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 #3344-4 Shock Mount Bolt Kit 1984-1999 Harley-Davidson Softail - Chrome Plated
1 review $27.50

Colony #2702-7 Gas Tank Shut Off Rod Upper Kit 1940-1965 Harley-Davidson Big Twin/45s - Chrome Plated
$27.50

Colony #2573-4 Shock Mounting Kit 1984-1999 Harley-Davidson Softail - Chrome Plated
2 reviews $27.50

Colony #2519-2 Front Axle Smooth Covers 1991-2003 Harley-Davidson Dyna 1988-2007 Sportster - Chrome Plated
1 review $27.50

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

Cycle Standard 41mm Fork Seal Rebuild Kit - 1977-1984 Harley-Davidson FL 1980-83 FXWG FLT
$13.64

Colony #2076-10 Gas Tank Mounting Acorn Kit 1991-Up Harley-Davidson Dyna - Chrome Plated
2 reviews $27.23

Colony #8754-2-P Generator Smooth Allen Screws 1958-1969 Harley-Davidson Panhead & Shovelhead - Chrome Plated
$13.55

Cycle Standard 10 Hole Clutch Pressure Plate 1941-1984 Harley-Davidson Big Twins
1 review $13.44

Cycle Standard Screw-In Harley Stock Style Non-Vented Gas Cap - Left Side - 1996 & up - Chrome
$26.75

Cycle Standard Chrome Rear Seat Mounting Bracket
$26.64

Cycle Standard Replacement Oil Tank Cap Harley-Davidson OEM #62644-84T
7 reviews $13.22

Colony #3737-2 Air Cleaner Cover Mounting Screw Kit 1983-Up Harley-Davidson Big Twins - Zinc Plated
$13.20

Colony #3602-1 Springer Headlight Lens Gasket 1935-Up Harley-Davidson Knucklehead/Panhead/WL/Servi-car/Hummer
$13.20

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 #3045-14 Inner Primary Chain Guard Kit 1936-1954 Harley-Davidson Big Twins - Parkerized
1 review $26.08

Colony #8752-19 Transmission Side Cover 1936-1984 Harley-Davidson Big Twin - Chrome Plated
$26.06

Colony #8799-12 Primary Cover Screw Kit 1969-1969 Harley-Davidson Big Twin - Chrome Plated
$26.06

Colony #8907-5-P Transmission Shifter Cover Speedo Sensor Kit Allen 1987-Up Harley-Davidson FX/FL/Softail - Chrome Plated
$13.02

Colony #3572-5 Front Disc Brake Rotor Screw Set 2006-Up Harley-Davidson Dyna - Zinc Plated
$13.01

Colony #3329-4 Exhaust Port Nuts 1984-1999 Harley-Davidson Big Twin 1986-Up XL 1999-Up Twin Cam - Chrome Plated
$6.49

Colony #3671-5 Disc Rotor Allen Screw & Nut Kit 1979-1991 XL/FX (Cast Wheel) - Zinc Plated
$12.93

Til Death Cycles TDC Oversize Seat Mount Nut Kit
$25.82

Colony #8730-8 Rocker Shaft Chrome Plated Acorn Nut & Washer Kit 1966-1985 Harley-Davidson Shovelhead 1957-1985 Sportster - Chrome Plated
1 review $12.74

Colony #8701-2 Tappet Oil Screen Plug 1970-1980 Harley-Davidson Big Twins OEM #657 - Chrome Plated
1 review $12.74

Colony 8749-12 Transmission Top Cover Allen Screw Kit 1965-1978 Harley-Davidson Big Twin - CAD Plated
1 review $25.41

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

Cycle Standard Shift Lever - 1985-2006 Harley-Davidson Big Twin/Twin Cam - Chrome - OEM #33715-85A
1 review $25.33

Colony #9932-8 Intake Manifold to Cylinder Head Allen Kit 1995-Up Harley-Davidson Big Twins/XL
2 reviews $6.33

Colony #3167-4 Shock Mount Bolt Kit 1984-99 Harley Davidson Softail — Colony #3167-4 Shock Mount Bolt Kit 1984-1999 Harley-Davidson Softail - Zinc Plated
4 reviews $25.30

Colony #2700-1 Linkert High Speed Needle 1950-65 Harley Davidson FL — Colony #2700-1 Linkert High Speed Needle 1950-1965 Harley-Davidson FL - CAD Plated
1 review $25.30

Colony #2867-1 Rear Axle Spacer 1936-1957 Harley-Davidson Big Twins - Chrome Plated
$25.30

Colony #2506-5 Brake Shell Dowel Pin Set 1937-1972 Harley-Davidson Big Twin 1937-1952 45's
$25.30

Colony #2466-5 Oversized Brake Drum Wheel Mounting Bolt Set - 1936-1972 Harley-Davidson Knucklehead/Panhead/Shovelhead - Parkerized
2 reviews $25.30

Colony #2937-5 Stem Nut Kit with Washer/Cover Harley-Davidson Wideglide Without Steering Damper - Chrome Plated
1 review $25.29

Colony #3279-22 Exhaust System Mounting Kit 1941-1947 Harley-Davidson Knucklehead/Panhead - Parkerized
$25.08

