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 #8131-34 Motor Case Kit Stock 1940-1947 Harley-Davidson Knucklehead - Chrome Plated
$58.30

Colony #8724-18 Handlebar Clamp & Gauge Acorn Head Mount Kit 1983-1994 Harley-Davidson FX/XL - Chrome Plated
$20.27

Colony #8413-8 Handlebar Switch Housing Acorn Head Screw Kit 1973-1981 Harley-Davidson Big Twin & Sportster 73-81 - Chrome Plated
$20.27

Colony #8774-18 Footboard Hinge Bolt Buddy Footrest Kit 1941-1964 Harley-Davidson - CAD Plated
$25.00

Colony #8758-10 Disc Brake Rotor to Hub Screw Kit 1978-1982 Harley-Davidson FX/XL - Chrome Plated
3 reviews $21.97

Colony #8745-13 Oil Pump Mounting Kit 1936-1967 Harley-Davidson OHV Big Twins - Chrome Plated
$20.31

Colony #8756-30 Primary Cover Allen Screw Kit 1936-1984 Harley-Davidson Big Twin - Chrome Plated
$30.00

Colony #8923-8 Handlebar Throttle Spark Roller & Pin Kit 1910-1948 Harley-Davidson All Models
1 review $25.00

Colony #8859-1 Seat Post Bushing 1929-Up Harley-Davidson 45 Singles 1930-1936 VL OEM ##3113-29
2 reviews $19.93

Colony #8941-3 Rocker Box Oil Feed Line Fittings 1942-1947 Harley-Davidson Knucklehead OEM #95-42 95-42A - CAD Plated
$19.51

Colony #8840-10 Rear Stand Mounting Kit 1930-1936 Harley-Davidson Side Valve Big Twins 1926-1929 Singles 1926-1935 45's - Parkerized
1 review $22.44

Colony #8928-3 Seat Tee Pivot Bolt 1925-1936 Harley-Davidson J/JD/VL OEM #3107-25 CAD - CAD Plated
1 review $18.72

Colony #8847-5 Disc Brake Rotor to Hub Flat Allen Head Screw 1982-1985 Harley-Davidson Big Twin Cast Wheels - Chrome Plated
$18.72

Colony #8722-16 Handlebar Clamp Mount Kit 1974-Up Harley-Davidson FX/XL/FLST - Chrome Plated
1 review $18.72

Colony #8924-8 Handlebar Throttle Spark Roller & Pin Kit 1954-1974 Harley-Davidson All Models
$20.25

Colony #8866-8 Sprocket Cover / Master Cylinder Mounting Kit Acorn Head 1986-Up Harley-Davidson - Chrome Plated
2 reviews $18.34

Colony #8803-2 Transmission Fill Plug/Dipstick 1985-1986 Harley-Davidson Evo 5 Speed - Chrome Plated
$18.34

Colony #8767-10 Handlebar Lever Mount Master Cylinder Cover Screw Kit 1982-1995 Harley-Davidson FL/FX/XL - Chrome Plated
1 review $17.88

Colony #8850-4 Footpeg Mounting Shoulder Bolt & Nut Kit 1952-1968 Harley-Davidson FX/FL/XL OEM #50970-52 - Chrome Plated
$17.22

Colony #8818-3 Front Brake Cable Adjuster 1950-1971 Harley-Davidson Big Twin 1952-1972 XL 1971-1972 FX - CAD Plated
$17.22

Colony #8872-1 Fork Tube Cap/Bolt 1960-1977 Harley-Davidson OEM #45754-60 - Zinc Plated
$16.73

Colony #8792-5 Disc Brake Rotor to Hub Flat Allen Screw 1980-1981 Harley-Davidson FLT OEM #1643 - Chrome Plated
1 review $17.14

Colony #8808-2 Stem Nut/Lockwasher Kit 1949-Up Harley-Davidson Wideglide - CAD Plated
2 reviews $15.52

