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 #2127-11 Generator Brush Positive Terminal Screws/Fittings 1958-1969 Harley-Davidson FL/FLH 1958-1981 XL 1958-1965 Servi-Car
3 reviews $19.36

Colony #2087-1 Seat Post Bushing Installation Tool 1929-Up Harley-Davidson 45 Singles 1930-1935 VL - Parkerized
$19.80

Colony #9984-24 Valve Cover Washers 1954-1965 Harley-Davidson Panhead - Chrome Plated
$15.52

Colony #2100-16 Lifter Base Phillips Screw Kit 1950-1953 Harley-Davidson Big Twin 1952-1956 K Models - CAD Plated
$18.52

Colony #2138-4 Handlebar Riser Hex Bolt Kit 1/2-13 x 3-1/2" - Chrome Plated
1 review $14.89

Colony #2135-4 Handlebar Riser Hex Bolt Kit 1/2-13 x 2-1/2" - Chrome Plated
1 review $14.89

Colony #2134-4 Handlebar Riser Allen Bolt Kit 1/2-20 x 3" - Chrome Plated
$14.89

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

Colony #2129-4 Handlebar Riser Allen Bolt Kit 1/2-13 x 3" - Chrome Plated
5 reviews $14.89

Colony #9886-12 Floorboard Hinge Bolt Kit 1914-1940 Harley-Davidson All Models - Parkerized
2 reviews $14.74

Colony #2077-5 Gas Tank Mounting Acorn Kit 2000-Up Harley-Davidson Softail - Chrome Plated
2 reviews $14.83

Colony #9874-2 Oil Screen Plug 1966-1969 Harley-Davidson Big Twins - Chrome Plated
$14.34

Colony #2072-4 Gas Tank Mounting Kit Countersunk 1991-1999 Harley-Davidson Softail - Chrome Plated
$14.34

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

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

Colony #9967-4 Top Motor Mount to Cylinder Head Hardware 1993-Up Harley-Davidson Big Twin 1986-Up XL - Zinc Plated
$12.74

Colony #9965-4 Footpeg Mounting Shoulder Bolt/Nut Kit 1952-Up Harley-Davidson FX/FL/XL - CAD Plated
$13.16

Colony #2090-2 Swing Arm End Plates 19819-1994 Harley-Davidson FXR 1979-2001 FLT - Chrome Plated
3 reviews $12.74

Colony #2001-2 Swing Arm End Plates 1991-Up Harley-Davidson Dyna Glide - Chrome Plated
$12.74

Colony #9907-4 Fork Slider Drain Screws 1952-1972 Harley-Davidson K/XL/FX - Chrome Plated
$11.96

Colony #9876-2 Oil Screen Plug 1970-1980 Harley-Davidson Big Twins - Chrome Plated
$11.96

Colony #9981-8 Front Fork and Back Panel Mounting Button Allen Kit 1987-Up Harley-Davidson FLSTC/FLSTF/FLSTN
$11.90

Colony #2109-12 Rear Master Cylinder and Cover Allen Hardware Kit 1982-1994 Harley-Davidson FXR 1984-1995 Softail - Chrome Plated
$11.17

Colony #9935-8 Transmission to Motor Mount Allen Kit 1999-2006 Harley-Davidson Twin Cam/Dyna/FLT 2000-2006 Softail - Chrome Plated
$11.14

Colony #9930-14 Intake Manifold to Cylinder Head Allen Kit 1982-1989 Harley-Davidson Big Twins
$10.37

Colony #9871-10 License Plate Mounting Kit Flat Head Allen Harley-Davidson - Chrome Plated
$10.76

Colony #2006-3 Headlamp Mounting Kit 1949-1959 Harley-Davidson Big Twins 1952-1958 XL/K/KH - CAD Plated
$10.76

Colony #2042-5 Rear Axle Clip 1991-Up Harley-Davidson FL/FX/XL OEM #510 - Chrome Plated
1 review $12.10

Colony #2041-7 Front Wheel Brake Cable Tube Clamp 1952-1972 Harley-Davidson KH/XL/XLH/XLCH 1971-1972 FX - CAD Plated
1 review $16.50

Colony #9962-6 Handlebar Clamp & Gauge Mount Kit 1995-Up Harley-Davidson FX/XL - Chrome Plated
$9.31

Colony #9957-2 Air Cleaner Mounting Nut 1983-Up Harley-Davidson Big Twins - Chrome Plated
$9.16

Colony #9915-4 Seat Bracket Button Head Mounting Kit 1987-Up Harley-Davidson Softail/Fat Boy - Chrome Plated
$8.93

Colony #9905-16 Floorboard Stud Mounting Kit 1936-1957 Harley-Davidson Big Twins - Parkerized
$13.75

Colony #9966-4 Footpeg Mounting Bolt/Nut Kit 1969-Up Harley-Davidson FX/FL/XL - Zinc Plated
$6.78

Colony #9964-2 Fork Tube Bolt Washers 1978-Up Harley-Davidson FL/FXWG/Softail - Chrome Plated
2 reviews $5.18

Colony #9939-6 Oil Filter Adapter Mounting Allen Kit 1999-Up Harley-Davidson Twin Cam Dyna/FLT - Chrome Plated
$4.76

Colony #9916-2 Custom Air Cleaner Cover Countersunk Mounting Kit 1983-Up Harley-Davidson Big Twins - Chrome Plated
$4.76

