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 #3642-2 Buddy Seat Auxiliary Spring Clip - Heavy - 1936-1964 Harley-Davidson Big Twins - Parkerized
$30.00

Colony #2625-30 Rear Fender Support Mounting Kit 1958-1980 Harley-Davidson FL/FLH - CAD Plated
5 reviews $30.00

Colony #8756-30 Primary Cover Allen Screw Kit 1936-1984 Harley-Davidson Big Twin - Chrome Plated
$30.00

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

Cycle Craft #42 Pilot Jet - 1988-2006 Keihin CV Carburetor
3 reviews $5.99

Gasbox Side Mount Headlight Bracket Set for Harley 35mm Narrow Glide Front Forks
1 review $29.95

Colony #9946-20 Cam Cover Mounting Allen Kit 1999-Up Twin Cam Dyna/FLT 2000-Up Softail - Chrome Plated
1 review $14.89

Colony #2137-4 Handlebar Riser Hex Bolt Kit 1/2-13 x 3" - Chrome Plated
5 reviews $14.89

Colony #2136-4 Handlebar Riser Hex Bolt Kit 1/2-13 x 2-3/4" - Chrome Plated
1 review $14.89

Colony #2133-4 Handlebar Riser Allen Bolt Kit 1/2-20 x 2-3/4" - Chrome Plated
1 review $14.89

Colony #9617-18 Jiffy Stand & Foot Clutch Lever Bracket Mounting Kit 1936-1978 Harley-Davidson Big Twin - Chrome Plated
$29.78

Colony #8837-10 Sprocket Nut & Bolt Kit Cap Head 1973-Up Harley-Davidson Big Twin/XL - Spoked Wheel - Chrome Plated
$29.70

Colony #3534-22 Rear Fender Rail Screw & Acorn Nut Kit 1980-1986 Harley-Davidson FXWG - Chrome Plated
$29.70

Colony #2680-4 Handlebar Riser Mounting Kit 1949-1959 Harley-Davidson Big Twins - CAD Plated
$29.70

Colony #2128-5 Gas Tank Acorn Nut Mounting Kit 1984-1999 Harley-Davidson Softail - Chrome Plated
$14.83

Drag Specialties Shifter Linkage - Chrome - 1982-94 99-00 Harley-Davidson FXR
$29.63

Cycle Standard 10 Hole Clutch Pressure Plate 1941-1984 Harley-Davidson Big Twins
1 review $14.78

Cycle Standard Steel Clutch Plate Set 1991-Up Harley-Davidson Sportster 90-97 Big Twin
$29.49

Colony #8163-3 Front Axle Nut Kit 1946-1971 Harley-Davidson Big Twins - CAD Plated
$14.74

Colony #8112-20 Transmission Side & Clutch Arm Nut Kit Harley-Davidson Big Twin 4 Speeds To 1984 - Chrome Plated
3 reviews $14.74

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

Colony #8007-2 Intake Manifold Nuts 1936-1939 61 c.i. Knucklehead & 1930-1948 Sidevalve (Except 45's) - CAD Plated
$29.34

Cycle Standard Replacement Oil Tank Cap Harley-Davidson OEM #62644-84T
7 reviews $14.54

Colony #3265-1 Upper Bearing Dust Shield 1949-Up Harley-Davidson Big Twin 4-Speed Pre-2017 Softail Pre-2005 Dyna/FXR to 2005 1980-2013 Touring 1982-2003 Sportster - Zinc Plated
5 reviews $7.26

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 #2018-8 Head Bolt Washers 1984-Early 1985 Harley-Davidson Big Twin/XL - CAD Plated
$28.97

Colony #2106-4 Countersunk Gas Tank Mounting Kit 1998-Up Harley-Davidson FLT - Chrome Plated
$14.34

Colony #9664-8 Linkert Carb Mounting Screws Harley-Davidson OEM #27424-48 - Parkerized
4 reviews $9.56

Colony #2744-10 Center Stand Mounting Kit 1958-1981 Harley-Davidson FL/FLH
2 reviews $28.60

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

Colony #8601-8 Hi-Torque Cylinder Base Nut Set Harley-Davidson Big Twin Pre-Evo - Black
2 reviews $28.60

Colony #9783-4 Headlight Visor Mounting Allen Bolt Kit 1959-Up Harley-Davidson XL/FX/FXR - Chrome Plated
3 reviews $4.76

Cycle Standard Clutch Cable OEM #38618-52 1952-1967 Harley-Davidson FL/EL
1 review $28.45

Cycle Standard Filler Neck- Thread In Style Gas Cap Weld In Bung- Right Hand Thread -1996 & Up Caps - Vented
8 reviews $14.22

Colony #8916-17 Primary Cover Allen Head Screw Kit 1985-Up Harley-Davidson FXR 1985-1999 FLT - Chrome Plated
3 reviews $28.42

Colony #3553-3 Rear Axle Mount Kit 1989-Up Harley-Davidson Big Twins & XL - Chrome Plated
3 reviews $9.38

