 Harley-Davidson FL/EL +8 inch Extended
$33.39

Drag Specialties Shifter Linkage - Black - 1984-2021 Harley-Davidson FLHT/FLHR/FLHX/FLTRX/FLTRU 2000-17 FLST/FLS
$66.73

Colony #7153-20 Heat Treated Acorn Head Bolt Kit - 1948-1983 Harley-Davidson Panhead/Shovelhead - Chrome Plated
$66.63

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

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

V-Twin Manufacturing Forged Floorboard Tab Set for 1-1/8 inch Tubing
$46.11 $65.87

Koyo Bearings Neck Post Bearing & Race Set - Made in Japan
$21.95

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

Cycle Standard 8-1/2 inch Pullback Handlebar Riser Set - Chrome
1 review $131.53

Cycle Standard Clutch Friction Disc Set 1991-Up Harley-Davidson Sportster 90-97 Big Twin
2 reviews $130.92

Lowbrow Customs Finned Master Cylinder Cover - 1982 - 2005 Harley-Davidson #45004-85
20 reviews $32.26

Cannonball Cannonball 5-Speed Kicker Tool
$128.77

Cycle Standard Bendix Zenith Carburetor Rebuild Kit with Viton Needle OEM #27132-71
12 reviews $31.96

Cycle Standard Kickstand Spring 1985-2006 Harley-Davidson Softail / 1991 & Up Touring / 1991 & Up Sportster Models - Black - OEM #50005-85A
44 reviews $9.09

Cycle Standard Chrome Headlight Eyebrow Visor for Harley Sportster FX FX FXR - with Indicator Light Holes
$42.25

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

Cycle Standard 2 Position Ignition Key Switch Replaces Harley-Davidson OEM #71428-90A
21 reviews $42.02

Colony #9913-2 39mm Fork Tube Caps 1988-Up Harley-Davidson FX/XL - Chrome Plated
1 review $31.50

Colony #3449-10 Disc Rear Rotor To Hub Screw & Nut Kit 1979-1991 Harley-Davidson FX/XL 1981-1984 FL Spoke or Cast Wheel - Zinc Plated
4 reviews $15.73

Cycle Craft #180 Main Jet - 1988-2006 Keihin CV Carburetor
1 review $5.99

Colony #3667-19 Primary Cover Screw Kit 1989-2006 Harley-Davidson Softail 1991-2005 Dyna - CAD Plated
4 reviews $25.08

Cycle Standard Clutch Cable OEM #38618-52 1952-1967 Harley-Davidson FL/EL +4 inch Extended
1 review $31.28

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

Drag Specialties Derby Cover - Chrome - 1999-2018 Harley-Davidson Big Twin/Twin Cam
1 review $61.95

Colony #8100-8 Chain Adjuster & Swingarm End Cover Kit 1973-1984 Harley-Davidson FX/FL 1979-1992 XL 1981-1987 FXR - Chrome Plated
3 reviews $41.29

Drag Specialties Sintered Front Brake Pads 84-99 H-D XL 84-94 FXR 91-98 Dyna 84-99 FLT/FLHT/FLHS/FLHR/FLTR/FXST/FLST/FXWG 88-99 FXSTS
$41.18

Colony #2312-2 Pike 39mm Fork Tube Caps 1988-Up Harley-Davidson FX/XL - Chrome Plated
$30.80

Drag Specialties Vented Screw-In Gas Cap - Chrome - 1982-1996 Harley-Davidson
6 reviews $30.69

Cycle Standard Mini 1:1 ratio Mechanical Speedometer - 2.4 inch
5 reviews $60.66

Cycle Standard Foot Peg Chrome Clevis Mounts
22 reviews $30.33

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

Unity Manufacturing Linkert Intake Leak Tester - 3 Bolt
1 review $30.00

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

Martian Machine Barefoot Cast Aluminum Kicker Pedal
1 review $120.00

Unity Manufacturing Linkert Intake Leak Tester - 4 Bolt
2 reviews $30.00

Cycle Standard Shift Lever - 1974 & Up Harley-Davidson FX - Chrome - OEM #34564-74TA
5 reviews $24.00

Gasbox Y-Pipe Exhaust Pipe 1941-1957 Factory Rigid Harley-Davidson Models - Bare Steel OEM #65505-41
2 reviews $60.00