Colony #9909-2 Fork Slider Drain Screws 1949-E1977 Harley-Davidson FL - Chrome Plated
$3.99

Colony #2007-6 Air Cleaner Mounting Allen Screw Kit 1978-1983 Harley-Davidson Big Twin - Chrome Plated
$4.09

Colony #9963-1 Stem Nut Washer 1971-1985 Harley-Davidson FX 1979-1985 XL 79-85 - Chrome Plated
$2.78

Lowbrow Customs WX Split Gas Tanks - Bolt-On for 1936 - 1984 Big Twin Harley-Davidsons - 2.25 gallon
84 reviews $399.99

Colony #9870-16 Inner Primary Mounting Kit 1986-1993 Harley-Davidson Softail 1991-1993 Dyna Glide
1 review $24.00

Colony #9811-3 Ribbed Rear Axle Spacer Kit 1991-1999 Harley-Davidson Dyna Glide - Chrome Plated
$33.31

Colony #9809-4 Ribbed Rear Axle Nut & Spacer Kit 1984-1999 Harley-Davidson Softail - Chrome Plated
1 review $60.83

Colony #9808-6 Oil Nipple Cap 1915-1964 Harley-Davidson All Models - CAD Plated
1 review $14.85

Colony #9659-1 Gas Strainer Assembly 1932-1938 Harley-Davidson Twins - Nickle Plated
1 review $79.66

Colony #9728-36 Head Bolt Set 1940-Up Harley-Davidson Flathead 45 1930-1947 74/80 Iron Head - Parkerized
4 reviews $97.04

Colony #9726-20 Head Bolt Set 1940-1947 Harley-Davidson Knucklehead - Parkerized
3 reviews $64.09

Colony #9725-20 Head Bolt Set 1936-1939 Harley-Davidson Knucklehead - Parkerized
2 reviews $64.09

Colony #9202-12 Pushrod Covers 1984-Up Harley-Davidson Big Twin Evo 1986-1990 XL - Chrome Plated
1 review $66.63

Colony #9865-20 Upper Pushrod Cover Kit Harley-Davidson Big Twin Evo W/S&S Lifter Blocks - Chrome Plated
$50.08

Colony #9708-18 Rear Fender Mounting Kit 1936-1957 Harley-Davidson Big Twin - Chrome Plated
1 review $50.08

Colony #9695-26 Transmission Mounting Kit 1936-1964 Harley-Davidson Big Twin - Parkerized
2 reviews $49.41

Colony #9661-1 Gas Strainer Assembly 1939-1941 Harley-Davidson Twins - CAD Plated
$55.04

Colony #9627-19 Upper & Lower Motor Mount Kit 1936-1969 Harley-Davidson Big Twin - Parkerized
3 reviews $52.45

Colony #9521-22 Upper & Lower Motor Mount Kit 1937-1947 Harley-Davidson Big Twin Side Valve - Chrome Plated
$47.80

Colony #9522-22 Upper & Lower Motor Mount Kit 1937-1947 Harley-Davidson Big Twin Side Valve - CAD Plated
$43.82

Colony #9855-28 Upper & Lower Motor Mount Kit 1984-1999 Harley-Davidson Softail - Zinc Plated
2 reviews $42.00

Colony #9625-16 Lower Motor Mount Kit 1930-1936 Harley-Davidson VL All 45 's - Chrome Plated
$38.73

Colony #9847-9 Banjo Style Oil Feed Line Fitting Kit 1936-1941 Harley-Davidson Knucklehead - Chrome Plated
$37.66

Colony #9707-18 Rear Fender Mounting Kit 1936-1957 Harley-Davidson Big Twin - Parkerized
2 reviews $42.00

Colony #9638-30 Rear Fender Rail Acorn Screw Kit 1958-1980 Harley-Davidson FL/FLH - Chrome Plated
$37.66

Colony #9407-1 11/16"-16 Thread Repair Tap Harley-Davidson All Split Cases
$37.66

Colony #9857-10 Custom Sprocket Bolt & Washer Kit 1973-Up Harley-Davidson FL/FX 1973-1991 XL W/Cast Rear Wheel - Chrome Plated
$34.76

Colony #9804-2 Handlebar Plunger 1931-1939 Harley-Davidson 45 Solo/Servicar 1931-1936 VL - Parkerized
$38.00

Colony #9698-18 Head Bolt Washer Kit 1940-1947 Harley-Davidson 45/74/80 Alloy Head - Parkerized
$33.31

Colony #9676-5 Seat Bar Bushing Set 1937-1964 Harley-Davidson Big Twin 1929-1952 45 Solo - Parkerized
2 reviews $33.31

Colony #9626-16 Lower Motor Mount Kit 1930-1936 Harley-Davidson VL All 45 's - Parkerized
$32.95

Colony #9848-9 Banjo Style Oil Feed Line Fitting 1936-1941 Harley-Davidson Knucklehead - CAD Plated
$29.70

Colony #9201-33 Windshield Mounting Kit 1949-Up Harley-Davidson FL/FX/XL/K - CAD Plated
$31.14

Colony #9702-2 Intake Manifold Nuts 1936-1939 Harley-Davidson Knucklehead 1930-1948 Sidevalve (Except 45) - Parkerized
2 reviews $29.34

Colony #9786-11 Front Fender Lamp Wire Kit 1935-1947 Harley-Davidson All Models
1 review $30.00

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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