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 #2505-1 Spark Plug Front Cable Clamp 1936-1969 Harley-Davidson 74 OHV - CAD Plated
$7.70

Colony #2384-4 Pinion & Sprocket Shaft Lock Plates 1972-1980 Harley-Davidson Big Twins 1957-1980 XL
1 review $6.05

Gasbox Chopper Bolt On Sissy Bar - 2006-2017 Dyna
16 reviews $134.95

Colony #2085-2 Seat Post Bushing Installation Tool 1958-1984 Harley-Davidson Big Twins - Parkerized
$48.73

Colony #9993-5 Front Axle Nut Smooth Spacer Kit 1997-1999 Harley-Davidson FXST/FXSTC/FXSTB/FXDWG - Chrome Plated
2 reviews $43.45

Colony #9883-20 Motor Case Flanged Hardware Kit 1996-Up Harley-Davidson Big Twin Evo - Chrome Plated
$43.45

Colony #2149-5 Rear Axle Nut/Grooved Spacer Kit 2000-2002 Harley-Davidson FLT - Chrome Plated
$43.32

Colony #9926-17 Upper & Lower Motor Mounting Allen Kit 1970-1984 Harley-Davidson Big Twin - Chrome Plated
$39.11

Colony #9884-20 Motor Case Flanged Hardware Kit 1996-Up Harley-Davidson Big Twin Evo - Zinc Plated
$39.11

Colony #2096-14 Headlamp and Horn Bracket Insulator Terminal Kit 1945-1948 Harley-Davidson Big Twin 1945-1957 Servi-car
$36.54

Colony #9929-1 Flat Top Alemite Grease Fitting Adapter Harley-Davidson OEM #0340
$92.69

Colony #2011-8 Head Bolt Set 12 Point 1985-1991 Harley-Davidson Big Twin 1986-1992 XL - Chrome Plated
2 reviews $109.99

Colony #9928-20 Motor Mounting Allen Kit 1988-2006 Harley-Davidson FLT/FLHT/FXR/FXRS - Chrome Plated
1 review $44.89

Colony #9921-56 Rear Fender Strut Mounting Allen Kit 1986-1999 Harley-Davidson FXST/FXSTC/FXSTS/Bad Boy - Chrome Plated
$79.66

Colony #9920-46 Rear Fender Strut Mounting Allen Kit 1986-1999 Harley-Davidson Softail/Fat Boy - Chrome Plated
$73.87

Colony #2020-8 Rocker Shaft End Plug 1957-1970 Harley-Davidson Big Twin - CAD Plated
$35.13

Colony #9988-4 Front Axle Nut Grooved Spacer Kit 1994-1999 Harley-Davidson FLHR/FLHRCI - Chrome Plated
$33.31

Colony #2108-12 Headlamp Bracket Mounting Kit 1955-1959 Harley-Davidson Big Twin - CAD Plated
$34.52

Colony #9974-4 Front Axle Nut Grooved Spacer Kit 1995-1999 Harley-Davidson XL/Dyna - Chrome Plated
$33.31

Colony #2002-13 Tool Box Mounting Kit 1955-1957 Harley-Davidson Big Twin - CAD Plated
$33.00

Colony #9999-3 Front Axle Nut Smooth Spacer Kit 1997-1999 Harley-Davidson FXSTS - Chrome Plated
$31.87

Colony #2054-10 Sprocket Allen Bolt /Washer Kit Cast Rear Wheels 1993-1996 Harley-Davidson Big Twins 1997-1998 Dyna/FLT - Chrome Plated
$31.87

Colony #2104-13 Transmission Top Cover Phillips Screw Kit 1950-1953 Harley-Davidson Big Twin - CAD Plated
$25.41

Colony #9959-38 Primary Cover Mounting Allen Kit 1999-Up Harley-Davidson FLT - Chrome Plated
$27.75

Colony #9917-8 Rocker Arm Heat Treated Stud Kit 1948-1965 Harley-Davidson Panhead
2 reviews $27.75

Colony #2082-5 Front Brake Shoe Pivot Stud Kit 1949-1971 Harley-Davidson FLH 1958-1972 Servi-car - CAD Plated
1 review $27.07

Colony #2074-6 Tappet Oil Screen/Pump Check Valve/Relief Valve Set 1981-Up Harley-Davidson Big Twin - Chrome Plated
2 reviews $26.07

Colony #2103-13 Transmission Top Cover Phillips Screw Kit 1950-1953 Harley-Davidson Big Twin - Chrome Plated
$27.83

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

Colony #9983-3 Shifter Cam Plunger Kit 1936-1976 Harley-Davidson Big Twin 1940-1973 45s - Parkerized
$21.73

Colony #2069-5 Rear Axle Adjuster Kit 1930-1936 Harley-Davidson 74/80 Twins - CAD Plated
4 reviews $20.99

Colony #2015-6 Oversize Panhead Valve Cover Screws 1948-1965 Harley-Davidson Panhead W/Steel D Rings - Chrome Plated
$21.73

Colony #2014-6 Oversize Panhead Valve Cover Screws 1948-1965 Harley-Davidson Panhead W/Alloy D Rings - Chrome Plated
1 review $21.73

Colony #9911-1 Fork Tube Cap 1960-1977 Harley-Davidson - Chrome Plated
$20.65

Colony #9944-24 Rocker Box Mounting Allen Kit 1999-Up Twin Cam Dyna/FLT 2000-Up Softail - Chrome Plated
2 reviews $19.36

Colony #9918-8 Rocker Arm Stud Nut Kit 1948-1965 Harley-Davidson Panhead - CAD Plated
2 reviews $19.12

Colony #2125-12 Floorboard Hinge Bolt Kit 1982-Up Harley-Davidson FL - Chrome Plated
1 review $19.36

Colony #9873-16 Inner Primary Mounting Kit 1994-1999 Harley-Davidson Softail 1994-1998 Dyna Glide - CAD Plated
1 review $24.00

Colony #2048-4 Footpeg Mounting Low Head Allen Bolt/Nut Kit 1969-Up Harley-Davidson FL/FX/XL - Chrome Plated
2 reviews $17.22

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 #2086-1 Seat Post Bushing Installation Tool 1936-1957 Harley-Davidson Big Twins - Parkerized
4 reviews $19.80

Colony #2126-12 Generator Brush Positive Terminal Screws/Fittings 1932-1957 Harley-Davidson All Models
$18.15

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 #9946-20 Cam Cover Mounting Allen Kit 1999-Up Twin Cam Dyna/FLT 2000-Up Softail - Chrome Plated
1 review $14.89

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

Colony #2131-4 Handlebar Riser Allen Bolt Kit 1/2-13 x 3-3/4" - Chrome Plated
$14.89

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

Colony #9897-6 Grease Fitting Zerk Type 1936-1984 Harley-Davidson - Chrome Plated
2 reviews $14.34

Colony #9874-2 Oil Screen Plug 1966-1969 Harley-Davidson Big Twins - 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 #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 #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 #9875-2 Oil Screen Plug 1966-1969 Harley-Davidson Big Twins - CAD 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 #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 #9905-16 Floorboard Stud Mounting Kit 1936-1957 Harley-Davidson Big Twins - Parkerized
$13.75

Colony #9877-2 Oil Screen Plug 1970-1980 Harley-Davidson Big Twins - CAD Plated
$7.96

Colony #9954-5 Point Cover Mounting Button Torx Kit 1999-Up Harley-Davidson Twin Cam Dyna/FLT 2000-Up Softail - Chrome Plated
2 reviews $7.17

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

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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