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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Gasbox Tumbled Stainless Steel Points Cover for Harley-Davidson Sportsters and 1970 - 1999 Big Twins
3 reviews $21.95

Cycle Standard 1.7 inch Rise Forged Aluminum Handlebar Risers for Harley-Davidson - Chrome
10 reviews $64.97

Fast Eddy Co. No. 40 Crankcase Timken Race Remover / Installer
2 reviews $64.95

Lowbrow Customs Finned Master Cylinder Cover - 1982 - 2005 Harley-Davidson #45004-85
21 reviews $32.26

Cycle Standard 39mm Fork Boot Gaiter Set for Harley Sportster's Front Forks
32 reviews $48.08

FNA Custom Cycle Carb Arm Support Bracket for Harley-Davidson Ironheads and Shovelheads - Tumbled
$95.00

Prism Supply Co. Jockey Shifter - Long - Harley-Davidson Big Twin
4 reviews $94.99

Lowbrow Customs Belt To Chain Conversion Kit 1984-1994 Harley-Davidson Softail - Black Sprocket
$177.78

Cycle Standard Front Brake Master Cylinder Assembly - Chrome - Single Disc 1996-2017 Models (EXCEPT 15-17 Softail, 08-17 Dressers, Trike, 04-17 XL)
2 reviews $188.86 $230.05

Cycle Standard Nose Cone Cam Gear Cover - Black- 1973-92 Harley-Davidson Big Twin
$188.21

Diamond Primary Chain 1936-1986 Harley-Davidson Big Twin 4-Speed 1984-2006 FXST/FLST 1991-2005 Dyna Glide
$188.06 $208.95

Cycle Standard 35MM Chrome Fork Tubes - 25-1/4 inch - 2 Over
3 reviews $187.44

Colony #7502-2 Oversize Drain Plug & Tap Kit 1965-Up Harley-Davidson Big Twins 1967-Up Sportster - Chrome Plated
2 reviews $46.35

Lowbrow Customs Bolt On 3/4 inch Ignition Key Switch Bracket for Harley-Davidson Four Speed Transmissions - Tumbled Stainless
13 reviews $26.37

Lowbrow Customs Bolt On 13/16 inch Ignition Key Switch Bracket for Harley-Davidson 4 Speed Transmissions - Tumbled Stainless
9 reviews $26.37

Lowbrow Customs Black Solo Seat Bolt-On Spring Mounts for Harley-Davidson Swingarm Frames 1958 - 1985
5 reviews $45.76

Old-Stf Cycle Shovelhead Rocker Box Split Oil Lines - Brass
30 reviews $91.43

Drag Specialties High Performance Starter Solenoid 1965-1984 Harley-Davidson Big Twin 4 Speed 1967-1980 XL 1984-1988FXST/FLST 1985-1986 FXWG/FXSB
3 reviews $91.13

Cycle Standard Mini 1:1 ratio Mechanical Speedometer - 2.4 inch
7 reviews $60.66

Drag Specialties Billet Flange Carb Adapter - Mount Mikuni or CV carb to Harley-Davidson Evo Big Twin/Panhead/Shovelhead/Ironhead Models
13 reviews $45.46

Cycle Standard Kickstand Spring 1985-2006 Harley-Davidson Softail / 1991 & Up Touring / 1991 & Up Sportster Models - Black - OEM #50005-85A
44 reviews $9.09

Colony #9818-5 Rear Disc Brake Rotor Torx Bolt Kit 1997-Up Harley-Davidson W/Cast Wheel - Chrome Plated
18 reviews $15.13

Cycle Electric Regulator CE-540 for use on 65a 12v Harley-Davidson Generators
28 reviews $181.55 $194.34

Cycle Standard Domed Slim Chrome Screw-In Harley Style Gas Cap 1996 & up
17 reviews $30.25

Cycle Electric CE-500L Replacement Regulator for DGV-5000L Generator
6 reviews $180.23 $192.93

Cycle Standard Transmission Mounting Plate 1986-1999 Harley-Davidson Softail - Black
1 review $36.04

Fast Eddy Co. No. 55 Intake Leak Tester - 2 Bolt Style
1 review $59.95

Lowbrow Customs Domed Screw-In Gas Cap for Harley-Davidson 1996 & Later - Antique Brass
3 reviews $89.06

Timken Harley Timken Wheel Bearings - OEM #9033 & 9052 Replacement
14 reviews $22.25

Lowbrow Customs Lowbrow Customs Spark Plug Wire Set 1982-1994 Harley FXR and Gasbox Ironhead & Big Twin Top Motor Mounts
1 review $25.29

Cycle Standard Clutch Hub Retainer With Rollers 1941-1984 Harley-Davidson Big Twins - OEM #37567-41A
1 review $29.41

Lowbrow Customs Locking Tab Washer for Harley-Davidson Rear Wheel Pulley / Sprocket - Tumbled Stainless
24 reviews $12.57

Colony #2078-18 Lower Rocker Box Mounting Kit Harley-Davidson Evo Big Twin and Sportster
17 reviews $35.00

LCFabrications "The OG" Clutch Switch Pod Delete - Polished - for Harley-Davidson
8 reviews $35.00