LCFabrications CV Carburetor Cap
1 review $59.99

Prism Supply Co. Blade Style Push-in Oil Plug - Polished
$59.99

Gasbox 4 Speed Transmission Mounting Plate for 1937 - 1957 Harley-Davidson Big Twins OEM #47698-36
1 review $59.95

Colony #7800-8 Acorn Bolt Transmission Mounting Plate to Frame Kit 1936-1986 Harley-Davidson Big Twins & 4 Speed - Chrome Plated
5 reviews $23.91

Colony #7344-6 Intake Manifold Conversion Nipple Kit 1940-1954 Harley-Davidson 74's
1 review $39.47

Lowbrow Customs FiltroMax Big Twin Bracket - Black
3 reviews $39.45

Colony #9213-4 Upper Inner Pushrod Covers 1979-Up Harley-Davidson Shovelhead 1984-Up Evo 1986-1990 XL
2 reviews $39.11

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

Bates Springer Riser Studs M20 x 1.5 x 1/2-13 inch thread
3 reviews $39.06

S&S Cycle Standard Band Intake Manifold - Super B/E - 1978-1984 Harley-Davidson Shovelhead
1 review $115.90 $121.95

Colony #9810-4 Smooth Rear Axle Nut & Spacer Kit 1984-1999 Harley-Davidson Softail - Chrome Plated
$57.94

Cycle Standard Shift Lever - 1997-2013 Harley-Davidson Big Twins - Chrome - OEM #33849-97
5 reviews $38.37

Cycle Standard Ignition Advance Unit - Stainless Steel - 1970-Up Harley-Davidson OEM #3251770T
1 review $57.13

Cycle Standard Throttle Idle Cable OEM #56355-96A Harley Dyna 1996-2008
1 review $38.01

Cycle Standard Harley-Davidson FX XL Style LED Turn Signal - Replaces OEM #68404-86
1 review $37.73

Cycle Standard Clutch Cable OEM #38602-92 Harley Dyna 1992-2005 +4 inch Extended
2 reviews $56.37

James Gaskets Fork Seal Rebuild Kit 1977-1983 Harley-Davidson FL FLH FLH-80 FLT-80 FLT Classic
3 reviews $22.20

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

Bad&G Customs Harley Dyna Battery Cover Bag - Bolt-On Storage for 2006 and Up Models
23 reviews $110.00

Cycle Standard Isolator Motor Mount - Rear - 1991-1998 Harley-Davidson Dyna
$109.89

Colony #3536-16 Head Bolt Set 1940-1951 Harley-Davidson WR/WLDR - CAD Plated
$109.62

Cycle Standard Exhaust Port Gasket 1984-2024 Harley-Davidson Big Twins 1986-2022 XL OEM# 17048-98 - 2 Pack
$12.10

Cycle Standard Transmission Mounting Plate 1986-1999 Harley-Davidson Softail - Chrome
$36.27

Cycle Standard Oil Temperature Dipstick OEM #62896-00 Harley-Davidson 2000 & Up Softail
19 reviews $36.14

Colony #3732-1 Upper/Lower Fork Neck Bearing Race 1936-1949 Harley-Davidson Knucklehead 1937-1948 Big Twin U Models 1948-1949 Panhead
$27.00

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

Lowbrow Customs Domed Screw-In Gas Cap for Harley-Davidson 1982-1995 / Modern Triumph Bonneville T100 / T120, Scrambler, Thruxton - Aluminum
2 reviews $53.41

Colony #9307-17 Primary Cover Screw Kit 1970-1980 Harley-Davidson Shovelhead - Chrome Plated
2 reviews $21.29

Cycle Standard Headlight Visor - 7" Headlight - Chrome - Replaces OEM #69734-05
1 review $26.55 $35.40

Colony #9818-5 Rear Disc Brake Rotor Torx Bolt Kit 1997-Up Harley-Davidson W/Cast Wheel - Chrome Plated
18 reviews $15.13

Cycle Standard Tail Light Screws for 1973-Up Harley-Davidsons - Replaces OEM #68026-73
4 reviews $21.14

Lowbrow Customs Throttle Housing 1981-1995 Harley Thread-In Dual Cable - Black - 1 Inch
8 reviews $105.15

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.