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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Hawg Supply Swirl Points Cover For Harley Davidson Big Twin & Sportser - Polished
$59.99

Cycle Standard 41MM Chrome Fork Tubes 1984-1999 Harley-Davidson FXWG/D FXST - 34-1/4 inch - 10 Over
$222.77

Cycle Standard 41MM Chrome Fork Tubes 1984-1999 Harley-Davidson FXWG/D FXST - 30-1/4 inch - 6 Over
$208.14

Fiorucci Fabrications 1948-1999 Harley-Davidson Aluminum Head Motor Machining Fixture
$799.00

Gigacycle Garage Gigacycle Garage Seat Bolt 1/4"-28 for Pre-1997 Harley-Davidsons
$28.00

Gigacycle Garage Gigacycle Garage FXR Side Panel Screws & Seat Screw for OEM Style side panels
$131.43

Gigacycle Garage Gigacycle Garage Left Side Non-Vented Gas Cap for 1992-Up Harley-Davidsons
$107.14

Gigacycle Garage Gigacycle Garage Right Side Vented Gas Cap for 1992-Up Harley-Davidsons
$107.14

Lectron Lectron Billetron Carburetor for 100-124 Cubic Inch Harley-Davidsons
$899.00

Lectron Lectron Billetron Carburetor for 53-100 Cubic Inch Harley-Davidsons
$899.00

Airspeed Cycles Pullback T-Bar Handlebars - 8 inch Rise - 1 inch - Stainless Steel
$255.00

Airspeed Cycles Pullback T-Bar Handlebars - 6 inch Rise - 1 inch - Stainless Steel
$255.00

Lowbrow Customs Axle Plate Offset License Plate Bracket for 1936 - 1957 Harley-Davidson Big Twin Rigid Frames
$51.99

Drag Specialties Shock Top Caps - 1958-1964 Harley-Davidson FL - Chrome
$47.79

Prism Supply Co. Darlington Air Cleaner - CV Carburetor - Brushed Aluminum
$224.99

Prism Supply Co. Darlington Air Cleaner - CV Carburetor - Polished
$229.99

Prism Supply Co. Bristol Breather - Linkert Carburetor - Polished
$60.00

LePera Pillion P-Pad - Smooth for Bare Bones Solo Seats - fits 1984-1999 Harley-Davidson Softail
$180.00

LePera Bare Bones Solo Seat - Diamond - fits 1984-1999 Harley-Davidson Softail
$387.00

LePera Bare Bones Solo Seat - Smooth - fits 1984-1999 Harley-Davidson Softail
$318.00

LePera Bare Bones Solo Seat - Pleated - fits 1984-1999 Harley-Davidson Softail
$387.00

Airspeed Cycles Riserless Tracker Handlebars - 1 inch - Stainless Steel
$255.00

Belt Drives LTD. 2" Open Belt Drive Kit - Black - 1990-2006 Harley-Davidson FXST/FLST
$2,655.20 $2,794.95

Colony #3406-2 Generator Terminal Bolt Clip and Insulator Kit 1958-1969 Harley-Davidson FL/FLH 1958-65 Servi-car 1958-1981 Sportster
$11.50

Colony #3349-2 Shifter Lever Stud 1916-1936 Harley-Davidson All Models - CAD Plated
$15.73

Colony #2931-5 Linkert Carb Support Bracket 1936-1940 Harley-Davidson OHV Big Twins - Parkerized
$15.95

Colony #2923-5 Air Cleaner Mounting Screw Kit Longer Screws 1956-1965 Harley-Davidson Twins - Parkerized
$16.94

Colony #2914-2 Rocker Stud Spacer Kit 1931-1940 Harley-Davidson Big Twin - CAD Plated
$13.31

Colony #2907-2 Oil Tank Filler Cap and Gauge 1936-1940 Harley-Davidson Big Twins - Parkerized
$71.50

Colony #2905-2 Undersized Brass Intake Manifold Seals 1940-1954 Harley-Davidson OHV 1953-1956 K KH
$18.34

Colony #2901-4 Crank Pin Nut Lock Plates 1936-1940 Harley-Davidson Big Twins
$7.26

Colony #2893-3 Starter Crank Clamp Bolt 1941-1967 Harley-Davidson FL/FLH - Chrome Plated
$6.05

Colony #2891-3 Starter Crank Clamp Bolt 1941-1967 Harley-Davidson FL/FLH - Parkerized
$8.47

Colony #2597-17 Legshield Mounting Kit 1940-1942 Harley-Davidson WLA - Parkerized
$29.70

Colony #2582-3 Shifter Lever Stud Kit 1938-1946 Harley-Davidson 45s & Big Twins with Handshift - Parkerized
$16.94

Colony #9990-5 Front Axle Nut Spacer Kit Grooved 1995-1996 Harley-Davidson FXDWG - Chrome Plated
$46.35

Colony #9989-4 Front Axle Nut Spacer Kit Smooth 1994-1999 Harley-Davidson FLHR/FLHRCI - Chrome Plated
$31.87

