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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Cannonball Fender Insert For Use With Stealthstarter Electric Starter Kit Rigid Frame 4 Speed Harley-Davidson Big Twins
$85.00

Colony #3733-1 Steering Head Cup 1936-1947 Harley-Davidson Knucklehead 1948-1949 Panhead 1937-1938 U Models - CAD Plated
1 review $42.00

Cycle Standard Domed Slim Black Screw-In Harley Style Gas Cap 1996 & up
47 reviews $28.00

James Gaskets 4 Speed Transmission End Cover Gasket 1936-1986 Harley-Davidson Big Twin
1 review $6.46

K&N Air Filters Oil Filter - Chrome - 1991-1998 Harley-Davidson Dyna - K&N Part # KN-173C
$20.99

Cycle Standard Oil Filter for Harley-Davidson Sportster and Big Twin Models - Chrome - OEM #63782-80
4 reviews $16.79

Colony #7826-1 Motor Sprocket Nut 7/8-14 Threads 1955-1976 Harley-Davidson Big Twin
1 review $20.90

Colony #2681-4 Linkert Carburetor Idle Hole Body Plug 1933-1965 Harley-Davidson Twins
3 reviews $13.92

Cycle Standard Clutch Cable OEM #38602-92 Harley Dyna 1992-2005 - Blacked Out
$41.41 $59.15

Cycle Standard High-Flow Washable Air Filter Element for 1990-1999 Harley 80 inch Evo #29330-96
1 review $27.58

Colony #8741-19 Oil Pump Mounting Kit 1936-1967 Harley-Davidson OHV Big Twins - CAD Plated
$27.50

Colony #7354-2 Chrome Plated Oil Tank Cap & Dipstick 1 1/4-20 Thread 1936-1954 Stock Harley-Davidson Tanks - Chrome Plated
8 reviews $27.50

Cycle Standard Ignition Advance Unit Circuit Breaker Base Assembly 1970-Up Harley-Davidson OEM# 32577-70
$20.58

Cycle Standard Throttle Cable OEM #56356-92 Harley Dyna 1992-1995 - Blacked Out
2 reviews $16.45 $23.50

Cycle Standard Chrome 6V Square Coil 1948-60 Harley-Davidson Big Twins
$82.06

V-Factor Motorcycle Parts 18 Spoke Black Stainless Steel Brake Rotor - 11.5 inches - Front - Replaces Harley-Davidson OEM #44136-92/44156-00
2 reviews $81.95

Colony #8738-10 Disc Brake Rotor Bolt & Nut Kit Harley-Davidson FL/FX/XL - Chrome Plated
3 reviews $16.38

Colony #8824-8 Coil Mounting Stud Kit 1956-1982 Harley-Davidson Big Twin OEM #72341-56A - CAD Plated
$13.40

Cycle Standard Foot Peg Spring Washers - 10 Pack
$13.35

Drag Specialties Starter Brake Light and Fuel Pump Relay 1991-2007 Harley-Davidson Big Twin Models (w/diode)
1 review $16.00

Colony #3807-12 Inner Primary Cover Mounting Stud Kit 1970-1979 Harley-Davidson FL/FLH/FX
$19.80

Cycle Standard Kickstand Spring 19366 -1987 Harley-Davidson Big Twins / Pre 1984 Ironhead Sportster Models - Black - OEM #50011-30TA
7 reviews $9.90

Drag Specialties Clutch Cable OEM #38606-87A Harley-Davidson FXST 1987-1999 +6 inch Extended
$78.39

Cycle Standard Chrome Kick Return Spring - 1936 - 1984 Harley Knucklehead Panhead Shovelhead #33085-3
4 reviews $26.08

Cycle Standard Throttle Idle Cable OEM #56355-96A Harley Dyna 1996-2008 +4 inch Extended
1 review $39.03

Gasbox Wideglide Headlight Mount 1948 - 1985 Harley-Davidson FLH - Tumbled Stainless
8 reviews $25.95

Colony #8919-19 Primary Cover Chrome Allen Head Screw Kit 1989-2006 Harley-Davidson Softail 1991-2005 Dyna - Chrome Plated
2 reviews $38.59

Cannonball Kicker Clutch/Housing Puller for Cannonball StealthStarter Kick Drive Systems
$38.56

Colony #2851-1 Wheel Bearing Locknut Tool Harley-Davidson XL/FL/FLH/FX/Sidecar/Servi-car
5 reviews $38.50

Colony #9009-5 Linkert Carb Support Bracket 1941-1953 Harley-Davidson OHV OEM #27431-41 - Parkerized
$19.25

Colony #9662-1 Gas Strainer Assembly 1950-1965 Harley-Davidson Big Twins - CAD Plated
2 reviews $76.76

Colony #9660-1 Gas Strainer Assembly 1942-1949 Harley-Davidson Twins - CAD Plated
3 reviews $76.76

Colony #8220-20 Head Bolt Kit 1940-1947 Harley-Davidson Knucklehead - Chrome Plated
1 review $76.76

Cycle Standard Transmission Sprocket Spacer OEM# 33344-94
1 review $8.44

Cycle Standard Shift Lever - 1974-1984 Harley-Davidson FL 1980-1986 FXWG (With Splines) - Chrome - OEM #34606-74
$25.27

Colony #9418-19 Transmission Mounting Kit 1965-Early 1977 Harley-Davidson Big Twin - Chrome Plated
3 reviews $37.66