Colony #8629-1 Slotted Nut Driver Tool 1/4-24 Nuts All Pre-1930 Harley-Davidson
$15.52

Colony #9006-4 Throttle Cable Bracket 1937-1948 Harley-Davidson Side Valve Big Twin/Iron Head 45's - Parkerized
$19.80

Colony #8771-2 Timing Cover Oil Passage Bolt 1963-1969 Harley-Davidson Big Twin OEM #25218-63 - Chrome Plated
$13.94

Colony #8708-8 Lifter Base Screw Kit 1976-Up Harley-Davidson Big Twin - Chrome Plated
2 reviews $16.26

Colony #8704-2 Tappet Oil Screen Plug 1952-1965 Harley-Davidson Big Twin OEM #24987-52 - Chrome Plated
1 review $13.55

Colony #8754-2 Generator Allen Screw Kit 1958-1969 Harley-Davidson Panhead/Shovelhead - Chrome Plated
1 review $12.74

Colony #8726-8 Lifter Base Allen Screw Kit 1976-Up Harley-Davidson Case To Late Lifter Bases - Chrome Plated
1 review $12.67

Colony #8407-1 Self Tapping Transmission Filler Plug 1936-Up Harley-Davidson Big Twin - CAD Plated
$15.40

Colony #8705-2 Tappet Oil Screen Plug 1966-1969 Harley-Davidson Big Twin OEM #655 - Chrome Plated
$12.34

Colony #9008-5 Spark Cable Clamp 1938-1948 Harley-Davidson Side Valve Big Twin - Parkerized
$14.30

Colony #8710-8 Lifter Base Screw Kit 1976-Up Harley-Davidson Big Twin - Black
$14.34

Colony #8709-8 Lifter Base Screw Kit 1976-Up Harley-Davidson Big Twin - CAD Plated
1 review $14.34

Colony #8769-3 Front Axle Nut & Washer Kit 1972-Up Harley-Davidson Wideglide - Chrome Plated
1 review $11.56

Colony #8766-10 Handlebar Lever Mount Screws 1973-1981 Harley-Davidson Big Twin/Sportster - Chrome Plated
$11.53

Colony #9014-3 Dash Mounting Kit Acorn 1986-Up Harley-Davidson FXR - Chrome Plated
$10.76

Colony #8813-4 Fork Slider Bottom Cap Stud & Nut 1949-1977 Harley-Davidson FLH Wideglide - Chrome Plated
$11.14

Colony #8819-4 Clutch & Brake Lever Pivot Screw Kit 1941-1964 Harley-Davidson Big Twin/45s - CAD Plated
1 review $12.10

Colony #8757-8 Fork Bracket Cover Allen Screw Kit 1952-Up Harley-Davidson XL 1971-Up FX - Chrome Plated
$9.96

Colony #8401-8 Rocker Shaft Cap Nut & Washer Kit 1966-1985 Harley-Davidson Shovelhead 1957-1985 Sportster - CAD Plated
1 review $9.96

Colony #8930-8 Linkert Carb Mounting Screws Harley-Davidson OEM #47248-48 - CAD Plated
1 review $9.56

Colony #8795-4 Handlebar Clamp Allen Screw Kit 1974-1984 Harley-Davidson FX/XL L1977-1984 FL - Chrome Plated
1 review $9.31

Colony #8759-5 Disc Brake Rotor to Hub Screw Kit 1974-1977 Harley-Davidson FX/XL - Chrome Plated
$8.93

Colony #9013-4 Linkert Carb Support Bracket 1936-1952 Harley-Davidson OEM #27432-36 - Parkerized
$12.65

Colony #8854-4 Front Axle Nut Kit 1937-1952 Harley-Davidson 45 Solo OEM #3910-37 - Chrome Plated
$8.36

Colony #8718-4 Cap Head Headlight Visor Mounting Bolt 1959-Up Harley-Davidson XL/FX/FXR - Chrome Plated
$7.17

Colony #8797-4 Handlebar Lever Mount Allen Screw Pre-1972 Harley-Davidson FX/FL/XL - Chrome Plated
$5.96

