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 #3756-3 Carburetor Choke Screw/Air Intake Shaft Stop Ball & Spring 1933-1965 Harley-Davidson
$11.00

James Gaskets Primary Cover Gasket 1983-1993 Harley-Davidson Softail & Dyna Models
$36.23

Drag Specialties Primary Chain Adjuster Shoe 1965-1999 Harley-Davidson Big Twin 1999-2000 Twin Cam
$16.43

Bare Knuckle Performance Antihero Stainless Steel Front Brake Rotor - 11.5 inches Pre-1999 Harley-Davidson Models No Speedo Drive
$249.00

Bare Knuckle Performance Overbearing - For Use With All OEM Clutch and Drive Components
$149.00

Bare Knuckle Performance Overbearing 2.0 - For Use With Aftermarket Clutch and Drive Components
$149.00

Bare Knuckle Performance 39mm Narrow Glide "The Clinch" Fork Brace - Gloss Black
$299.00

Bare Knuckle Performance 39mm Narrow Glide "The Clinch" Fork Brace - Raw
$274.00

Gasbox Full Rigid Chopper Frame 1936-1999 Harley-Davidson Big Twin 5 Speed - 3" Up - Sporty Tank Mounts - Horseshoe Oil Tank
$1,799.00

Gasbox Full Rigid Frame 1936-1999 Harley-Davidson Big Twin 4 Speed - Frisco Tank Mounts - Horseshoe Oil Tank
1 review $1,799.00

Gasbox Full Rigid Chopper Frame 1936-1999 Harley-Davidson Big Twin 4 Speed - 3" Up - Sporty Tank Mounts - Horseshoe Oil Tank
$1,799.00

Drag Specialties AGM Maintenance Free Battery 1997-2003 Harley-Davidson XL 91-99 FXST/FLST 91-98 FXD/FXDWG 00-23 Softail 99-17 FXD/FXDWG/FLD
$190.99

Cycle Electric LeBeef Generator DGV-5000-LH-CP 12 Volt Low Voltage - 1936-1964 Harley-Davidsons w/Heli Coils
$643.16 $688.48

Cannonball Kicker Clutch/Housing Puller for Cannonball StealthStarter Kick Drive Systems
$38.56

Airspeed Cycles T-Bar Handlebars - 10 inch Rise - 1 inch - Stainless Steel
$235.00

Airspeed Cycles T-Bar Handlebars - 8 inch Rise - 1 inch - Stainless Steel
$235.00

Cycle Standard Inner Shift Lever 1982-Up Harley-Davidson FL Models - Black - OEM# 33718-82B
$23.61

Cycle Standard Inner Shift Lever 1982-Up Harley-Davidson FL Models - Chrome - OEM# 33718-82B
$23.61

Lowbrow Customs Lowbrow Customs Spark Plug Wire Set 1982-1994 Harley-Davidson FXR
$22.99

Lowbrow Customs Lowbrow Customs Spark Plug Wire Set 2004-2006 Harley-Davidson XL 1999-2008 FLH/FLT
$18.39 $22.99

Lowbrow Customs Lowbrow Customs Spark Plug Wire Set 2007-2021 Harley-Davidson XL 1999-2006 FLH/FLT
$22.99

Diamond Primary Chain 1936-1986 Harley-Davidson Big Twin 4-Speed 1984-2006 FXST/FLST 1991-2005 Dyna Glide
$182.66 $202.95

DP Brakes Full Clutch Plate Kit 1998-1999 Harley-Davidson Evo Big Twin 1999-2017 Twin Cam
$304.95

The Rough Trade Passenger Peg Mounts For Harley-Davidson Duo-Glides
$25.00

The Rough Trade 1-3/8" Wrench for Top Fork Nut Harley-Davidson Hydra Glide/Big Twin Large Axle Nut
$20.00

The Rough Trade Axle Wrench for Harley-Davidson Big Twin
$20.00

V-Twin Manufacturing Spring Fork Shock 1997-2006 Harley-Davidson FLSTS 2005-Up FLSTSC - Black
$75.58 $100.77

Drag Specialties Rear Drive Belt - 130 Tooth - 1-1/2 inch Width - 1991-2000 Harley-Davidson Dyna
$272.43

Drag Specialties Rear Drive Belt - 130 Tooth - 1-1/2 inch Width - 1994-1999 Harley-Davidson Softail
$272.43

Cycle Electric LeBeef CE-500-CP Replacement Regulator for DGV-5000 Generator
$274.66 $294.02

Cycle Electric LeBeef CE-540-CP Regulator for use on 65a 12v Harley-Davidson Generators
$271.80 $290.96

Hawg Supply Honeycomb Kicker Pedal
$109.99

Cycle Standard Clutch Cable OEM# 38606-87A 1987-1994 Harley-Davidson FXR +8 inch Extended
$66.77

Cycle Standard Clutch Cable OEM# 38606-87A 1987-1994 Harley-Davidson FXR +4 inch Extended
$64.07