Cycle Standard Bungee Nuts - 3/8-16 OEM #98185-90T
10 reviews $12.55

Cycle Standard Replacement Dished Sprocket - Chrome - 49 Tooth - 1973-1985 Harley-Davidson Big Twin 1979-81 XL
$75.05

Unity Manufacturing Four Speed Transmission Mainshaft Nut Wrench Adapter
$25.00

Hawg Supply "Milled" 4-Speed Clutch Pressure Plate
$74.99

Gasbox Strong Arm Top Motor Mount - 1984-1999 Harley-Davidson Big Twin Evolution
$74.95

Colony #9692-4 Rear Axle Nut and Lock Kit - 1930-1972 Harley-Davidsons Knucklehead/Panhead/Shovelhead - Parkerized
3 reviews $24.98

Colony #8495-1 1937-1986 Harley-Davidson Big Twin Transmission & Sportster XL Motor Case Drain Plug OEM #707 - CAD Plated
3 reviews $9.35

Cycle Standard Replacement Dished Sprocket - Black - 51 Tooth - 1973-1985 Harley-Davidson Big Twin 1979-81 XL OEM #41470-73
$74.78

Cycle Standard Bayonet / Cam Harley Style Non-Vented 2" Gas Cap - Chrome
$14.93

Cycle Electric Shim Kit CE-8120 for CE-32A Alternators on Harley-Davidsons
3 reviews $24.84

Colony #2139-4 Handlebar Riser Hex Bolt Kit 1/2-13 x 3-3/4" - Chrome Plated
$14.89

PanAm Oils Inc. Oil Pressure Gauge 0-60 psi - Black
9 reviews $37.15

Colony #7112-19 Transmission Side Cover & Clutch Arm Acorn Nut Kit - 1936-1984 Harley-Davidson Big Twin 4 Speeds - Chrome Plated
3 reviews $24.71

Colony #2433-18 Sidecar Body Support Rods Repair Kit 1941-1993 Harley-Davidson
1 review $73.37

Drag Specialties Clutch Cable OEM #38599-83A Harley-Davidson FXST 1987-1999
$73.09

Cycle Standard Dragton II Air Cleaner - Chrome - Fits Bendix / Zenith, Keihin (except CV) Carbs
15 reviews $72.80

Colony #8716-1 Fork Tube Plug 1978-Up Harley-Davidson Wide Glide - Chrome Plated
$24.26

Cycle Standard Oil filter 1941-1964 Harley-Davidson Big Twins with Remote Oil Filter Unit OEM #63840-48A
7 reviews $9.09

Colony #8934-2 Rear Axle Adjuster Screws 1986-1992 Harley-Davidson FXST - Chrome Plated
1 review $18.16

James Gaskets Primary Cover Gasket 1983-1993 Harley-Davidson Softail & Dyna Models
$36.23

Cycle Standard Replacement Dished Sprocket - Black - 49 Tooth - 1973-1985 Harley-Davidson Big Twin 1979-81 XL
$71.89

Cycle Standard Speedometer Mounting Gasket for Harley-Davidson 1989-1991 Sportster XL Models and 1987 - 1994 FXR OEM #67104-83
30 reviews $17.93

Colony #3056-1 Pushrod Lifter ToolHarley-Davidson Knucklehead Panhead Shovelhead
1 review $71.50

Cycle Standard Screw-In Harley Stock Style Non-Vented Gas Cap - Left Side - 1982-1995 - Black
$23.51

Colony #2808-1 Oversized Transmission and Oil Tank Drain Plug 2000-Up Harley-Davidson Big Twins - Zinc Plated
6 reviews $8.80

Colony #8408-1 Transmission Mainshaft Locknut & Washer 1936-1991 Harley-Davidson Big Twin 4 Speed
3 reviews $17.60

Fiorucci Fabrications Harley Big Twin Rigid Oil Tank 12V Battery Box for RTX5L-BS Battery
1 review $69.95

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

Colony #9892-18 Gas Tank Mounting Kit 1937-1975 Harley-Davidson Big Twin 1972-1972 FX - CAD Plated
4 reviews $17.42

Colony #2743-2 Oversized Ignition Timer Cover Stud Kit 1980-Up Harley-Davidson Big Twin/Sportster - Zinc Plated
1 review $13.92

Colony #2487-2 Pike Nut Rear Axle Covers 1984-2007 Harley-Davidson Softail - Chrome Plated
4 reviews $69.58

Colony #3639-2 Intake Manifold Rubber Seals 1978-1984 Harley-Davidson Shovelhead & Sportster
$7.70

Colony #3239-4 Front Brake Cable Handlebar Clip 1928 - 1948 Harley-Davidson Big Twins and 1932 - 1957 45's and Servi-cars — Colony #3239-4 Front Brake Cable Handlebar Clip 1928-1948 Harley-Davidson Big Twins 1932-1957 45s/Servi-cars - Chrome Plated
$23.00

Colony #2048-4 Footpeg Mounting Low Head Allen Bolt/Nut Kit 1969-Up Harley-Davidson FL/FX/XL - Chrome Plated
2 reviews $17.22

Drag Specialties Swing Arm Bearing Kit 1984-99 Harley-Davidson FXST/FLST
$68.75

Cycle Standard Oil Filter for Harley-Davidson XL FXR Softail Touring Models and Buell - Black - OEM #63805-80A 63796-77A
9 reviews $11.33

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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