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

#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 #2537-5 Rear Brake Rod Pins 1930-1969 Harley-Davidson Big Twin - 5 pack - Parkerized
$17.40

Colony #2184-2 Stem Nut And Lockwasher Kit 1949-Up Harley-Davidson Wideglide - Chrome Plated
3 reviews $17.88

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 #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 1984-1999 Harley-Davidson Softail - Chrome Plated
1 review $14.83

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 #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 #2409-1 Pinion Gear Nut 1954-1989 Harley-Davidson Big Twins
$17.05

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 #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 #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 #2286-1 Sprocket Shaft and Pinion Gear Shaft Nut 1936-E1981 Harley-Davidson Big Twins - Parkerized
$8.80

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 #2414-1 Clutch Pushrod Adjusting Screw Nut 1941-E1984 Harley-Davidson Big Twin 1941-1973 WL/WLA/WLC/ Servi-cars - Parkerized
$6.96

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

Colony #2505-1 Spark Plug Front Cable Clamp 1936-1969 Harley-Davidson 74 OHV - CAD Plated
$7.70

Colony #2384-4 Pinion & Sprocket Shaft Lock Plates 1972-1980 Harley-Davidson Big Twins 1957-1980 XL
1 review $6.05

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

Colony #2085-2 Seat Post Bushing Installation Tool 1958-1984 Harley-Davidson Big Twins - Parkerized
$48.73

Colony #9883-20 Motor Case Flanged Hardware Kit 1996-Up Harley-Davidson Big Twin Evo - Chrome Plated
$43.45

Colony #2149-5 Rear Axle Nut/Grooved Spacer Kit 2000-2002 Harley-Davidson FLT - Chrome Plated
$43.32

#2151-5 Springer Ball Bushing Retainer Harley Servicar Big Twins OEM 54230-45 — Colony #2151-5 Springer Ball Bushing Retainer 1946-1952 Harley-Davidson 45 1946-1949 Big Twin 1946-1957 Servi-car - Parkerized
$39.25

Colony #9926-17 Upper & Lower Motor Mounting Allen Kit 1970-1984 Harley-Davidson Big Twin - Chrome Plated
$39.11

Colony #9884-20 Motor Case Flanged Hardware Kit 1996-Up Harley-Davidson Big Twin Evo - Zinc Plated
$39.11

Colony #2096-14 Headlamp and Horn Bracket Insulator Terminal Kit 1945-1948 Harley-Davidson Big Twin 1945-1957 Servi-car
$36.54

Colony #2011-8 Head Bolt Set 12 Point 1985-1991 Harley-Davidson Big Twin 1986-1992 XL - Chrome Plated
2 reviews $109.99

Colony #9921-56 Rear Fender Strut Mounting Allen Kit 1986-1999 Harley-Davidson FXST/FXSTC/FXSTS/Bad Boy - Chrome Plated
$79.66

Colony #9920-46 Rear Fender Strut Mounting Allen Kit 1986-1999 Harley-Davidson Softail/Fat Boy - Chrome Plated
$73.87

Colony #2020-8 Rocker Shaft End Plug 1957-1970 Harley-Davidson Big Twin - CAD Plated
$35.13

Colony #9988-4 Front Axle Nut Grooved Spacer Kit 1994-1999 Harley-Davidson FLHR/FLHRCI - Chrome Plated
$33.31

Colony #2108-12 Headlamp Bracket Mounting Kit 1955-1959 Harley-Davidson Big Twin - CAD Plated
$34.52

Colony #9974-4 Front Axle Nut Grooved Spacer Kit 1995-1999 Harley-Davidson XL/Dyna - Chrome Plated
$33.31

Colony #2002-13 Tool Box Mounting Kit 1955-1957 Harley-Davidson Big Twin - CAD Plated
$33.00

Colony #9999-3 Front Axle Nut Smooth Spacer Kit 1997-1999 Harley-Davidson FXSTS - Chrome Plated
$31.87

Colony #2147-8 Handlebar Riser Cover Mounting Studs & Chrome Acorns 1949-1959 Harley-Davidson Big Twin - Chrome Plated
1 review $32.89

Colony #2054-10 Sprocket Allen Bolt /Washer Kit Cast Rear Wheels 1993-1996 Harley-Davidson Big Twins 1997-1998 Dyna/FLT - Chrome Plated
$31.87

Colony #2104-13 Transmission Top Cover Phillips Screw Kit 1950-1953 Harley-Davidson Big Twin - CAD Plated
$25.41

Colony #9959-38 Primary Cover Mounting Allen Kit 1999-Up Harley-Davidson FLT - Chrome Plated
$27.75

Colony #2120-2 Front Axle Covers 1973-1984 Harley-Davidson 4 Speed FL 1980-1999 FL/FLHT 1980-1986 FXWG 1984-2006 Softail 1988-1994 FXR - Chrome Plated
1 review $27.50

Colony #2082-5 Front Brake Shoe Pivot Stud Kit 1949-1971 Harley-Davidson FLH 1958-1972 Servi-car - CAD Plated
1 review $27.07

Colony #2103-13 Transmission Top Cover Phillips Screw Kit 1950-1953 Harley-Davidson Big Twin - Chrome Plated
$27.83

Colony #9983-3 Shifter Cam Plunger Kit 1936-1976 Harley-Davidson Big Twin 1940-1973 45s - Parkerized
$21.73

Colony #2069-5 Rear Axle Adjuster Kit 1930-1936 Harley-Davidson 74/80 Twins - CAD Plated
4 reviews $20.99

Colony #2015-6 Oversize Panhead Valve Cover Screws 1948-1965 Harley-Davidson Panhead W/Steel D Rings - Chrome Plated
$21.73

Colony #2014-6 Oversize Panhead Valve Cover Screws 1948-1965 Harley-Davidson Panhead W/Alloy D Rings - Chrome Plated
1 review $21.73

Colony #2000-6 Swing Arm End Plates/Wheel Adjuster 1991-2005 Harley-Davidson Dyna Glide - Chrome Plated
1 review $21.73

Colony #9911-1 Fork Tube Cap 1960-1977 Harley-Davidson - Chrome Plated
$20.65

Colony #9918-8 Rocker Arm Stud Nut Kit 1948-1965 Harley-Davidson Panhead - CAD Plated
2 reviews $19.12

Colony #2088-8 Front or Rear Caliper Mounting Allen Bolts Harley-Davidson Big Twins - Chrome Plated
1 review $19.36

Colony #2014-6 Oversize Panhead Valve Cover Screws 1948-1965 Harley-Davidson Panhead W/Alloy D Rings - CAD Plated
$19.12

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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