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 #3518-2 Front Brake Lever Clevis Pin 1952-1972 Harley-Davidson K/KH/XL 1971-1972 FX 1951-1957 Servi-car - CAD Plated
$7.57

Colony #3531-9 Horn Face Screw & Nut Kit 1931-1957 Harley-Davidson Springer Models - CAD Plated
$11.50

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

Colony #3543-6 Gas Tank Name Plate Gaskets 1940-1946 Harley-Davidsons
$17.25

Colony #3530-6 Spotlight Clamp Kit 1938-1961 Harley-Davidson Models- Chrome Plated
$35.75

Colony #3539-5 Fork Bracket Bolt & Clip Kit 1950-1957 Harley-Davidson OHV - Parkerized
$56.65

Colony #3448-5 Disc Brake Rotor To Hub Allen Screw Kit 1974-1977 Harley-Davidson FX/XL - Zinc Plated
$7.87

Colony #3423-1 Oversized Motor Case Drain Plug Oil Pump Body Plug 7/16-20 1936-1970 Harley-Davidson Big Twin Cases 1937-Up 45 Cases 1968-1984 Oil Pump Body - Parkerized
$5.50

Colony #3422-1 Oversized Motor Case Drain Plug Oil Pump Body Plug 7/16-20 1936-1970 Harley-Davidson Big Twin Cases 1937-Up 45 Cases 1968-1984 Oil Pump Body - Chrome Plated
$6.60

Colony #3501-1 Oil Tank Adapter Fitting For Filter 1950-1964 Harley-Davidson Big Twins - CAD Plated
$8.47

Colony #3500-1 Oil Tank Line Connector Fitting 1950-1964 Harley-Davidson Big Twins - CAD Plated
$8.47

Colony #3497-3 Shift Rod & Shaft Lever Screw Kit 1951-1964 Harley-Davidson FL Foot Gear Shift Rod 1951-E1979 FL Hand Gear Shift Rod - CAD Plated
$9.68

Colony #3496-10 Manifold Inlet Nipples 1948-1954 Harley-Davidson OHV
$19.53

Colony #3491-2 Horn Adjusting Screw Kit 1931-1957 Delco-Remy Horns - Parkerized
$9.68

Colony #3486-3 Brake Operating Shaft Washer Kit 1936-1948 Harley-Davidson Big Twin 1936-1957 Sidecars 1941-1957 Servi-cars - Parkerized
$10.89

Colony #3473-1 Oil Tank Drain Plug 1981-1992 Harley-Davidson FLT 1982-1985 FXR - Zinc Plated
$7.87

Colony #3467-3 Front Exhaust Pipe Port Clamp Bolt & Nut Kit 1965 Harley-Davidson FL/FLH - Zinc Plated
$22.00

Colony #3461-14 Rear Fender Mounting Kit 1930-1936 Harley-Davidson VL - Parkerized
$23.98

Colony #3455-1 Self Tapping Transmission Filler Plug 1936-1957 Harley-Davidson Big Twin - Parkerized
$15.40

Colony #3445-8 Rocker Shaft End Plug & Cap Nut Kit 1971-Up Harley-Davidson Shovelhead 1971-1985 Sportster
2 reviews $31.81

Colony #3426-1 Choke Lever 1938-1965 Harley-Davidson Big Twins - CAD Plated
$32.99

Colony #3379-1 Speedometer Cable Clip 1929 Harley-Davidson JD 1930-1936 All Models - Parkerized
$21.99

Colony #3368-2 Air Cleaner Connection Mounting Screws 1929-1931 Harley-Davidson 45 Twins 1930-1932 74" Twins - CAD Plated
$6.66

Colony #3344-4 Shock Mount Bolt Kit 1984-1999 Harley-Davidson Softail - Chrome Plated
1 review $27.50

FNA Custom Cycle Carb Arm Support Bracket for Harley-Davidson Ironheads and Shovelheads - Polished
$135.71

Arlen Ness Big Sucker Stage 1 Air Filter Kit - Black - 1999-2017 Harley-Davidson Twin Cam
2 reviews $215.96 $239.95

Cycle Standard Master Cylinder Rebuild Kit Replaces Harley-Davidson OEM #42382-87A
3 reviews $61.65

Fast Eddy Co. No.11 Motorcycle Neck Bearing Cup Installer
9 reviews $239.95

Lowbrow Customs Oil Gauge Adapter Tappet Screen Fitting 1966-1999 Harley-Davidsons
9 reviews $23.97

Mid-USA 21 x 2.15 Black Complete Front Single Flange Wheel Harley-Davidson FXST FXDWG 1984-1999
8 reviews $238.15

Mid-USA 21 x 2.15 Chrome Complete Front Single Flange Wheel Harley-Davidson FXST FXDWG 1984-1999
4 reviews $264.75

Mid-USA 16 x 3.00 Chrome Complete Front Wheel Harley-Davidson FLST 1984-1999
4 reviews $233.50

Colony #3421-1 Oversized Motor Case Drain Plug 1936-1970 Harley-Davidson Big Twin Cases 1937-Up 45 Cases 1968-1984 Oil Pump Body - CAD Plated
$5.50

Colony #3407-14 Timing Cover Screw Kit 1930-1936 Harley-Davidson VL - CAD Plated
$20.63

Colony #3403-8 Cylinder Base Stud Spacers 1978-1984 Harley-Davidson Shovelheads - Zinc Plated
1 review $19.51

