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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FNA Custom Cycle Carb Arm Support Bracket for Harley-Davidson Ironheads and Shovelheads - Tumbled
$95.00

Burly Brand Slammer Suspension Kit - 2006 - 2017 Harley-Davidson Dyna FXD - Chrome
$387.86 $430.95

Burly Brand Stiletto Shock - Black - 13.5 inch - 1999 - 2017 Harley-Davidson Dyna Models
2 reviews $341.96 $379.95

Colony #3542-1 Speedometer Cable Clip 1954-1965 Harley-Davidson Models - Parkerized
$6.05

Colony #3390-4 Handlebar Clamp Allen Screw Kit 1982-Up Harley-Davidson FX/XL
3 reviews $6.05

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 #3535-6 Timing Cover Screw Kit 1970-1992 Harley-Davidson Shovelhead & Evolution
1 review $7.74

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

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

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 #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 #3529-7 Horn Trumpet Mount 1954-1964 Harley-Davidson Big Twins 1957-1964 Sportster
$19.67

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 #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 #3352-1 Clutch Release Lever Stud 1938-1984 Harley-Davidson Big Twins
1 review $32.99

Arlen Ness Big Sucker Stage 1 Air Filter Kit - Black - 1999-2017 Harley-Davidson Twin Cam
2 reviews $197.96 $219.95

Drag Specialties Clutch Cable Harley-Davidson 4 Speed Big Twin 1968-86 - 56" Long
2 reviews $64.84

Cycle Standard 5 Hole Chrome Derby Cover for Harley-Davidson Big Twins
$26.48

Cycle Standard Direct OEM Replacement Chrome Oil Tank for 1965-1982 Harley-Davidson 4 Speed Models
2 reviews $152.51

Mid-USA 19 x 2.5 Chrome Complete Front Wheel Fits Harley-Davidson Sportster XL & FX 1984-1999
1 review $305.05

Cycle Standard Pop-Up Gas Cap Large Diameter - Black - Dummy - 1996 - Up Harley-Davidson
1 review $40.33

Lowbrow Customs Oil Gauge Adapter Tappet Screen Fitting 1966-1999 Harley-Davidsons
9 reviews $19.81

Mid-USA 21 x 2.15 Black Complete Front Single Flange Wheel Harley-Davidson FXST FXDWG 1984-1999
7 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

Gigacycle Garage 4 piston Rear Brake Bracket 1982-94 and 1999-2000 Harley-Davidson FXR Models
$355.00

Biltwell AlumiCore Grip Set Dual Cable - Black
4 reviews $149.95

Gasbox Tall Chopper Bolt On Sissy Bar - 2006-2017 Dyna
20 reviews $134.95

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 #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 #3350-7 Clutch Release Stud Bushings 1936-1984 Harley-Davidson Big Twins - Parkerized
$24.75

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

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 #3356-4 Rear Fender Support Mount Screws 1984-2000 Harley-Davidson Softail 1980-1986 FXWG - Chrome Plated
1 review $12.46

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
$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

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

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

Mid-USA 16 x 3.00 Black Complete Rear Wheel fits all Harley-Davidson 1979-1999
11 reviews $203.25

Mid-USA 16 x 3.00 Chrome Complete Rear Wheel fits all Harley-Davidson 1979-1999
22 reviews $202.75

Mid-USA 16" x 3.00" Black Wheel for 1973-1984 Harley Big Twin - Front or Rear - Dual Flange
5 reviews $247.55

Colony #3340-3 Gas Tank Fitting Kit 1949 Harley-Davidson Big Twins - CAD Plated
$21.27

Colony #3337-3 Gas Tank Fitting Kit 1964 Harley-Davidson Big Twins - CAD Plated
$21.27

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

Cycle Standard Bungee Nuts - 3/8-16 OEM # 98185-90T
8 reviews $10.37

Cycle Standard Oil filter 1941-1964 Harley-Davidson Big Twins with Remote Oil Filter Unit OEM# 63840-48A
6 reviews $7.51

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

Colony #3304-2 Front Brake Cable Tube Fitting 1949-1971 Harley-Davidson FL - CAD Plated
$7.87

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 #3299-2 Front Brake Cable Nut Washer 1930-1940 Harley-Davidson Big Twin/45's/Servi-car 1930-1934 Singles - CAD Plated
$9.99

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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