Colony #9987-4 Rear Wheel Adjusting Screw Flat Head Allen 1991-Up Harley-Davidson Dyna Glide - Chrome Plated
$13.16

Colony #9961-12 Handlebar Clamp & Gauge Mount Kit Acorn 1995-Up Harley-Davidson FX/XL - Chrome Plated
$15.94

Colony #9843-8 Chrome Countersink Washer Set for #10 Flat Head Socket Screws Harley-Davidson - Chrome Plated
$13.94

Colony #9826-4 Smooth Front Axle Nut & Spacer Kit 1984-1996 Harley-Davidson FXST/FXSTC/FXSTB 1984-1994 FXDWG/FLT - Chrome Plated
$31.87

Colony #8911-5 Transmission Shifter Cover Cap Head Screw Kit 1987 Harley-Davidson FX/FL - Chrome Plated
$17.52

Colony #8910-5 Transmission Shifter Cover Acorn Head Screw Kit 1980-1987 Harley-Davidson FX/FL - Chrome Plated
$17.52

Colony #8908-15 Transmission Side Cover Allen Head Screw Kit 1980-1986 Harley-Davidson FX/FL - Chrome Plated
$25.72

Colony #8907-5 Transmission Shifter Cover Allen Head Screw Kit 1988-1997 Harley-Davidson FXR/FLT/Softail - Chrome Plated
$10.42

Colony #8906-5 Transmission Shifter Cover Allen Head Screw Kit 1980-1987 Harley-Davidson FX/FL - Chrome Plated
$9.31

Colony #8905-7 Transmission Shifter Cover Allen Head Screw Kit 1980-1986 Harley-Davidson Big Twin - Chrome Plated
$12.29

Colony #7113-2 Acorn Head Generator Screw Set - 1958-1969 Harley-Davidson 74's - Chrome Plated
$13.94

Colony #7110-8 Knuckle Nut Set With O-ring Seal - 1936-1947 Harley-Davidson Knucklehead - Chrome Plated
$47.80

Colony #7109-2 Crank Pin Nut - 1937-1948 Harley-Davidson 74's/80's 1936-52 61 OHV
$18.70

Colony #7103-2 Intake Manifold Nuts - 1940-1954 Overhead Valve Harley-Davidson 74's 1953-56 K/KH - Chrome Plated
$37.66

Colony #7100-13 Oil Pump Acorn Nut & Block Off Plug Set - 1936-1967 Harley-Davidson Davidson 74's - Chrome Plated
$20.31

Colony #7017-16 High Crown Acorn Cylinder Base Nut Set - 1930-1977 Harley-Davidson 74's - Chrome Plated
$21.66

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

Colony #3643-3 Shift Rod Stud 1951-E1979 Harley-Davidson FL - Chrome Plated
$11.55

Colony #3631-6 Front Stand Spring Kit 1931-1948 Harley-Davidson Big Twins - Parkerized
$11.55

Colony #3628-2 Speedo Drive Unit Retainer 1937-1952 Harley-Davidson WL - CAD Plated
$7.43

Colony #3627-2 Speedo Drive Unit Retainer 1937-1952 Harley-Davidson WL - Chrome Plated
$8.25

Colony #3622-1 Oil Pump Feed Line Nut 1938-1957 Harley-Davidson Big Twins - CAD Plated
$7.70

Colony #3460-5 Chain Tensioner Plate/Pad Mounting Kit 1965-1982 Harley-Davidson FL/FX/FXR - Parkerized
$14.85

Colony #3613-1 Horn Bracket Spring Plate 1942-1954 Harley-Davidson All Models
$8.80

Colony #3611-2 Horn Bracket Spring Plate 1936-1941 Harley-Davidson All Models
$12.10

Colony #3610-2 Horn Bracket Spring Plate 1936-1941 Harley-Davidson All Models
$14.85

Colony #3615-1 Horn Bracket Reinforcement 1936-1948 Harley-Davidson Big Twins 1940-1957 45's
$14.85

Colony #3614-2 Horn Bracket Lockwasher 1949-1954 Harley-Davidson All Models
$14.85

Colony #3604-52 Horn Mounting Kit 1931-1936 Harley-Davidson VL 1931-1939 RL
$135.00

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

Colony #8318 Stock Hardware Kit Late 1930-1936 Harley-Davidson VL - Parkerized
$302.50

Colony #8323 Stock Hardware Kit Early 1930 Harley-Davidson VL - Parkerized
$302.50

Colony #3672-10 Knurled Allen Sprocket Bolts 1985-1992 Harley-Davidson Big Twin - Chrome Plated
$20.63

Colony #3092-24 Valve Spring Cover Kit 1937-1938 Harley-Davidson Big Twin Side Valve - Chrome Plated
$231.00

Colony #3091-24 Valve Spring Cover Kit 1930-1936 Harley-Davidson VL - Chrome Plated
$231.00

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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