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 #2442-8 High Performance Cylinder Studs 1983-1999 Harley-Davidson Big Twin Evo
$120.18

Colony #2487-2 Pike Nut Rear Axle Covers 1984-2007 Harley-Davidson Softail - Chrome Plated
4 reviews $69.58

Colony #2264-2 Pike Nut Front Axle Covers 1988-2007 Harley-Davidson Sportster 1991-2003 Dyna - Chrome Plated
4 reviews $54.14

Colony #2263-2 Pike Nut Front Axle Covers 1972-1999 Harley-Davidson FL 80-86 FXWG 84-06 Softail 88-94 FXR - Chrome Plated
2 reviews $54.14

Colony #2260-2 Pike Nut Rear Axle Covers 1989-2004 Harley-Davidson XL 1991-2005 Dyna - Chrome Plated
2 reviews $54.14

Colony #2232-4 Headbolt Smooth Covers 1985-Up Harley-Davidson FL/FX/XL - Chrome Plated
1 review $52.14

#2256-5 Chrome Front Axle Nut Spacers Washer Kit Harley Dyna 04-05 — Colony #2256-5 Front Axle Nut Washer Spacers Kit 2004-2005 Harley-Davidson Dyna - Chrome Plated
$43.45

Colony #2205-4 Swing Arm Pivot Hex Bolts 1984-1999 Harley-Davidson Softail - Chrome Plated
$47.38

Colony #2493-6 Rear Fender Frame Clamp Bolt Kit 1936-1957 Harley-Davidson Big Twin - Parkerized
1 review $42.38

Colony #2379-36 Transmission Top Cover Mounting Kit 1915-1930 Harley-Davidson Twins - Parkerized
$42.38

Colony #2429-1 Gear Shaft Nut Installation Tool L1954-1989 Harley-Davidson Big Twins
1 review $41.75

Colony #2407-8 Chain Adjuster Swingarm End Cover Kit 1985-1996 Harley-Davidson FLT - Chrome Plated
$41.29

Colony #2456-10 Tool Box Mounting Kit 1931-1934 Harley-Davidson Twins - Parkerized
$39.22

Colony #2181-6 Handlebar Grip Retainer Kit 1949-1953 Harley-Davidson Big Twins/45's/K Model - Chrome Plated
1 review $38.50

Colony #2498-1 Pike Nut Fork Tube Cap/Plug 1973-1985 Harley-Davidson Sportster - Chrome Plated
$35.42

Colony #2306-16 Electrical Terminal Plate 1959-1969 Harley-Davidson Big Twin
$33.84

Colony #2305-12 Electrical Terminal Plate 1949-1957 Harley-Davidson Big Twin
3 reviews $33.84

Colony #2452-2 Clutch Tension Adjusting Nut and Lock Washer 1936-1940 Harley-Davidson Big Twin - Parkerized
$31.63

#2371-1 Fork Tube Bolt OEM 45993-86 Harley XL FX 85-87 — Colony #2371-1 Fork Tube Bolt 1985-1987 Harley-Davidson XL/FX - Chrome Plated
$31.50

Colony #2277-10 12 Point Sprocket Bolt and Washer Kit 1979-1990 Harley-Davidson XL 1973-1992 Big Twin - Chrome Plated
1 review $30.79

#2372-1 Fork Tube Bolt OEM 45993-73 Harley XL FX 73-85 — Colony #2372-1 Fork Tube Cap/Bolt 1973-1985 Harley-Davidson XL/FX - Chrome Plated
1 review $32.60

Colony #2419-8 Cylinder Base Pike Nut Set 1978-1984 Harley-Davidson Shovelhead - Chrome Plated
$29.73

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

Colony #2310-5 Oversized Foot Brake Lever Stud 23/32" OD 1939-1957 Harley-Davidson UL/Panhead/Knucklehead 1939-1973 WL/WLA/WLC/Servi-car
1 review $27.07

Colony #2519-2 Front Axle Smooth Covers 1991-2003 Harley-Davidson Dyna 1988-2007 Sportster - Chrome Plated
1 review $27.50

Colony #2436-10 #2438-5 Gas Tank Pike Nut Mounting Kit 1991-Up Harley-Davidson Dyna - Chrome Plated
1 review $27.23

Colony #2203-8 Safety Guard Mounting Kit 1937-1947 Harley-Davidson Big Twins 1955-1957 Panhead - Parkerized
$25.05

Colony #2541-19 Luggage Carrier Mounting Kit 1950-1953 Harley-Davidson Big Twin - Parkerized
1 review $24.04

Colony #2412-2 Crank Pin Nut Set 1954-E1981 Harley-Davidson 61"/80"
$32.00

Colony #2543-10 Circuit Breaker to Coil Wire Assembly 1949-1964 Harley-Davidson Twins
$24.20

Colony #2364-16 Lifter Base Screw Kit 1954-1975 Harley-Davidson Big Twins - Chrome Plated
2 reviews $22.78

Colony #2321-4 Rear Chain Oiler 1954-1962 Harley-Davidson Panhead - CAD Plated
$22.00

Colony #2304-2 Handlebar Plunger 1949-1953 Harley-Davidson Big Twins/45's/Hummer Models
1 review $20.31

