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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Cycle Standard Tail Light Assembly for 1973-1999 Harley-Davidsons - Replaces OEM #68008-73A
13 reviews $60.89

#2233-12 Rocker Arm Shaft Washer O-Ring Kit Harley Shovelhead 66-84 — Colony #2233-12 Rocker Arm Shaft Washer O-Ring Kit 1966-1984 Harley-Davidson Shovelhead 1957-1984 XL
23 reviews $6.05

The Rough Trade 2" Wrench for Harley-Davidson Small Port Knucklehead & Big Twin Flathead Intake
1 review $20.00

Colony #8155-30 Primary Cover Screw Kit 1936-1964 Harley-Davidson Big Twins - Chrome Plated
3 reviews $30.00

Hawg Supply No Mess Oil Drain Valve For Harley-Davidson 5/8-18 thread
1 review $59.99

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

Colony #9213-4 Upper Inner Pushrod Covers 1979-Up Harley-Davidson Shovelhead 1984-Up Evo 1986-1990 XL
1 review $39.11

Lowbrow Customs Finned Master Cylinder Cover - 1982 - 2005 Harley-Davidson #45004-85
20 reviews $29.33

Cycle Standard Kickstand Spring 19366 -1987 Harley-Davidson Big Twins / Pre 1984 Ironhead Sportster Models - Black - OEM #50011-30TA
7 reviews $9.00

Lowbrow Customs FiltroMax Big Twin Bracket - Polished
10 reviews $29.18

Cycle Standard Bungee Nuts - 3/8-16 OEM #98185-90T
8 reviews $11.41

Cycle Craft #180 Main Jet - 1988-2006 Keihin CV Carburetor
1 review $5.99

Lowbrow Customs Chrome Solo Seat Bolt-On Spring Mounts for Harley-Davidson Swingarm Frames 1958 - 1985
1 review $37.83

Cycle Standard Headlight Visor - 5-3/4" Headlight - Black - Replaces OEM #69735-05
2 reviews $37.64

Cycle Standard Headlight Visor - 5-3/4" Headlight - Chrome - Replaces OEM #69735-05
$37.64

Motone Screw-In Billet Adapter for 2.5" Monza Gas Cap for 1996 & later Harley-Davidson
3 reviews $56.08 $69.64

Gasbox CV Carburetor Support Bracket - 1999 - 2006 Harley-Davidson Twin Cam
8 reviews $27.99

Cycle Standard 1/4-20 inch Fender Seat Mount Nut Kit - Zinc Plated
2 reviews $11.12

James Gaskets Fork Seal Rebuild Kit 1977-1983 Harley-Davidson FL FLH FLH-80 FLT-80 FLT Classic
2 reviews $22.20

Colony #8005-12 Electrical Terminal Box Assembly1948-1969 Harley-Davidson Big Twins & 45's
2 reviews $55.04

Colony #7505-4 Aluminum Alloy Tubular Pushrods 1941-1947 Harley-Davidson 74 Knucklehead
$55.00

Colony #7122-4 Aluminum Alloy Tubular Pushrods - 1948-1952 Harley-Davidson 74's
$55.00

Hawg Supply Honeycomb Kicker Pedal
$109.99

Koyo Bearings Neck Post Bearing & Race Set Made in Japan
$21.95

Fast Eddy Co. No. 4 Cam Gauge Pins .105" 1989 & earlier Harley Big Twins
1 review $21.95

Lowbrow Customs Air Cleaner Backplate Gasket for Super E / G Carburetor
45 reviews $2.02

Cycle Standard Oil Filter for Harley-Davidson XL FXR Softail Touring Models and Buell - Chrome - OEM #63805-80A 63796-77A
8 reviews $13.62

Cycle Standard Chrome 6V Coil 1947 & Up Harley-Davidson
1 review $54.37

James Gaskets Cam Change Gasket Kit with Metal Cam Cover Gasket - 1970-92 Harley-Davidson Big Twin
1 review $36.14

Samwel Supplies Reproduction Bearing Adjuster Nuts for Springer Forks - Parkerized
8 reviews $54.19

Colony #7608-6 Rear Rocker Stud Assembly 1930-1948 Harley-Davidson Big Twin Springers
1 review $53.96

Cycle Standard Screw-In Harley Stock Style Non-Vented Gas Cap - Left Side - 1982-1995 - Chrome
$26.75

Cycle Standard Throttle Idle Cable OEM #56355-96A Harley Dyna 1996-2008 +4 inch Extended
1 review $35.48

Cycle Standard Rocker Box D-rings - Polished - 1948-65 Harley-Davidson Panhead
$106.42

Lowbrow Customs Spare Parts Book for 1958-1968 Harley-Davidson Panhead Shovelhead
15 reviews $35.30

Colony #8449-22 Rocker Box and Rocker Shaft Cap Nut Kit 1966-1983 Harley-Davidson Shovelhead - Chrome Plated
2 reviews $52.87