Cycle Standard Clutch Cable OEM# 38606-87A 1987-1994 Harley-Davidson FXR
$59.58

Cycle Standard Clutch Cable OEM# 38618-52 1952-1967 Harley-Davidson FL/EL +4 inch Extended
$27.09

Drag Specialties Clutch Cable OEM 38606-87A Harley-Davidson FXST 1987-1999 +6 inch Extended
$76.17

Drag Specialties Clutch Cable OEM 38606-87A Harley-Davidson FXST 1987-1999
$71.02

Drag Specialties Clutch Cable OEM 38599-83A Harley-Davidson 5 Speed Big Twin 1980-1986 +6 inch Extended
1 review $61.75

Drag Specialties Clutch Cable OEM 38599-83A Harley-Davidson 5 Speed Big Twin 1980-1986
$54.54

V-Factor Motorcycle Parts MCM Slash Cut Drag Pipes 1971-1984 Harley-Davidson FX 1981-1982 FXWG - Black
$159.99

Fast Eddy Co. No. 42 Starter Clutch/Kicker Gear Puller
$249.95

Colony #3764-1 Foot Clutch Friction Spring Washer Disc 1936-1940 Harley-Davidson Big Twin 1938-1952 45 Solo 1938-1946 Servi-car - Parkerized
$14.30

Colony #3759-3 Carbuetor Mounting Bracket 1966 Harley-Davidson FL/FLH - Parkerized
$21.50

Colony #3754-1 Circuit Breaker Base Retainer 1936-1964 Harley-Davidson All Models
$21.45

Colony #3751-1 Intake Manifold Conversion Nipple 1940-Up Manifold On 1936-1939 Harley-Davidson OHV
$22.45

Colony #3740-1 Oversized Steering Head Cup 1936-1947 Harley-Davidson Knucklehead 1948-1949 Panhead 1937-1938 U Models - CAD Plated
$42.00

Colony #3733-1 Steering Head Cup 1936-1947 Harley-Davidson Knucklehead 1948-1949 Panhead 1937-1938 U Models - CAD Plated
$42.00

Colony #3732-1 Upper/Lower Fork Neck Bearing Race 1936-1949 Harley-Davidson Knucklehead 1937-1948 Big Twin U Models 1948-1949 Panhead
$27.00

Colony #3145-4 Rocker Box Drain Tube Kit 1936-1937 Harley-Davidson 61 Knucklehead
$35.00

Colony #3140-4 Oversize 1/2-13 Transmission Case Bottom Stud Kit 1915-1936 Harley-Davidson Twins
$22.45

Dynatek Performance Electronics Programing Kit for Dynatek 2000I PC Programmable Ignitions
$177.77

Hawg Supply "Swirl" Engine Cover 1936-1954 Harley-Davidson Big Twins - Machined Finish
$99.99

Hawg Supply Linkert Carburetor to S&S Manifold Adapter Plate
$60.00

Hawg Supply Carburetor Support Bracket for Harley-Davidson Ironheads and Shovelheads with Fuel Filter
$84.99

Fast Eddy Co. No. 56 Intake Leak Tester - 4 Bolt Style
$59.95

Cycle Standard Handlebar Clamp - Finned - Chrome
$31.36

Cycle Standard 8-1/2 inch Pullback Handlebar Riser Set - Chrome
$116.21

Drag Specialties 6-1/2 inch Pullback Handlebar Riser Set - Black
1 review $157.54

Drag Specialties 6-1/2 inch Pullback Handlebar Riser Set - Chrome
$157.54

Drag Specialties 4-1/2 inch Pullback Handlebar Riser Set - Black
$133.85

Drag Specialties 4-1/2 inch Pullback Handlebar Riser Set - Chrome
$133.85

Cycle Standard Shift Lever Bracket 1970-1984 Harley-Davidson FL Models - OEM# 33630-70
$53.88

Cycle Standard Shift Lever - 1982-1994 Harley-Davidson FXR - Chrome - OEM# 34599-81
$27.53

Cycle Standard Shift Lever - 1974-1984 Harley-Davidson FL 1980-1986 FXWG (With Splines) - Chrome - OEM# 34606-74
$20.88

Cycle Standard Brake Pedal Pad 1965-Up Harley-Davidson FL OEM# 36956-65TA
$22.07

Progressive Suspension 412 Series 12" Shocks Chrome With Short Covers 1973-1986 Harley-Davidson Shovelheads
$379.95

Progressive Suspension 412 Series 13.5" Shocks Chrome With Full Covers 1958-1972 Harley-Davidson FL/FLH
$454.95

Progressive Suspension 412 Series 12" Shocks Chrome With Full Covers 1973-1986 Harley-Davidson Shovelheads
$454.95

Progressive Suspension 412 Series 12" Shocks Black With Short Covers 1973-1986 Harley-Davidson Shovelheads
$379.95

James Gaskets Replacement Float Bowl O-ring for 1988-1991 Harley-Davidson CV Carbs
$4.46

Samwel Supplies Axle for Inline Springer Front Forks - CAD Plated
1 review $64.78

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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