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 #8921-5 Transmission Shifter Cover Acorn Head Screw Kit 1987-Up Harley-Davidson Evo FX/FL/Softail - Chrome Plated
$17.52

Colony #3175-6 Fork Panel Mounting Kit 49-70 Harley Davidson Big Twins XL — Colony #3175-6 Fork Panel Mounting Kit 1949-1970 Harley-Davidson Big Twin/XL - CAD Plated
1 review $17.42

Colony #3038-18 Gas Tank Mounting Kit 1937-1975 Harley-Davidson Big Twins 1971-1972 FX - Parkerized
1 review $17.42

Colony #2997-6 Chain Tensioner Pad and Lockwasher Kit 1965-2000 Harley-Davidson FL/FX
$17.28

Colony #7130-10 Circuit Breaker & Relay Screw Kit - 1936-1957 Harley-Davidson Big Twins - Chrome Plated
$17.22

Colony #8851-4 Footpeg Mounting Shoulder Bolt & Nut Kit 1969-Up Harley-Davidson FX/FL/XL OEM #4721 - Chrome Plated
$17.22

Colony #7148-3 Oil Line/Vent Fitting - Pre-1965 Harley-Davidson Davidson Big Twin - Chrome Plated
1 review $17.22

Colony #7009-1 High Crown Acorn Stem 1-24 inch Thread - 1930-1977 Harley-Davidson 74s - Chrome Plated
3 reviews $17.14

Colony #9861-2 Custom Hex Transmission Fill Plug/Dip Stick - 1987-Up Harley-Davidson Big Twin - Chrome Plated
1 review $17.14

Colony #3738-1 Pinion Gear Nut 1990-1992 Harley-Davidson Big Twins
$17.05

Colony #3607-13 Horn Mounting Kit 1946-1948 Harley-Davidson All Models
$17.05

Colony #2582-3 Shifter Lever Stud Kit 1938-1946 Harley-Davidson 45s & Big Twins with Handshift - Parkerized
$16.94

Colony #3295-16 Spotlight Mounting Kit 1949-1978 Harley-Davidson Big Twins - CAD Plated
1 review $16.94

Colony #2874-1 Rear Axle Spacer 1967-1972 Harley-Davidson FL/FLH - Parkerized
1 review $16.94

Colony #2623-1 Oil Pressure Switch Nipple 1939-1969 Harley-Davidson Big Twins - CAD Plated
$8.47

Colony #9682-5 Air Cleaner Mounting Screw & Lock Kit 1936-1955 Harley-Davidson Twins - Parkerized
1 review $16.94

Colony #7821-6 Air Cleaner Mounting Screw & Lock Kit 1956-1965 Harley-Davidson Big Twins
$16.94

Colony #9835-8 Chrome Countersink Washer Set for 5/16" Flat Head Socket Harley-Davidson - Chrome Plated
$16.73

Colony #7816-1 Acorn Motor Sprocket Nut 1955-1976 Harley-Davidson Big Twin - Chrome Plated
1 review $16.73

Colony #2530-6 Gas Tank Allen Mounting Kit 1985-1956 Harley-Davidson FXWG/FXST/FXSB/FXEF - Chrome Plated
1 review $16.70

Lowbrow Customs Slick Bungee Nuts - 3/8"-16
2 reviews $16.60

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

Colony #3574-1 Gas Tank Rubber Divider 1939-1979 Harley-Davidson Big Twins
$16.50

Colony #2490-1 Seat Post/Frame Tube/Frame Head Wire Clip 1936-1949 Harley-Davidson Big Twin - Parkerized
$16.50

Colony #8118-1 Transmission Filler Plug 1936-Up Harley-Davidson Big Twins - Chrome Plated
1 review $16.50

Colony #8103-16 Lifter Base Screw Kit 1936-1953 Harley-Davidson Big Twin & 1937-1973 45's - CAD Plated
$16.35

Colony #2848-8 Batwing Fairing Spotlight and Turn Signal Bracket Mounting Kit 1996-Up Harley-Davidson - Chrome Plated
$16.34

Colony #3533-3 Front Brake Cable Clip 1950-1971 Harley-Davidson FL/FLH - CAD Plated
2 reviews $16.34

Colony #3777-1 Fuel Strainer Flexible Hose Nipple 1950-1965 Harley-Davidson Twins
1 review $7.87

Colony #2948-3 Circuit Breaker Mounting Clamp & Stud Kit 1966-1969 Harley-Davidson FL/FLH - CAD Plated
1 review $15.73

Colony #8213-8 Oil Tank Mounting Kit - 1936-1957 Harley-Davidson Knucklehead/Panhead - CAD Plated
1 review $15.73