James Gaskets Primary Cover Gasket 1965-1988 Harley-Davidson Big Twin
$24.91

Colony #2880-3 Carburetor Float Valve and Seat 1933-1965 Harley-Davidson Linkert Carburetors
$24.75

Cycle Standard Neck Post Bearing & Race Set - Imported
1 review $14.29

Cycle Standard 3-1/2 inch Forged Aluminum Handlebar Risers - Black
$85.08

Cycle Standard Single Gauge Bracket - Black - 1995-2011 Harley-Davidson XL883 1995-2005 FXD Models
2 reviews $84.99

Cycle Standard Clutch Cable OEM #38602-92 Harley Dyna 1992-2005 +4 inch Extended
2 reviews $56.37

Cycle Standard Bayonet / Cam Harley Style Vented 2.5" Gas Cap - Gloss Black
7 reviews $33.70

Drag Specialties Clutch Cable Harley-Davidson 4 Speed Big Twin 1968-86 - 50" Long
3 reviews $56.13

Gasbox S&S Carburetor Support Bracket - 1999 - 2006 Harley-Davidson Twin Cam
7 reviews $27.99

Cycle Craft #46 Pilot Jet - 1988-2006 Keihin CV Carburetor
3 reviews $5.99

Cycle Standard S&S Super E/G Carburetor Adapter for CV Air Cleaners - Chrome
2 reviews $33.53

Cycle Standard Deluxe Black Harley-Davidson Brake Light Switch - Knucklehead, Panhead, Flathead (1937-1957) OEM #72004-39
18 reviews $33.24

Colony #3252-6 Locking Exhaust Pipe Bolt Kit 1966-1984 Harley-Davidson Shovelhead - Chrome Plated
8 reviews $27.50

Performance Machine Classic 5 Spoke One-Piece Brake Rotor - 11.5 inch - Front
$164.95

Clymer Manuals 1948-1965 Harley Davidson Panhead Manual
$54.95

Cycle Standard Handlebar Clamp - Finned - Chrome
1 review $32.93

Cycle Electric Rectifying Regulator CE-204L - 1984-1988 Harley-Davidson FLST/FXST With Battery in Oil Tank
$164.51 $176.10

V-Factor Motorcycle Parts 18 Spoke Black Stainless Steel Brake Rotor - 11.5 inches - Front - Replaces Harley-Davidson OEM #44136-92/44156-00
2 reviews $81.95

Colony #8224-8 Rocker Shaft End Plug & Cap Kit 1971-Up Harley-Davidson Shovelhead 1971-1985 XL - Chrome Plated
9 reviews $40.61

EBC Brakes Sintered Rear Brake Pads 1991-98 H-D FXD/FXDL/FXDWG 84-94 FXR L87-99 FXST/FXSTB/FXSTC/FXSTS/FLST/FLSTC/FLSTF/FLSTS
2 reviews $54.14 $56.31

Lowbrow Customs Bottom Mount Headlight Bracket Harley-Davidson Springers 1936 - 1949
2 reviews $53.41

Lowbrow Customs Domed Screw-In Gas Cap for Harley-Davidson 1996 & later - Aluminum
12 reviews $53.41

Drag Specialties Vintage Style Half Moon Floorboards - Black
$160.01

LCFabrications Micro Switch Housing - Clutch Side - Double - Black - 1996-2013 Harley-Davidson
$80.00

FNA Custom Cycle Tite Seal Kit Replacement Seals
2 reviews $20.00

Fast Eddy Co. No.26 Cylinder Head Holder - 12MM/14MM Ends
$79.95

Cycle Standard Harley-Davidson Shifter Peg - Replaces OEM #34611-65
56 reviews $7.57

Cycle Standard Throttle Cable OEM #56356-96A Harley Dyna 1996-2008 +4 inch Extended
$39.63

Cycle Standard HD Factory Style Grips - Black 1 inch OEM #56206-81A
22 reviews $19.81

Dandlebars Feeler Gauges for 1930-1984 Harley-Davidsons
2 reviews $31.66

Lowbrow Customs 39mm Narrow Glide Fork Brace - For Lowbrow Narrow Trees
3 reviews $157.46

The Speed Merchant Speedpegs Foot Pegs - Black
$157.46 $174.95

Colony #8806-17 Motor Mounting Kit Upper & Lower 1970-1984 Harley-Davidson Big Twin - Chrome Plated
4 reviews $39.11

Cycle Standard Throttle Idle Cable OEM #56355-96A Harley Dyna 1996-2008 +4 inch Extended
2 reviews $39.03

Colony #3647-10 Sprocket Bolt Kit 1973-Up Harley-Davidson Big Twin & Sportster Chain Drive Models - Chrome Plated
$26.00

Colony #8141-34 Motor Case Kit Stock 1970-1978 Harley-Davidson Shovelhead - CAD Plated
$51.70

Colony #3254-6 Exhaust Pipe Locking Bolt Mounting Kit 1966-1984 Harley-Davidson Shovelheads - Zinc Plated
14 reviews $22.00

Colony #2212-1 Harley-Davidson Gas Strainer Assembly - 1/4 inch Barbed Fitting - CAD Plated
2 reviews $76.76

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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