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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V-Factor Motorcycle Parts 18 Spoke Stainless Steel Brake Rotor - 11.5 inches - Front - Replaces Harley-Davidson OEM #44136-92/44156-00
1 review $65.40

Colony #2513-3 Clutch Drive Hub Stud Nut Kit 1947-1984 Harley-Davidson Big Twin 1947-1973 45's - Parkerized
7 reviews $7.26

Colony #8600-8 Hi-Torque Cylinder Base Nut Set Harley-Davidson Big Twin Pre-Evo - Chrome Plated
2 reviews $32.60

Gasbox Front Exhaust Pipe 1966-1969 Harley-Davidson Shovelhead - Bare Steel - OEM #65443-66
1 review $65.00

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

Cycle Standard Screw-In Harley Stock Style Vented Gas Cap - 1982-1995 - Black
$21.37

Colony #7714-20 Head Bolt Set CAD Plated 1940-1947 Harley-Davidson Knucklehead Engines - CAD Plated
$64.09

Colony #8831-10 Disc Brake Rotor to Hub Screw & Nut Kit 1978-1983 Harley-Davidson FXWG - Chrome Plated
1 review $16.01

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

Colony #3332-1 Stem Crown Nut 1936-1938 Harley-Davidson Big Twin Springer - Chrome Plated
$63.80

Colony #8857-8 Cylinder Base Stud Set 1978-1984 Harley-Davidson Big Twins OEM #16837-78
1 review $31.87

Colony #7603-4 Lower Motor Mount Kit Acorn Nut 1936-1984 Harley-Davidson OHV Big Twins - Chrome Plated
6 reviews $31.87

Colony #8142-34 Motor Case Kit Acorn Head 1979-1995 Harley-Davidson Shovelhead/Evo - Chrome Plated
$63.61

Dandlebars Feeler Gauges for 1930-1984 Harley-Davidsons
2 reviews $31.66

Colony #2488-1 Wheel Lug Wrench - 1936-1972 Harley-Davidson Knucklehead/Panhead/Shovelhead
1 review $63.25

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

Gasbox Axle Plate Threaded Bungs for 1936 - 1957 Harley-Davidson Big Twin Rigid Frames
2 reviews $20.99

Colony #8105-16 Cylinder Base Nuts & Lock Washers 1930-1978 Harley-Davidson Big Twins - CAD Plated
2 reviews $15.64

Colony #2962-6 Flat Top Brass Grease Fitting Alemite Pre-1938 Harley-Davidson - 3 Pack
$20.85

Colony #8931-16 Rocker Cover Allen Head Screw Kit 1985-Up Harley-Davidson FL/FX 1986-Up XL - Chrome Plated
3 reviews $20.85

Colony #8916-17-P Primary Cover Smooth Allen Screw Kit 1985-Up Harley-Davidson FXR 1985-1999 FLT 5 speed - Chrome Plated
1 review $31.13

Colony #2141-2 Swingarm Covers 1986-1999 Harley-Davidson Softail - Plated
4 reviews $31.13

Drag Specialties Starter Brake Light and Fuel Pump Relay 1991-2007 Harley-Davidson Big Twin Models (w/diode)
1 review $15.55

Colony #8927-3 Gas Strainer Screen 1932-1964 Harley-Davidson Big Twins/45s OEM #62265-32
2 reviews $20.70

Colony #3050-2 Stem Nut Lockwasher Kit 1960-Up Harley-Davidson FL/FLH W/O Steering Damper
$15.52

Colony #9401-1 Aluminum Transmission Filler Plug 1958-1980 Harley-Davidson Big Twin
2 reviews $15.52

Colony #8605-16 Lifter Base Screw Kit Hex Head 1954-1974 Harley-Davidson Big Twin - CAD Plated
$20.57

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

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

Colony #3469-1 Rear Chain Oiler Tee Fitting 1970-1978 Harley-Davidson FL/FLH/FX - Zinc Plated
$30.80

Colony #2771-4 Kick Starter Pedal Mounting Kit 1917-Up Harley-Davidson Davidson - Chrome Plated
2 reviews $15.40

Colony #7158-2 Linkert Carburetor Fitting For 1/4 inch ID Hose
2 reviews $8.78

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

Colony #9809-4 Ribbed Rear Axle Nut & Spacer Kit 1984-1999 Harley-Davidson Softail - Chrome Plated
1 review $60.83

Colony #7349-3 Rocker Box Oil Line Fittings 1942-1947 Harley-Davidson Knucklehead - Chrome Plated
1 review $20.27

Colony #3562-1 Stem Crown Nut /Dust Shield 1939-1948 Harley-Davidson Big Twin Springer
$60.50