Colony #8735-24 Valve Cover Screws 45/64 inch Long 1954-1965 Harley-Davidson Panhead With Steel D-Rings - CAD Plated
1 review $34.93

Colony #8733-24 Valve Cover Screws 1-1/4 inch Long 1954-1965 Harley-Davidson Panhead With Alloy D-Rings - CAD Plated
$34.93

Colony #8606-6 Rear Axle Cap Kit 1973-Up Harley-Davidson Big Twin 1979-Up Sportster XL - Chrome Plated
1 review $33.67

Colony #8876-5 Seat Bar Bushing Set 1965-1980 Harley-Davidson Big Twin - CAD Plated
1 review $33.31

Colony #8740-19 Oil Pump Mounting Kit 1936-1967 Harley-Davidson OHV Big Twins - Chrome Plated
$33.00

Colony #8614-4 Rocker Shaft End Caps 1971-Up Harley-Davidson Shovelhead 1971-1984 XL - Chrome Plated
$33.31

Colony #8600-8 Hi-Torque Cylinder Base Nut Set Harley-Davidson Big Twin Pre-Evo - Chrome Plated
2 reviews $32.60

Colony #8873-18 Saddle to Seat Tree Mounting Kit 1934-1980 Harley-Davidson Models (Except FX/XL) - CAD Plated
1 review $35.00

Colony #8223-8 Rocker Shaft End Plug & Cap Kit 1966-1970 Harley-Davidson Shovelhead 1957-1970 XL - CAD Plated
1 review $31.81

Colony #8863-1 Fork Tube Cap/Bolt Mid 1985-1987 Harley-Davidson FX/XL - Chrome Plated
$31.50

Colony #8858-8 Cylinder Base Stud Set 1954-1985 Harley-Davidson K/XL OEM #16830-54 & 16830-72
2 reviews $30.42

Colony #8835-10 Sprocket Bolt & Washer Kit Allen Head 1993-1998 Harley-Davidson Big Twin Spoke Wheel 1979-1990 XL Cast Wheel - Chrome Plated
1 review $30.79

Colony #8821-18 Top of Tank Screw & Washer Kit 1918-1936 All Harley-Davidson 1936-1952 45s - Nickel Plated
$31.14

Colony #8750-14 Transmission Top Cover Allen Screw 1936-1964 Harley-Davidson Big Twin - Chrome Plated
$28.97

Colony #8601-8 Hi-Torque Cylinder Base Nut Set Harley-Davidson Big Twin Pre-Evo - Black
2 reviews $28.60

Colony #8741-19 Oil Pump Mounting Kit 1936-1967 Harley-Davidson OHV Big Twins - CAD Plated
$27.50

Colony #8490-8 Lifter Base Acorn Head Screw Kit Harley-Davidson Late Shovelhead Lifter to 1/4-24 Motor Case - Chrome Plated
$27.51

Colony #8943-27 Headlamp Restoration Kit 1935-1948 Harley-Davidson Springers - CAD Plated
$27.07

Colony #8842-10 Sprocket Allen Bolt & Nut Kit 1985-1992 Harley-Davidson Big Twin - Chrome Plated
$26.40

Colony #8834-10 Sprocket Nut & Bolt Kit Allen Head 1973-Up Harley-Davidson Big Twin/XL - Spoked Wheel - Chrome Plated
1 review $26.40

Colony #8707-6 Tappet Oil Screen/Oil Pump Check Valve/Relief Valve Plug Set 1981-Up Harley-Davidson Big Twin OEM #26263-80 - Chrome Plated
4 reviews $26.07

Colony #8763-20 Primary Cover Allen Head Screw Kit 1980-1984 Harley-Davidson Shovelhead/Evo 5 Speed - Chrome Plated
1 review $26.40

Colony #9002-4 Evo Cap Head Bolt Covers 1984-1985 Harley-Davidson FL/FX/XL - Chrome Plated
1 review $25.71

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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