Unity Manufacturing Clutch Retaining Washer - 1936-1984 Harley-Davidson
$12.50

Colony #3780-18 Rocker Box Flange Nut Kit 1966-1983 Harley-Davidson Shovelhead - Chrome Plated
$25.00

Colony #9817-15 Electrical Terminal Plate 1970-1974 Harley-Davidson FX/XL - Parkerized
2 reviews $25.00

Colony #7708-1 Bronze Seat Post 1936-1957 Harley-Davidson Big Twins
3 reviews $24.98

Colony #8147-13 Transmission Top Cover Screw Kit 1956-1964 Harley-Davidson Big Twins - Chrome Plated
$24.94

Colony #3356-4 Rear Fender Support Mount Screws 1984-2000 Harley-Davidson Softail 1980-1986 FXWG - Chrome Plated
1 review $12.46

Colony #3350-7 Clutch Release Stud Bushings 1936-1984 Harley-Davidson Big Twins - Parkerized
1 review $24.75

Colony #8736-24 Valve Cover Screws 1954-1965 Harley-Davidson Panhead With Steel D-Rings - Chrome Plated
$24.71

Colony #8442-19 Transmission Side Cover Clutch Arm Cap Nut Kit Harley-Davidson Big Twin 36-84 - Chrome Plated
$24.71

Colony #8755-12 Timing Cover Screw Kit 1936-1969 Harley-Davidson Big Twin - Chrome Plated
2 reviews $24.62

Colony #2084-2 Seat Post Bushings 1958-1984 Harley-Davidson Big Twins OEM #47094-58
1 review $24.37

Colony #8742-14 Oil Pump Mounting Kit 1967-1977 Harley-Davidson Big Twins - Chrome Plated
$24.37

Colony #7402-7 Acorn Head Timing Cover Screw Kit 1970-1992 Harley-Davidson Big Twins - Chrome Plated
$24.26

Colony #7411-2 Sprocket Shaft Seal Assembly Replaces 1936-1954 Harley-Davidson Big Twins
1 review $24.26

Colony #8798-12 Inner Primary Mounting Kit - 1965-1969 Harley-Davidson Shovelhead
$24.26

Colony #3282-4 Rocker Arm Cover Gasket Kit 1936-1947 Harley-Davidson Knucklehead
$12.10

Colony #2799-1 Upper Fork Bearing Adjusting Nut 1948-1984 Harley-Davidson FL 1984-2009 FXST 1991-2005 FXDWG - CAD Plated
4 reviews $12.10

Colony #2827-3 Schebler and Linkert Carburetor Float Lever Screw Kit 1916-1965 Harley-Davidson - CAD Plated
$12.10

Colony #2632-3 Circuit Breaker Adjusting Screw Kit 1947-1964 Harley-Davidson Big Twins/45's - CAD Plated
$12.10

Colony #9794-12 Timing Cover Screw Kit 1/4-20 After Market Harley-Davidson Cases - Chrome Plated
$24.20

Colony #3351-4 Rocker Arm Thrust Washer Kit 1936-1947 Harley-Davidson Knucklehead
$12.09

Colony #3461-14 Rear Fender Mounting Kit 1930-1936 Harley-Davidson VL - Parkerized
$23.98

Cycle Craft #42 Pilot Jet - 1988-2006 Keihin CV Carburetor
3 reviews $5.99

Cycle Craft #40 Pilot Jet - 1988-2006 Keihin CV Carburetor
1 review $5.99

Colony #9203-3 Clutch Lever Rod Bolt 1952-1964 Harley-Davidson Big Twin OEM #36921-52 - Chrome Plated
$11.96

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

Colony #8761-7 Timing Cover Knurled Allen Screw Kit 1970-1992 Harley-Davidson Shovelhead/Evo - Chrome Plated
2 reviews $11.90

Colony #3693-20 Rear Fender Rail Screw Kit 1972-1986 Harley-Davidson FX - Chrome Plated
1 review $23.65

Colony #3210-9 Brake Rod Clevis Pin Kit 1930 - 1969 Harley-Davidson Big Twins — Colony #3210-9 Brake Rod Clevis Pin Kit 1930-1969 Harley-Davidson Big Twins - Parkerized
1 review $11.80

Drag Specialties High-Performance Mineral Primary Oil for Big Twins - 1 quart
$11.69

Colony #9919-3 Transmission Bottom Stud Kit 1929-Up Harley-Davidson 45's
$23.18

Colony #8768-3 Front Axle Nut & Washer Kit 1973-1991 Harley-Davidson FX/XL - Chrome Plated
$11.56

Colony #2920-2 Nut & Lock Kit 1936-Up Harley-Davidson Big Twin Kickstater 1936-1979 Bg Twin 4 Speed Countershaft
5 reviews $7.70

Colony #8747-12 Oil Pump Mounting Kit 1978-1991 Harley-Davidson Shovelhead/Evo - Chrome Plated
$11.53

Colony #8931-16-P Rocker Cover Smooth Allen Kit 1985-Up Harley-Davidson FL/FX 1986-Up XL - Chrome Plated
$23.01

Colony #2280-16 Rocker Cover 12 Point Screw Kit 1985-Up Harley-Davidson FL/FX 1986-Up XL - Chrome Plated
$23.01

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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