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 #9506-4 Rear Chain Adjusters - 1932-1973 Harley-Davidson Servi-car - Parkerized
$21.90

#3095-1 Transmission Adjuster Screw Support Strap Chrome Harley Big Twins 1936-57 — Colony #3095-1 Transmission Adjuster Screw Support Strap 1936-1957 Harley-Davidson Big Twins - Chrome Plated
$21.78

#3087-1 Foot Shifter Lever Bushing Harley Big Twins 1952-69 — Colony #3087-1 Foot Shifter Lever Bushing 1952-1969 Harley-Davidson Big Twins
$21.78

Colony #2650-13 Top Motor Mount Hardware 1957-E1972 Harley-Davidson XL 1952-1972 Big Twin - Parkerized
1 review $21.78

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

Colony #9634-4 Oil Pump Check & Relief Valve Plugs 1981-Up Harley-Davidson FL/FX - Chrome Plated
1 review $21.73

Colony #3307-4 Intake and Exhaust Rocker Arm Cover Return Oil Line Nuts 1938-1947 Harley-Davidson Knucklehead
$21.56

Colony #7604-7 Upper Motor Mount Kit Acorns Nut 1936-1984 Harley-Davidson OHV Big Twins - Chrome Plated
4 reviews $21.52

Colony #3754-1 Circuit Breaker Base Retainer 1936-1964 Harley-Davidson All Models
$21.45

Cycle Standard Tail Light Screws for 1973-Up Harley-Davidsons - Replaces OEM #68026-73
4 reviews $21.14

Colony #9630-2 Front Brake Cable Adjusting Screw 1941-1948 Harley-Davidson Big Twin 1941-1957 45 Servicar - Parkerized
$21.12

Colony #2628-4 Front Brake Cable Handlebar Clip 1928-1948 Harley-Davidson Big Twins 1932-1957 Servi-cars - Parkerized
$21.00

Colony #3718-4 Fuel Tank Rubber Grommet Kit 2000-2017 Harley-Davidson Softails
$20.90

Colony #3621-4 Brake Light Switch Mounting Kit 1939-1957 Harley-Davidson Big Twins - Chrome Plated
$10.45

Colony #8439-13 Oil Pump Cap Nut / Block Off Plug Chrome Cap Nut Set Harley 1936-67
$20.70

Colony #8804-2 Transmission Fill Plug Dipstick 1985-1986 Harley-Davidson Evo 5 Speed - Gold Plated
$20.70

Colony #9986-8 Custom Lower Shock Mount Bolt/Nut Kit 1991-2001 Harley-Davidson Dyna - Chrome Plated
$20.70

Colony #9867-18 Transmission Mounting Kit 1986-Up Harley-Davidson FXST - Zinc Plated
$20.70

Colony #3673-10 Allen Sprocket Bolts 1973-Up Harley-Davidson Big Twins/XL - Chrome Plated
$20.63

Cycle Standard Ignition Advance Unit Circuit Breaker Base Assembly 1970-Up Harley-Davidson OEM# 32577-70
$20.58

Colony #2004-6 Tool Box Mounting Kit Late 1962-1964 Harley-Davidson Big Twin - CAD Plated
$20.57

Colony #3215-4 Throttle Cable Bracket 1949 - 1953 Harley-Davidson Big Twins — Colony #3215-4 Throttle Cable Bracket 1949-1953 Harley-Davidson Big Twins - Parkerized
$20.57

Colony #2980-11 Fender to Brace Rivets and Tool 1930-1979 Harley-Davidson All Models
2 reviews $20.57

Colony #3652-3 Primary Inspection Cover Kit 1929-1952 Harley-Davidson 45's 1932-1973 Servi-car 1930-1936 VL - Parkerized
$20.35

Colony #9102-8 Cylinder Base Nut Set 1978-1984 Harley-Davidson Shovelhead OEM #16838-78 - Black Oxide
2 reviews $20.35

Colony #8743-14 Oil Pump Mounting Kit 1967-1977 Harley-Davidson Big Twin - CAD Plated
$20.31

Colony #8409-4 Rear Brake Cross Shaft Nut & Lock Kit 1930-1957 Harley-Davidson Big Twin - Chrome Plated
$20.31

Colony #7705-4 Knucklehead Rocker Box Drain Tube Fitting Kit
$20.31

Colony #9937-20-P Front Motor Mount Kit Smooth Chrome Allen Harley Dyna 91-up — Colony #9937-20-P Front Motor Mount Smooth Allen Kit 1991-Up Harley-Davidson Dyna - Chrome Plated
1 review $20.27

Colony #7349-3 Rocker Box Oil Line Fittings 1942-1947 Harley-Davidson Knucklehead - Chrome Plated
1 review $20.27

Colony #9306-7 Timing Cover Screw Kit 1970-1980 Harley-Davidson Shovelhead - CAD Plated
$10.04

Colony #8796-4-P Handlebar Clamp Smooth Allen Screw Kit 1982-Up Harley-Davidson FX/XL - Chrome Plated
$10.04

Cycle Standard Damper Fork Tube Screw & Washer Kit 1979-Up Harley-Davidson Sportster XL 1975-1986 FX 1982-1994 FXR 1991-2017 FXD 1986-2005 FLST 1977-1984 FL 1984-2005 FXST OEM# 45405-75A
$10.00