Colony #2313-19 Upper and Lower Motor Mount Bolt Kit 1936-1969 Harley-Davidson Big Twin - Parkerized
2 reviews $52.45

Colony #9627-19 Upper & Lower Motor Mount Kit 1936-1969 Harley-Davidson Big Twin - Parkerized
3 reviews $52.45

Cycle Standard Rear Fender Strut Set - 1977-1984 Harley-Davidson FLH
$104.29

Colony #2370-8 Cylinder Head Motor Brace Mounting Kit 1966-1984 Harley-Davidson Shovelhead - CAD Plated
2 reviews $20.85

Colony #2137-4 Handlebar Riser Hex Bolt Kit 1/2-13 x 3" - Chrome Plated
5 reviews $14.89

Saddlemen 1/4 inch -20 Seat Mount Knob - Black
6 reviews $8.00

Colony #3255-8 Tappet Screw & Nut Kit 1936-1952 Harley-Davdison Big Twins
$34.65

Colony #3744-1 Stem Crown Nut Kit 1936-1948 Harley-Davidson Big Twin Springer
$51.70

Colony #7808-4 Upper Pushrod Covers (Inner) 1957-1985 Harley-Davidson Sportster 1936-Early 1979 OHV Big Twins
3 reviews $34.05

Colony #8603-8 Adjustable Pushrod & Solid Lifter Kit 1984-Up Harley-Davidson Evo
2 reviews $102.11

Colony #8153-2 Generator Mounting Screws 1958-1969 Harley-Davidson Big Twins - Chrome Plated
2 reviews $12.74

Colony #2601-2 Brake Caliper Bleed Screws 1983-2004 Harley-Davidson Big Twin 1983-2003 XL - Zinc Plated
6 reviews $8.47

Lowbrow Customs Premium Stainless Steel Exhaust Clamps 1948-1965 Harley-Davidson Panhead
$25.16

Colony #8608-36 Rocker Box Nut Kit 1966-1983 Harley-Davidson Shovelhead - Chrome Plated
2 reviews $20.11

Colony #3667-19 Primary Cover Screw Kit 1989-2006 Harley-Davidson Softail 1991-2005 Dyna - CAD Plated
3 reviews $25.08

Cycle Standard High-Flow Washable Air Filter Element for 1990-1999 Harley 80 inch Evo #29330-96
$25.07

Colony #9708-18 Rear Fender Mounting Kit 1936-1957 Harley-Davidson Big Twin - Chrome Plated
1 review $50.08

Unity Manufacturing Clutch Lockup Tool - 1990-1997 Harley-Davidson Big Twin 1991-2022 XL
$50.00

The Rough Trade 2-1/8" Wrench for Harley-Davidson Large Port Knucklehead & Panhead Intake
$20.00

Colony #3711-4 Rocker Arm Spacer Kit 1966-1984 Harley-Davidson FL 1971-1984 FX
$20.00

Unity Manufacturing Four Speed Transmission Mainshaft Nut Wrench Adapter
$25.00

Unity Manufacturing Four Speed Clutch Lockup Tool - BDL/Pro-Clutch
3 reviews $50.00

Colony #8860-8 Cylinder Base Stud Spacer 1978-1984 Harley-Davidson Shovelhead OEM #16836-78 - Chrome Plated
1 review $24.98

Gasbox Exhaust Clamp 4 Piece Set 1947 - 1957 Harley-Davidson Panhead - Parkerized OEM #47-57 CL HDW
$49.95

James Gaskets Exhaust Port Gasket Kit - Thin Graphite Wire Gaskets & Hex Nuts - 1984-Up Harley-Davidson Evo/Twin Cam 1986-2022 XL
$24.95

S&S Cycle Ignition Rotor - 1970-99 Harley-Davidson Big Twins
$19.95

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

Colony #2577-1 Boot Guard 1936-Up Harley-Davidson Knucklehead/Flathead - Chrome Plated
$99.00

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

Cycle Standard Throttle Cable OEM #56356-92 Harley Dyna 1992-1995 - Blacked Out
2 reviews $16.45 $23.50

Cycle Standard 3 Hole Chrome Derby Cover for 1970-1998 Harley-Davidson Big Twins Replaces OEM #60668-84A 253952-84T
3 reviews $24.66

Cycle Standard Oil Temperature Dipstick OEM #62896-00 Harley-Davidson 2000 & Up Softail
19 reviews $32.85

Colony #2763-5 Intake Manifold Nipple Installation Tool 1940-1954 Harley-Davidson OHV 74's 1953-1956 K/KH - Parkerized
$97.90

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

Lowbrow Customs Dished Screw-In Gas Cap for Harley-Davidson 1996 & later - Aluminum
4 reviews $48.55

Lowbrow Customs Domed Screw-In Gas Cap for Harley-Davidson 1996 & later - Aluminum
12 reviews $48.55

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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