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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Colony #3597-1 Spark Control Cable Clamp 1949-1964 Harley-Davidson Big Twins
$7.26

Colony #3326-2 Oil Pump Cover to Oil Filter Line Fitting 1950-1957 Harley-Davidson Big Twin - CAD Plated
1 review $7.26

Colony #2586-1 Timer Cable Clamp 1949-1964 Harley-Davidson Big Twin - CAD Plated
1 review $7.26

Colony #8152-2 Generator Screw Kit 1936-1957 Harley-Davidson Big Twin - CAD Plated
3 reviews $7.17

Colony #2496-2 Tappet Oil Screen and Spring 1966-1969 Harley-Davidson Shovelhead
$6.96

Colony #9966-4 Footpeg Mounting Bolt/Nut Kit 1969-Up Harley-Davidson FX/FL/XL - Zinc Plated
$6.78

Colony #9016-3 Dash Mounting Kit Button Allen Head 1986-Up Harley-Davidson FXR (Except 88-Up FXRS) - Chrome Plated
$6.78

Colony #8495-1 1937-1986 Harley-Davidson Big Twin Transmission & Sportster XL Motor Case Drain Plug OEM# 707 - CAD Plated
3 reviews $6.78

Colony #3329-4 Exhaust Port Nuts 1984-1999 Harley-Davidson Big Twin 1986-Up XL 1999-Up Twin Cam - Chrome Plated
$6.49

Colony #3044-7 Foot Brake Lever and Bracket Mounting Kit 1936-1971 Harley-Davidson Big Twin - Parkerized
$6.38

Colony #9734-7 Foot Brake Lever & Bracket Mounting Kit 1936-1971 Harley-Davidson Big Twin - Parkerized
1 review $6.38

Colony #9733-7 Foot Brake Lever & Bracket Mounting Kit CAD Harley-Davidson 1936-71 - CAD Plated
2 reviews $6.38

Cycle Standard Kickstand Bumper Rubber - 1985-2000 Harley-Davidson Touring Models OEM # 50059-85A
1 review $6.30

Colony #2643-2 Low Speed Needle Valve Lever Spring Collar 1927-1965 Linkert Carburetor
1 review $6.05

Cycle Craft #160 Main Jet - 1988-2006 Keihin CV Carburetor
$5.99

Cycle Craft #40 Pilot Jet - 1988-2006 Keihin CV Carburetor
$5.99

Colony #9931-8 Intake Manifold to Cylinder Head Allen Kit 1990-1994 Harley-Davidson Big Twin/XL
$5.96

James Gaskets Bearing Housing/Case Gasket - Silicone - 1984-1998 Harley-Davidson Big Twin 5-Speed
$5.61

Colony #9631-1 Oil Pump Stud Nut Short 1941-1948 Harley-Davidson 74/80 SV 1941-1954 45's - Parkerized
$5.58

Colony #9932-8 Intake Manifold to Cylinder Head Allen Kit 1995-Up Harley-Davidson Big Twins/XL
1 review $5.58

Colony #3706-5 Dash Cover Mounting Kit 1936-1946 Harley-Davidson Twins - Chrome Plated
$5.50

Colony #9675-1 Motor Case Drain Plug 1911-1970 Harley-Davidson 1968-1984 Oil Pump Body - Parkerized
1 review $5.50

Colony #3064-2 Parkerized Fender Brace Bolt Kit 1941-57 Harley Davidson Big Twin and 45 — Colony #3064-2 Fender Brace Bolt Kit 1941-1957 Harley-Davidson Big Twin/45's - Parkerized
$5.45

Cycle Standard Kickstand Bumper Rubber - 1986-2000 Harley-Davidson Sportster 1989-06 Softail OEM # 62123-66
$5.08

Colony #9910-4 Fork Slider Drain Screws 1973-Up Harley-Davidson XL/FXR - Chrome Plated
3 reviews $4.84

Colony #9716-8 Cylinder Base Nut Lockwashers 1930-1977 Harley-Davidson Big Twin - Parkerized
$4.76

Colony #9916-2 Custom Air Cleaner Cover Countersunk Mounting Kit 1983-Up Harley-Davidson Big Twins - Chrome Plated
$4.76

Colony #9731-3 Gas Strainer Rebuild Kit 1939-1941 Harley-Davidson Twins
$4.76

Colony #2007-6 Air Cleaner Mounting Allen Screw Kit 1978-1983 Harley-Davidson Big Twin - Chrome Plated
$4.09

Colony #2629-4 Speedometer Mounting Kit 1936-Up Harley-Davidson Stewart-Warner Speedometers - CAD Plated
1 review $3.63

James Gaskets Generator Mounting Gasket 1940-1957 Harley-Davidson Big Twin
$0.81

Lowbrow Customs Belt To Chain Conversion Kit 1984-1994 Harley-Davidson Softail - Black Sprocket
$179.99

Lowbrow Customs Belt To Chain Conversion Kit 1984-1994 Harley-Davidson Softail - Chrome Sprocket
$179.99

Cycle Electric Rectifying Regulator CE-445 - 1995-1996 Harley-Davidson FLHYCUI/FLHTCI/FLCUI
$251.38

Cycle Electric CE-546 Replacement Regulator for Harley-Davidson Model 61 6 Volt Generators
$186.19 $199.31

Cycle Electric CE-506 Replacement Regulator for DGV-5006 Generator
$200.46 $214.59