Gasbox CV Carburetor Support Bracket - 1999 - 2006 Harley-Davidson Twin Cam
9 reviews $27.99

Colony #7113-2 Acorn Head Generator Screw Set - 1958-1969 Harley-Davidson 74's - Chrome Plated
$13.94

Colony #7114-2 Acorn Head Generator Screw Set - 1936-1957 Harley-Davidson 74's - Chrome Plated
$13.94

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

Colony #3292-9 Rear Chain Guard Mounting Kit 1963-1982 Harley-Davidson FL/FLH - CAD Plated
$13.92

Colony #2745-2 Oversized Ignition Timer Cover Stud Kit 1972-1979 Harley-Davidson Big Twin - Zinc Plated
$13.92

Colony #2540-2 Ignition Timer Cover Stud Kit 1980-Up Harley-Davidson Big Twin/XL - Zinc Plated
$13.92

Colony #2363-3 Wheel Cylinder 3/8"-24 Banjo Bolt 1958-1972 Harley-Davidson FL/FLH - CAD Plated
$13.92

Colony #2415-4 Handlebar Riser Custom Washer Kit 1973-Up Harley-Davidson - Chrome Plated
1 review $27.83

Colony #9917-8 Rocker Arm Heat Treated Stud Kit 1948-1965 Harley-Davidson Panhead
2 reviews $27.75

The Rough Trade Passenger Peg Mounts For Harley-Davidson Duo-Glides
$27.69

Colony #8616-4 Rocker Shaft End Caps 1971-Up Harley-Davidson Shovelhead 1971-1984 XL - Black
$27.51

Colony #8615-4 Rocker Shaft End Caps 1971-Up Harley-Davidson Shovelhead 1971-1984 XL - CAD Plated
$27.51

Colony #2702-7 Gas Tank Shut Off Rod Upper Kit 1940-1965 Harley-Davidson Big Twin/45s - Chrome Plated
$27.50

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

Colony #8729-12 Rubberized Cork Pushrod Cover Seals 1957-1979 Harley-Davidson XL 1936-1947 Knucklehead
1 review $9.08

Colony #2076-10 Gas Tank Mounting Acorn Kit 1991-Up Harley-Davidson Dyna - Chrome Plated
2 reviews $27.23

Colony #2315-6 Foot Brake Lever Stud 1936-1938 Harley-Davidson Knucklehead
$27.07

Colony #8943-27 Headlamp Restoration Kit 1935-1948 Harley-Davidson Springers - CAD Plated
$27.07

Colony #8823-10 Coil Mounting Stud Kit 1948-1955 Harley-Davidson Big Twin 1948-1955 45s OEM #72341-48 - CAD Plated
3 reviews $13.40

Cycle Standard Brake Pedal Pad 1965-Up Harley-Davidson FL OEM #36956-65TA
$26.71

Colony #2563-2 Panel Switch Knob And Screw Kit 1939-1943 Harley-Davidson Big Twin/45s - Parkerized
1 review $13.20

Colony #8834-10 Sprocket Nut & Bolt Kit Allen Head 1973-Up Harley-Davidson Big Twin/XL - Spoked Wheel - Chrome Plated
1 review $26.40

Colony #9529-12 Pushrod Cover O-Ring Seal Kit Harley-Davidson Big Twin Evo/Twin Cam/Sportster
3 reviews $8.78

Cometic Gasket Inc. Cam Change Gasket Kit - 1993-99 Harley-Davidson Big Twin
$26.20

Colony #9866-18 Transmission Mounting Kit 1986-Up Harley-Davidson FXST - Chrome Plated
$26.07

Colony #8707-6 Tappet Oil Screen/Oil Pump Check Valve/Relief Valve Plug Set 1981-Up Harley-Davidson Big Twin OEM #26263-80 - Chrome Plated
4 reviews $26.07

Colony #8752-19 Transmission Side Cover 1936-1984 Harley-Davidson Big Twin - Chrome Plated
$26.06

Colony #8751-19 Transmission Side Cover Long Acorn 1936-1984 Harley-Davidson Big Twin - Chrome Plated
$26.06

Colony #8799-12 Primary Cover Screw Kit 1969-1969 Harley-Davidson Big Twin - Chrome Plated
$26.06

Colony #3671-5 Disc Rotor Allen Screw & Nut Kit 1979-1991 XL/FX (Cast Wheel) - Zinc Plated
$12.93

Til Death Cycles TDC Oversize Seat Mount Nut Kit
$25.82

Colony #9864-6 Grease Fitting Zerk Type 1936-1984 Harley-Davidson - CAD Plated
3 reviews $12.74

Cycle Standard Shift Lever - 1985-2006 Harley-Davidson Big Twin/Twin Cam - Chrome - OEM #33715-85A
1 review $25.33

Colony #2713-42 Instrument Panel Base Restoration Kit 1947-1957 Harley-Davidson Big Twins
$25.30

Colony #2696-5 Linkert Low Speed Needle Valve 3-1/2 inch 1948-1965 Harley-Davidson Type 2 Heads
$25.30

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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