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

Colony #8808-2 Stem Nut/Lockwasher Kit 1949-Up Harley-Davidson Wideglide - CAD Plated
2 reviews $15.52

Colony #3578-28 Footboard Pad Rivets 1941-1965 Harley-Davidson All Models
$15.40

Colony #8407-1 Self Tapping Transmission Filler Plug 1936-Up Harley-Davidson Big Twin - CAD Plated
$15.40

Colony #3721-1 Ovesize Allen Timing Plug 1970-1998 Harley-Davidson Dyna 1970-1999 Softail 1970-2003 Sportster - CAD Plated
$7.58

Colony #9834-8 Chrome Countersink Washer Set for 1/4" Flat Head Socket Harley-Davidson - Chrome Plated
$15.14

Colony #7609-6 Rocker Stud Lock Kit 1930-1948 Harley-Davidson Big Twin Springers
$15.14

Drag Specialties 35mm Upper Fork Slider Bushing 1984-1987 Harley-Davidson FX/FXE/FXR 84-87 XL OEM# 45413-84
$14.93

Colony #3170-12 Rubber Pushrod Cover Seals 1936-79 Harley Davidson Panhead Shovelhead — Colony #3170-12 Rubber Pushrod Cover Seals 1936-1979 Harley-Davidson Panhead/Shovelhead
2 reviews $7.45

Colony #9872-10 License Plate Mounting Kit Button Allen Harley-Davidson - Chrome Plated
3 reviews $7.45

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

Colony #2130-4 Handlebar Riser Allen Bolt Kit 1/2-13 x 3-1/2" - Chrome Plated
$14.89

Colony #8773-12 Footboard Hinge Bolt Kit 1941-1981 Harley-Davidson OEM #2954-14 - CAD Plated
2 reviews $14.89

Colony #8158-8 Linkert Carb Mounting Screws OEM #27422-39 - Chrome Plated
$14.74

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

Colony #2694-3 Oil Tank Oil Line Fitting Kit 1938-1964 Harley-Davidson Big Twins
$14.52

Colony #2724-10 10mm Brake Line Banjo Bolt Crush Washers 2008-Up Harley-Davidson Touring 2006-Up VRSC - 10 pack
7 reviews $14.52

Colony #2071-10 Inner Primary Cover Chain Guard Kit 1936-1964 Harley-Davidson Big Twin - Chrome Plated
1 review $14.34

Colony #2769-4 Kick Starter Pedal Mounting Kit 1917-1941 Harley-Davidson - Parkerized
$14.30

Colony #2292-8 Front Fender Mounting Kit 1951-1978 Harley-Davidson FL/FLH - Chrome Plated
$14.16

Colony #8444-2 Generator Cap Screw Set Harley-Davidson 1936-57 Knuckle Pan - Chrome Plated
$13.94

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

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

Colony #2460-2 Rear Fender Brace Bracket Bolt Kit 1923-1940 Harley-Davidson Twins - Parkerized
$13.92

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

Colony #2353-2 Foot Clutch Lever Bracket Spring Stud 1940-1978 Harley-Davidson Big Twin 1940-1952 45s
$13.92

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

Colony #2003-6 Tool Box Mounting Kit 1958-Early 1962 Harley-Davidson Big Twin - CAD Plated
$13.92

Colony #2664-5 Oversized Carburetor Throttle Lever Wire Block Kit Linkert & Bendix Carburetors - CAD Plated
$13.62

Colony #2658-5 Carburetor Throttle Lever Wire Block All Harley-Davidson Linkert & Bendix Carburetors - CAD Plated
$13.62

Colony #9863-5 Transmission Case Bottom Stud Kit 1984-Up Harley-Davidson Softail
1 review $13.55

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

Colony #8744-12 Oil Pump Mounting Kit 1978-1991 Harley-Davidson Big Twin - Chrome Plated
1 review $13.40

Colony #3735-4 Linkert Carburetor Gasket Kit 1933-65 Harley-Davidson
1 review $13.20

Colony #3637-2 Oil Line Tube Seals 1992-1999 Harley-Davidson Big Twins
$6.60

Colony #3602-1 Springer Headlight Lens Gasket 1935-Up Harley-Davidson Knucklehead/Panhead/WL/Servi-car/Hummer
$13.20

Colony #9813-12 Beehive Tail Lamp Mounting Kit 1936-1946 Harley-Davidson - Parkerized
$13.20

Colony #3572-5 Front Disc Brake Rotor Screw Set 2006-Up Harley-Davidson Dyna - Zinc Plated
$13.01

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

Drag Specialties High-Performance Mineral Primary Oil for Big Twins - 1 quart
$12.95

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

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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