Cycle Electric CE-102L Replacement Regulator 1936-1964 Harley-Davidson 12 Volt Conversion w/Battery in Oil Tank
$139.23 $149.03

Cycle Electric Generator DGV-5006 6 Volt for 1936-1964 Harley-Davidsons with 5/16-24 mounting bolts
$537.59 $575.46

Cycle Electric Generator DGV-2578 6 Volt for 1958-1964 Harley-Davidsons with 5/16-24 mounting bolts
$400.50 $428.72

Unity Manufacturing Clutch Lockup Tool - 1985-1989 Harley-Davidson Big Twin
$50.00

James Gaskets Primary Cover & Inspection Cover Gasket Kit 8-Hole Primary Cover 1965-1969 Harley-Davidson Big Twins
$68.87

James Gaskets Primary Cover & Inspection Cover Gasket Kit With Seals 1984-1986 Harley-Davidson FL/FLH/FX/FXE/FXWG 1984-1988 Softail
$68.87

Cycle Standard Exhaust Port Gasket 1984-2024 Harley-Davidson Big Twins 1986-2022 XL OEM# 65324-83 - 5 Pack
$25.00

Cycle Standard Exhaust Port Gasket 1984-2024 Harley-Davidson Big Twins 1986-2022 XL OEM# 17048-98 - 2 Pack
$10.00

Drag Specialties Forward Control Kit With Pegs 1982-1994 & 1999-2000 Harley-Davidson FXR Models
$407.83

Cycle Standard Replacement Dished Sprocket - Black - 49 Tooth - 1973-1985 Harley-Davidson Big Twin 1979-81 XL
$63.99

Cycle Standard Replacement Dished Sprocket - Black - 47 Tooth - 1973-1985 Harley-Davidson Big Twin 1979-81 XL
$63.99

Cycle Standard Screw-In Harley Stock Style Vented Gas Cap - 1982-1995 - Black
$19.43

Cycle Standard Screw-In Harley Stock Style Non-Vented Gas Cap - Left Side - 1982-1995 - Chrome
$24.32

Cycle Standard Screw-In Harley Stock Style Vented Gas Cap - 1982-1995 - Chrome
$24.32

Cycle Standard Transmission Sprocket Spacer OEM# 33344-94
$6.97

Hugh's Handbuilt HHB Harley Davidson Sprocket Lock System - Raw Silver (Tumbled Finish)
$69.89

Cannonball Cannonball 5-Speed Kicker Tool
$128.77

Drag Specialties Chrome Rocker Box Cover 1992-1999 Harley-Davidson EVO Big Twins
$354.27

Drag Specialties Chrome Transmission Top Cover 1987-1999 Harley-Davidson EVO Big Twins w/ 5-Speed Transmission
$89.56

Prism Supply Co. Ratchet Top Shifter Plate - Stainless Steel
$34.99

Cycle Standard 12" Black Shocks With Black Spring - Stock Length - 1973-1984 Harley-Davidson FX/FXE 1972-1984 FL
$227.10

Cycle Standard 12" Chrome Shocks With Chrome Spring - Stock Length - 1973-1984 Harley-Davidson FX/FXE 1972-1984 FL
$227.10

Cycle Standard 11" Black Shocks With Black Spring - 1 inch Under - 1973-1984 Harley-Davidson FX/FXE 1972-1984 FL
$227.10

Drag Specialties Steel Clutch Plate Set L1984-1989 Harley-Davidson Big Twins
$36.00

Drag Specialties Aramid Fiber Clutch Plate Set L1984-1989 Harley-Davidson Big Twins
$83.38

Drag Specialties Fat Bob Flatside Style Gas Tanks - 1984-1999 Harley-Davidson FXST/FLST 1985-1986 FX/FXWG - 3.5 Gallon
$348.09

Drag Specialties 41mm Lower Fork Slider Bushing 1984-2010 Harley-Davidson FXST/C 1993-2005 FXDWG 86-17 FLST 84-13 FLHT 11-13 FXS OEM# 45866-84
$15.55

Drag Specialties 41mm Upper Fork Slider Bushing 1984-2010 Harley-Davidson FXST/C 1993-2005 FXDWG 86-17 FLST 84-13 FLHT 11-13 FXS OEM# 45940-84
$15.55

Colony #3796-2 Over Length Manifold Nipple for 61" Narrow Manifiolds On 1940-1954 Harley-Davidson OHV 74"
$22.45

Colony #3736-2 Air Cleaner Cover Mounting Screw Kit 1983-Up Harley-Davidson Big Twins - Chrome
$16.50

Colony #3794-2 Tail Lamp Speed Nut & Screw Kit 1955-1972 Harley-Davidson FL/FLH/FX/XL
$15.95

Colony #3795-2 Cam Shaft Lever Screw & Nut Kit 1934-1936 Harley-Davidson RL/VL/Servi-car
$15.40

Colony #3737-2 Air Cleaner Cover Mounting Screw Kit 1983-Up Harley-Davidson Big Twins - Zinc Plated
$13.20

Colony #3802-5 Stoplight Switch Gasket 1939-1957 Harley-Davidson - 5 Pack
$12.38

Colony #3797-4 Exhaust/Saddlebag Spacers 1954-1957 Harley-Davidson - 4 Pack - CAD Plated
$10.89

Hawg Supply Quick-Pull Clutch Cable Bracket V2.0 For Harley-Davidson Ratchet Top 4 Speed Transmissions
$89.99

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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