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 #9734-7 Foot Brake Lever & Bracket Mounting Kit 1936-1971 Harley-Davidson Big Twin - Parkerized
2 reviews $6.38

Colony #9733-7 Foot Brake Lever & Bracket Mounting Kit CAD Harley-Davidson 1936-71 - CAD Plated
2 reviews $6.38

Colony #9784-4 Headlight Visor Mounting Hex Bolt Kit 1959-Up Harley-Davidson XL/FX/FXR - Chrome Plated
$5.58

Colony #9717-1 Starter Crank Pin Stud 1936-Up Harley-Davidson Big Twin - Parkerized
$5.18

Colony #9674-1 Long Oil Pump Nut Pre-1967 Harley-Davidson All Models - Parkerized
$5.18

Colony #9821-4 Oil Filter Adaptor Mounting Allen Kit 1992-Up Harley-Davidson Big Twin - Chrome Plated
1 review $4.76

Colony #9731-3 Gas Strainer Rebuild Kit 1939-1941 Harley-Davidson Twins
$4.76

Colony #8219-20 Head Bolt Kit 1936-1939 Harley-Davidson Knucklehead - Chrome Plated
1 review $76.76

Colony #8218-36 Head Bolt Kit 1940-Up Harley-Davidson 1930-1947 Flathead 74 & 80 Iron Heads - Chrome Plated
$123.48

Colony #8136-34 Motor Case Kit Acorn Head 1965-1969 Harley-Davidson Big Twin - Chrome Plated
1 review $63.61

Colony #8139-34 Motor Case Kit Acorn Head 1970-1978 Harley-Davidson Shovelhead - Chrome Plated
$63.61

Colony #8129-34 Motor Case Kit Stock 1936-1939 Harley-Davidson Knucklehead - CAD Plated
1 review $51.70

Colony #8144-34 Motor Case Kit Stock 1979-1995 Harley-Davidson Shovelhead/Evo - CAD Plated
$51.70

Colony #8141-34 Motor Case Kit Stock 1970-1978 Harley-Davidson Shovelhead - CAD Plated
$51.70

Colony #8132-34 Motor Case Kit Stock 1940-1947 Harley-Davidson Knucklehead - CAD Plated
$51.70

Colony #8231-26 Transmission Mounting Kit 1936-1964 Harley-Davidson Big Twin - Chrome Plated
1 review $56.18

Colony #8232-26 Transmission Mounting Kit 1936-1964 Harley-Davidson Big Twin - CAD Plated
1 review $49.41

Colony #8734-24 Valve Cover Screws 45/64 inch Long 1954-1965 Harley-Davidson Panhead With Steel D-Rings - Chrome Plated
$41.97

Colony #8732-24 Valve Cover Screws 1-1/4 inch Long 1954-1965 Harley-Davidson Panhead With Alloy D-Rings - Chrome Plated
1 review $41.97

Colony #8140-34 Motor Case Kit Stock 1970-1978 Harley-Davidson Shovelhead - Chrome Plated
2 reviews $58.30

Colony #8137-34 Motor Case Kit Stock 1965-1969 Harley-Davidson Big Twin - Chrome Plated
2 reviews $58.30

Colony #8134-34 Motor Case Kit Stock 1948-1964 Harley-Davidson Panhead - Chrome Plated
3 reviews $58.30

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

Colony #8222-8 Rocker Shaft End Plug & Cap Kit 1966-1970 Harley-Davidson Shovelhead 1957-1970 XL - Chrome Plated
2 reviews $40.61

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 #8848-6 Circuit Breaker Post Rebuild Kit 1930-1948 Harley-Davidson All Models
$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 #8409-4 Rear Brake Cross Shaft Nut & Lock Kit 1930-1957 Harley-Davidson Big Twin - Chrome Plated
$20.31

Colony #8861-8 Cylinder Base Stud Spacer 1978-1984 Harey-Davidson Shovelhead - Black
1 review $19.51

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

Colony #8791-10 Disc Rear Rotor to Hub Screw Kit 1979-1991 Harley-Davidson FX/XL 1981-1984 FL - Chrome Plated
2 reviews $17.88

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 #8760-16 Lifter Base Allen Screw Kit 1936-1976 Harley-Davidson Big Twin - Chrome Plated
$17.92

Colony #8901-4 Carburetor Bowl Lock Nut 1930-1965 Harley-Davidson OEM #27375-29 - Chrome Plated
$19.80

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 #8794-10 Disc Front Brake Rotor to Hub Torx Screw Kit 1984-Up Harley-Davidson FXST/FXWG - Chrome Plated
$20.27

Colony #8727-8 Lifter Base Allen Screw Kit Pre-1976 Harley-Davidson Case To Late Lifter Bases - Chrome Plated
$15.52

Colony #8700-2 Oil Pump Relief Valve Plug 1968-1980 Harley-Davidson Big Twins OEM #26377-68 - Chrome Plated
$15.52

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

Colony #8929-8 Linkert Carb Mounting Screws Harley-Davidson OEM #47248-48 - Chrome Plated
$14.74

Colony #8773-12 Footboard Hinge Bolt Kit 1941-1981 Harley-Davidson OEM #2954-14 - CAD Plated
2 reviews $14.89

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

Colony #8942-14 Frame Electrical Terminal Screws & Fittings 1936-1947 Harley-Davidson Big Twins 45's - CAD Plated
$14.52

Colony #8485-1 Stem Nut Reproduction 1936-1948 Harley-Davidson Big Twin Springers - CAD Plated
$13.94

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 #9005-4 Throttle Cable Bracket 1936-1948 Harley-Davidson OHV Big Twin - Parkerized
2 reviews $17.60

Colony #8744-12 Oil Pump Mounting Kit 1978-1991 Harley-Davidson Big Twin - Chrome Plated
1 review $13.40

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

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 #8609-36 Rocker Box Nut Kit 1966-1983 Harley-Davidson Shovelhead - CAD Plated
$12.67

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

Colony #8772-2 Timing Cover Oil Passage Bolt 1963-1969 Harley-Davidson Big Twin OEM #25218-63 - CAD Plated
$11.96

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 #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 #8488-10 Cylinder Head Bolt Washers 1948-Up Harley-Davidson OEM #6469 - 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 #8795-4 Handlebar Clamp Allen Screw Kit 1974-1984 Harley-Davidson FX/XL L1977-1984 FL - Chrome Plated
1 review $9.31

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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