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

Colony #3807-12 Inner Primary Cover Mounting Stud Kit 1970-1979 Harley-Davidson FL/FLH/FX
$19.80

Colony #3380-6 Fork Panel Mounting Kit 1949-1970 Harley-Davidson Big Twins 1952-1970 K/XL - Chrome Plated
$19.80

Colony #3566-1 Front Wheel Hub Plate 1991-1999 Harley-Davidson XL 1984-1999 FXR/FXD - Black
2 reviews $19.80

Colony #2320-1 Transmission Mainshaft Lock Nut 1992-Up Harley-Davidson Big Twin/Sportsters
$19.80

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

Colony #9613-13 Transmission Top Cover Screw Kit 1936-1955 Harley-Davidson Big Twin - CAD Plated
$19.71

Colony #3496-10 Manifold Inlet Nipples 1948-1954 Harley-Davidson OHV
$19.53

Colony #3403-8 Cylinder Base Stud Spacers 1978-1984 Harley-Davidson Shovelheads - Zinc Plated
1 review $19.51

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

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

Colony #2522-6-P Rear Fender Rail Mounting Smooth Allen Screw Kit 1973-1984 Harley-Davidson FX - Chrome Plated
$19.48

Colony #2369-8 Cylinder Head Motor Brace Mounting Kit 1948-1965 Harley-Davidson Panhead - CAD Plated
6 reviews $19.48

Colony #2872-1 Rear Axle Spacer 1958-1966 Harley-Davidson FL/FLH - Parkerized
$19.36

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

Colony #9910-4 Fork Slider Drain Screws 1973-Up Harley-Davidson XL/FXR - Chrome Plated
5 reviews $4.84

Colony #9664-8 Linkert Carb Mounting Screws Harley-Davidson OEM #27424-48 - Parkerized
4 reviews $9.56

Colony #9502-1 Timing & Oil Tank Plug 1938-1951 Harley-Davidson All Models OEM #2326-38 - Chrome Plated
$9.56

Colony #8154-2 Generator Mounting Screws 1958-1969 Harley-Davidson Big Twins - CAD Plated
2 reviews $9.56

Colony #2958-4 Hand Brake Lever Screw Kit 1928-1940 Harley-Davidson - Parkerized
$18.88

Colony #9891-18 Gas Tank Mounting Kit 1937-1975 Harley-Davidson Big Twin 1972-1972 FX - Chrome Plated
3 reviews $18.88

Colony #3553-3 Rear Axle Mount Kit 1989-Up Harley-Davidson Big Twins & XL - Chrome Plated
3 reviews $9.38

Colony #3606-15 Horn Mounting Kit 1942-1945 Harley-Davidson All Models
$18.70

Colony #8494-1 1937-1986 Harley-Davidson Big Twin Transmission & Sportster XL Motor Case Drain Plug OEM #707 - Chrome Plated
1 review $9.16

Colony #3451-4 Lower Shock Mounting Kit 1973-1984 Harley-Davidson FLH 1973-1986 FX - Zinc Plated
$9.08

Colony #3696-4 Exhaust Port Nuts 1984-1999 Harley-Davidson Big Twin 1986-Up XL 1999-Up Twin Cam - Chrome Plated
1 review $6.05

Colony #3540-1 Circuit Breaker Timer Wire Cable Clip 1941-1948 Harley-Davidson Big Twins - Parkerized
$6.05

Colony #3293-9 Rear Chain Guard Mounting Kit 1963-1982 Harley-Davidson FL/FLH - Chrome Plated
$18.15

Colony #3296-16 Spotlight Mounting Kit 1949-1978 Harley-Davidson Big Twins - Chrome Plated
$18.15

#3096-1 Transmission Adjuster Screw Support Strap CAD Harley Big Twins 1936-57 — Colony #3096-1 Transmission Adjuster Screw Support Strap 1936-1957 Harley-Davidson Big Twins - CAD Plated
1 review $18.15

Colony #2643-2 Low Speed Needle Valve Lever Spring Collar 1927-1965 Linkert Carburetor
2 reviews $6.05

Colony #9308-17 Primary Cover Screw Kit 1970-1980 Harley-Davidson Shovelhead - CAD Plated
$17.99

Colony #7820-4 Rear Brake Cross Shaft Nut & Lock Kit 1930-1957 Harley-Davidson Big Twins - CAD Plated
$17.92

Colony #9620-13 Transmission Top Cover Screw Kit 1936-1955 Harley-Davidson Big Twin - Parkerized
1 review $17.88

Colony #3005-2 Transmission Mainshaft Locknut 1915-1935 Harley-Davidson Big Twins
$17.60

Colony #9732-7 Foot Brake Lever & Bracket Mounting Kit CAD Harley-Davidson 1936-71 - Chrome Plated
$8.78

Colony #8483-2 Dash Center Screw Kit 1947-1967 Harley-Davidson - Chrome Plated
1 review $8.78

Colony #3297-18 Spotlight Mounting Kit 1979-1984 Harley-Davidson FL/FLH - Zinc Plated
$17.55

Colony #3122-4 Carburetor Bowl Locknut Brass1930-65 Harley Davidson Big Twins — Colony #3122-4 Carburetor Bowl Locknut 1930-1965 Harley-Davidson Big Twins - Brass
1 review $17.55

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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