Colony #3366-4 Brass Exhaust Port Nuts Harley-Davidson 1986-Up XL 1984-1999 Big Twins 1999-Up Twin Cam
6 reviews $12.10

Lowbrow Customs Slick Bungee Nuts - 3/8"-16
2 reviews $15.09

Drag Specialties Inner Primary Mainshaft Bearing Seal Kit 1989-99 Harley-Davidson Big Twin 99-06 Twin Cam
1 review $60.08

Colony #3659-1 Linkert Main Nozzle 1940-1951 Harle-Davidson OHV
$30.00

Gasbox Front Motor Mount Spacer Plate Harley-Davidson Knucklehead Panhead UL OEM #438-48 24795-48
5 reviews $15.00

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

Gasbox 4 Speed Transmission Mounting Plate for 1958 - 1964 Harley-Davidson Big Twins OEM #47698-58
$59.95

Gasbox Y-Pipe Exhaust Pipe 1941-1957 Factory Rigid Harley-Davidson Models - Bare Steel OEM #65505-41
2 reviews $59.95

Gasbox Side Mount Headlight Bracket Set for Harley 39mm Narrow Glide Front Forks
5 reviews $29.95

Drag Specialties Vented Screw-In Gas Cap - Chrome - 1982-1996 Harley-Davidson
6 reviews $29.82

Colony #9685-12 Floorboard Hinge Bolt Kit 1941-1984 Harley-Davidson All Models - Parkerized
5 reviews $14.89

Colony #3567-1 Front Wheel Hub Plate 1991-1999 Harley-Davidson XL 1984-1999 FXR/FXD - Silver
3 reviews $19.80

Colony #8474-8 Cylinder Base High Crown Cap Nut Set 1978-1984 Harley-Davidson Shovelhead - Chrome Plated
$29.34

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

Colony #3138-4 Rocker Arm Oil Line Fitting Kit 1957-84 Harley Davidson — Colony #3138-4 Rocker Arm Oil Line Fitting Kit 1966-1984 Harley-Davidson FL/FX 1957-1984 XL - Parkerized
1 review $19.36

Colony #2815-2 Spring Retainer and Acorn Nut Set 1939-1948 Harley-Davidson Big Twin Springers 1936-1952 45s 1953-1954 Servi-car - Parkerized
$19.36

Colony #7517-8 Knucklehead Rocker Arm Cover Nut Strip & Screw Plate Kit 1936-1947 Harley-Davidson Knucklehead
1 review $57.94

Lowbrow Customs Distributor Circuit Breaker Wrench for Harley-Davidson Big Twin Knucklehead Panhead #94501-56
8 reviews $19.17

Colony #8706-6 Tappet Oil Screen/Oil Pump Check Valve/Relief Valve Plug Set 1970-1980 Harley-Davidson Big Twin - Chrome Plated
1 review $28.60

Lowbrow Customs Harley-Davidson Shovelhead Tune & Service Video Workshop Manual DVD with Frank Kaisler
42 reviews $5.19 $10.19

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

Colony #9891-18 Gas Tank Mounting Kit 1937-1975 Harley-Davidson Big Twin 1972-1972 FX - Chrome Plated
3 reviews $18.88

Cycle Standard Shift Lever Bracket 1970-1984 Harley-Davidson FL Models - OEM #33630-70
$56.57

Gasbox S&S Carburetor Support Bracket - 1999 - 2006 Harley-Davidson Twin Cam
6 reviews $27.99

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

Colony #9720-1 Stem Nut 1936-1948 Harley-Davidson Big Twin Springers - Parkerized
3 reviews $13.94

Colony #8623-2 Seat Clevis Pin & Spring 1929-Up Harley-Davidson
5 reviews $13.94

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

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

Colony #2538-2 Ignition Timer Cover Stud Kit 1972-1979 Harley-Davidson Big Twin - Zinc Plated
1 review $13.92

Lowbrow Customs Rocker Box Oil Pressure Gauge Adapter Fitting - Chrome - 1966 - 1970 Harley-Davidson Shovelhead, 1957 - 1970 Sportster
2 reviews $27.74

James Gaskets Primary Cover & Inspection Cover Gasket Kit 1984-1986 Harley-Davidson FL/FLH/FX/FXE/FXWG 1984-1988 Softail
$55.23

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

Colony #2916-2 Starter Shaft Nut and Spacer Kit 1965-1969 Harley-Davidson FL
1 review $27.50

Colony #7506-4 Aluminum Alloy Tubular Pushrods 1948-1952 Harley-Davidson Panhead using 1966-Up Shovel Top End
1 review $55.00

Colony #3451-4 Lower Shock Mounting Kit 1973-1984 Harley-Davidson FLH 1973-1986 FX - Zinc Plated
$9.08

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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