#2365-16 Lifter Base Screw Kit Special Harley Big Twins 54-75 — Colony #2365-16 Lifter Base Screw Kit 1954-1975 Harley-Davidson Big Twins - CAD Plated
$20.57

Colony #2368-8 Cylinder Head Motor Brace Mounting Kit 1948-1965 Harley-Davidson Panhead - Parkerized
$20.85

Colony #2351-2 Foot Clutch Lever Pivot Shaft 1936-1940 Harley-Davidson Big Twins1941-1952 45s
$20.88

Colony #2527-8 Rear Fender Rail Mounting Kit 1980-1985 Harley-Davidson FXWG - Chrome Plated
$19.48

Colony #2185-4 Upper Bracket BoltAnd Lock Kit 1949-1984 Harley-Davidson FL 1958-1973 Servicar - CAD Plated
$19.36

Colony #2528-10 Gas Tank Allen Mounting Kit 1990-1995 Harley-Davidson Softail - Chrome Plated
$17.40

Colony #2477-10 Front Safety Guard Mounting Kit 1948-1950 Harley-Davidson 61"/74" Twins - Parkerized
$20.00

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

Colony #2522-6 Rear Fender Rail Mounting Kit 1973-1985 Harley-Davidson FX - Chrome Plated
$16.01

Colony #2331-20 Battery Box Mounting Kit 1965-1984 Harley-Davidson FX/FL
$15.73

Colony #2501-12 Rear Brake Rod Mounting Kit 1930-1969 Harley-Davidson Big Twin - Parkerized
1 review $15.31

Colony #2476-2 Generator Pole Shoe Screws Kit 1958-1969 Harley-Davidson Big Twin 1958-1981 XL - Parkerized
$15.31

Colony #2438-5 Gas Tank Pike Nut Mounting Kit 2000-Up Harley-Davidson Softail - Chrome Plated
1 review $14.83

Colony #2546-1 Wire Clip Frame Head Tube 1950-1960 Harley-Davidson Big Twin - Parkerized
$16.50

Colony #2491-1 Battery Light Wire Clip 1930-1948 Harley-Davidson Big Twin - Parkerized
$16.50

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

Colony #2489-1 Frame Head Tube Wire Clip 1961-1984 Harley-Davidson Big Twin - Parkerized
$16.50

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

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

Colony #2564-3 Rear Brake Caliper Anchor Arm Bolt Kit 1981-1985 Harley-Davidson Big Twin - Chrome Plated
$14.30

Colony #2288-1 Sprocket Shaft Nut 1972-1985 Harley-Davidson Big Twins - Parkerized
1 review $17.05

Colony #2560-2 Panel Switch Knob And Screw Kit 1939-1943 Harley-Davidson Big Twin/45s - Chrome Plated
$14.85

Colony #2481-6 Clutch Spring Guide Stud Lock Nuts 1941-1946 Harley-Davidson Big Twin/45's/Servi-cars - Parkerized
1 review $12.10

Colony #2290-8 Front Fender Mounting Kit 1951-1978 Harley-Davidson FL/FLH - Parkerized
$11.17

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

Colony #2296-1 Transmission and Oil Tank Drain Plug 2000-Up Harley-Davidson Big Twin - Chrome Plated
$12.10

#2295-1 Transmission and Oil Tank Drain Plug Chrome Harley Big Twin 2000-up — Colony #2295-1 Custom Transmission and Oil Tank Drain Plug 2000-Up Harley-Davidson Big Twin - Chrome Plated
$12.10

Colony #2544-1 Foot Clutch Lever Bracket Spring Stud 1936-1939 Harley-Davidson Big Twin
$9.75

Colony #2426-2 Clutch Pushrod Adjusting Screw Lock Nut 1936-1940 Harley-Davidson Big Twin - Parkerized
$9.75

Colony #2526-4 Rear Master Cylinder Allen Mounting Kit 1984-1985 Harley-Davidson FX - Chrome Plated
$9.05

Colony #2524-2 Gas Tank Allen Mounting Kit Pre-1984 Harley-Davidson Big Twin - Chrome Plated
$9.05

Colony #2329-9 Voltage Regulator Mounting Kit 1965-1969 Harley-Davidson FL/FLH
$8.20

Colony #2455-3 Carburetor Mounting Screws 1937-1939 Harley-Davidson Big Twins 1940 WL/WLD- Parkerized
$7.66

Colony #2504-1 Horn Wire Clip 1938-1948 Harley-Davidson Big Twin 1940-1957 45's/Servi-car - Parkerized
1 review $7.87

Colony #2503-4 Brake Light Switch Mounting Kit 1939-1957 Harley-Davidson Big Twin - Parkerized
2 reviews $7.57

Colony #2413-6 Crank Pin Nut Lock Plates 1954-1980 Harley-Davidson Big Twins
$7.57

Colony #2323-6 Air Cleaner Backing Plate Mounting Screws 1966-1977 Harley-Davidson Big Twin 1956-1977 XL
$11.00

Colony #2284-2 Tappet Oil Screen 2000-Up Harley-Davidson Softail
$5.95

Colony #2520-1 Timer Wire Clip 1938-1965 Harley-Davidson Big Twin - CAD Plated
1 review $5.57

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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