Colony #3409-4 Rear Master Cylinder Spacers 1972-E1979 Harley-Davidson - 4 pack - Zinc Plated
$10.89

Colony #3365-2 Carburetor Line Fitting 1952-Up Harley-Davidson Big Twin/XL - CAD Plated
$9.68

Colony #3354-12 Harley-Davidson Windshield Mount Clip Kit 1936-1967 Harley-Davidson Big Twins/Sidecars - Parkerized
$25.58

Colony #3335-4 Wheel Brake Cylinder Mounting Bolts 1958-1972 Harley-Davidson FL/FLH 1958-Up Sidecars - Parkerized
1 review $6.05

Colony #3361-1 Transmission Shift Lever 1930-1936 Harley-Davidson VL 74/80 Twins - Parkerized
$21.65

Colony #3355-4 Rear Fender Support Mount Screws 1984-2000 Harley-Davidson Softail 1980-1986 FXWG - Zinc Plated
$10.04

Colony #3177-2 Piston Lock Ring Tool Pre-1977 Harley-Davidson K/KH 1973-Up FL
6 reviews $82.50

Colony #3353-4 Oil Line Nut & Sleeve Rubber 1949-1964 Harley-Davidson Big Twins 1954-1966 KH/XL - CAD Plated
1 review $12.10

Colony #3348-12 Ignition Switch Mounting Kit 1939-1946 Harley-Davidson All Twins - CAD Plated
1 review $8.71

Colony #3360-7 Headlamp Cowl Screw Set 1960-1984 Harley-Davidson FL 1960-1973 Servi-car - Chrome Plated
$8.47

Colony #3357-3 Carburetor Mounting Screws 1930-1936 Harley-Davidson VL - CAD Plated
$7.66

Colony #3362-1 Battery Upper Bolt Lock Plate 1930-1936 Harley-Davidson VL 74/80 Twins - Parkerized
$15.72

Gasbox Gorilla Headlight Mount for Harley FL 41mm Wide Glide Front Forks
$34.95

Mid-USA 21 x 2.15 Chrome Complete Front Wheel fits Harley-Davidson FL Shovelheads 1973-1984
7 reviews $184.92 $205.00

Mid-USA 21 x 2.15 Black Complete Front Wheel fits Harley-Davidson Sportster XL & FX 1984-1999
13 reviews $334.00

Colony #3340-3 Gas Tank Fitting Kit 1949 Harley-Davidson Big Twins - CAD Plated
1 review $26.00

Colony #3337-3 Gas Tank Fitting Kit 1964 Harley-Davidson Big Twins - CAD Plated
$26.00

Colony #3294-16 Spotlight Mounting Kit 1949-1978 Harley-Davidson Big Twin - Parkerized
1 review $16.94

Lowbrow Customs Chrome Solo Seat Bolt-On Spring Mounts for Harley-Davidson Swingarm Frames 1958 - 1985
1 review $41.61

Lowbrow Customs Bottom Mount Headlight Bracket Harley-Davidson Springers 1936 - 1949
2 reviews $53.41

Cycle Standard Bungee Nuts - 5/16-18
10 reviews $12.57

Colony #3302-3 Brake and Clutch Rod Pin Kit 1915 -1929 Harley-Davidson Twins - Parkerized
$6.05

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

Colony #3324-2 Front Brake Cable Nut Washer 1930-1940 Harley-Davidson Big Twin/45's/Servi-car 1930-1934 Singles - Parkerized
$9.99

Colony #3293-9 Rear Chain Guard Mounting Kit 1963-1982 Harley-Davidson FL/FLH - Chrome Plated
$18.15

Colony #3323-1 Lighting Cable Clamp 1930-1936 Harley-Davidson All Models - Parkerized
1 review $21.78

Colony #3306-2 Mainshaft Oil Seal Cork Washer & Main Drive Gear Spacer Key 1936-1979 Harley-Davidson Big Twins
$7.26

Colony #3311-1 Motorcase Breather Pipe Nipple Harley-Davidson 1952-1984 K/XL 1965-1967 FL/FLH
2 reviews $8.47

Colony #3300-12 Valve Cover Seal Kit 1930-1936 Harley-Davidson VL 1937-1938 Sidevalves
$14.52

Colony #3313-6 Battery Terminal Screws All 6 Volt 1923-1965 Harley-Davidsons
$16.34

Colony #3318-4 Damper Fork Tube Scew & Washer Kit 1973-1977 Harley-Davidson FX/XL - Zinc Plated
1 review $16.94

Colony #3297-18 Spotlight Mounting Kit 1979-1984 Harley-Davidson FL/FLH - Zinc Plated
$17.55

Colony #3298-18 Spotlight Mount Kit 1979-1984 Harley-Davidson FL/FLH - Chrome Plated
1 review $22.55

Colony #3281-16 Saddlebag Guard Mount 1965-1967 Harley-Davidson FL/FX - CAD Plated
$37.40

Lowbrow Customs Narrow Rabbit Ears Handlebars - 1 inch - Black
14 reviews From $143.20

Colony #3291-2 Brake Cable Clevis Clamp & Nut 1949-1971 Harley-Davidson EL/FL/FLH 1971-1972 FX 1952-1972 K/XL 1951-1971 45's/Servicar
2 reviews $9.68

Colony #3279-22 Exhaust System Mounting Kit 1941-1947 Harley-Davidson Knucklehead/Panhead - Parkerized
$25.08

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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