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

Sort by

Gasbox Hi Lo Shotgun Exhaust Pipe Set 1970-1984 Harley-Davidson Shovelhead
9 reviews $279.99

Prism Supply Co. Quick Stick Start Lever 2.0 1991-Up Harley-Davidson Sportster 1989-Up Big Twin - Matte Aluminum
4 reviews $119.99

Lowbrow Customs 39mm Tapered Fork Lowers - Black
$334.04

Cannonball Springbrake Disc Brake Kit for I-Beam And Classic Springer Forks - Star Hub
1 review $1,656.10

Cycle Electric Generator DGV-5006H 6 Volt for 1936-1957 Harley-Davidsons w/Heli Coils
1 review $569.01 $609.10

Timken Neck Post Bearing & Race Set Made in USA
17 reviews $28.14

Cycle Standard Drilled Stainless Steel Brake Rotor - 11.5 inches - Replaces Harley-Davidson OEM #41791-79A
1 review $95.22

Gasbox 007 Stainless Air Cleaner for 1991-2022 Harley-Davidson CV Carburetor/EFI
38 reviews $99.95

Kustom Tech Vintage Line Forward Controls - Black & Brass - 1986-99 Harley-Davidson FL/FXST
$1,554.67

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

Mullins Chain Drive 35mm Super Narrow Triple Trees Set
4 reviews $500.00

Lowbrow Customs T-Bars Handlebars - 10 inch Rise - 1 inch Diameter - Black
25 reviews From $136.11

Cycle Standard 8 inch Forged Aluminum Handlebar Risers - Chrome
1 review $119.70

V-Factor Motorcycle Parts MCM Slash Cut Drag Pipes 1986-2006 Harley-Davidson Softail - Chrome
4 reviews $129.99

Airspeed Cycles T-Bar Handlebars - 12 inch Rise - 1 inch - Stainless Steel
$235.00

Lowbrow Customs Belt to Chain Conversion Kit Harley-Davidson Dyna 1994-99 - Black Sprocket
11 reviews $199.99

Kustom Tech Vintage Line Forward Controls - Aluminum & Brass - 1986-99 Harley-Davidson FL/FXST
1 review $1,396.03

Lowbrow Customs Motorcycle Neck Cup & Bearing Race Installer Tool
3 reviews $46.95

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

Gasbox Upswept Exhaust Pipe Set for 1970-1984 Harley-Davidson Shovelhead Rigid Applications
$329.95

Cycle Standard 1936-1986 Harley-Davidson Big Twin 4 Speed Kickstarter Rebuild Kit
2 reviews $118.75

Cycle Standard 5 Stud Clutch Hub Assembly - Harley-Davidson Big Twins 1941-1984 OEM #37550-41B
6 reviews $108.81

Cycle Standard Front Brake Master Cylinder Assembly - Black - Single Disc 1996-2017 Models (EXCEPT 15-17 Softail, 08-17 Dressers, Trike, 04-17 XL)
$185.44

Lowbrow Customs Rear Suspension Delete Kit 1984-1999 Harley-Davidson Softails
$185.39

Cycle Electric LeBeef Generator DGV-5000-LH-CP 12 Volt Low Voltage - 1936-1964 Harley-Davidsons w/Heli Coils
1 review $652.30 $698.26

Lowbrow Customs Lowbrow Customs Springer Lil Speedies Handlebars - 1 inch - Raw
4 reviews $160.67

Cycle Electric CE-8010-08 Stator Replacement for 2008-2017 Harley Dyna & Softail OEM #30017-08
19 reviews $163.88 $175.43

Cycle Standard Bobbed Rear Fender With 1973-Up Light Mount for 1984-1999 Harley-Davidson Softail
2 reviews $182.76

Fast Eddy Co. No. 12 Float Bowl Drain Valve for S&S Super E / G / B Carburetors
30 reviews $44.95

Mid-USA 6 Speed Transmission - Cast Finish - 1990-1999 Harley-Davidson Softail
$1,250.00 $1,414.70

Lowbrow Customs Belt to Chain Conversion Kit Harley-Davidson Dyna 2000-05 Mag Wheels - Chrome Sprocket
$207.99

Cycle Electric LeBeef Generator DGV-5000-CP 12 Volt - 1965-1984 Harley-Davidsons
$638.37 $683.35

Cycle Standard 41MM Chrome Fork Tubes 1984-1999 Harley-Davidson FXWG/D FXST - 28-1/4 inch - 4 Over
$206.97

Lowbrow Customs T-Bars Handlebars - 12 Inch Rise - 1 inch Diameter - Black
1 review $137.28

Cycle Standard 39MM Chrome Fork Tubes - 29 inch - 4 Over
5 reviews $244.73

Lowbrow Customs Louvered Air Cleaner for Harley CV / EFI 1991-2020 - Black
51 reviews $76.43

Fast Eddy Co. No. 3 Pinion Gear Puller for all 1999 & earlier Harley-Davidson
14 reviews $109.95

FNA Custom Cycle Twisty Transmission Plate - Harley-Davidson Big Twin 4 Speeds
3 reviews $240.00

Lowbrow Customs 39mm Narrow Glide Fork Brace - Standard Width
3 reviews $149.96

American Prime Mfg. Transmission Bearing Support
2 reviews $59.95

Lowbrow Customs Premium Stainless Steel Intake Clamp Kit 1955-1977 Harley-Davidson FL/FX/XL
9 reviews $30.57

Til Death Cycles 49mm Harley-Davidson Front End Extended Damper Tube Kit
4 reviews $119.12

Drag Specialties Complete Advance Unit Assembly 1970-1999 Harley Davidson Big Twin 1971-2003 XL Points Ignition (Except Single Fire Ignition)
6 reviews $64.43

Cycle Craft Carburetor Rebuild Kit 1988-2006 Harley-Davidson CV Carbs
9 reviews $25.70

Mooneyes Finned Points Cover for Harley-Davidson Big Twins
36 reviews $67.67

Cycle Standard Drilled Stainless Steel Brake Rotor - 11.5 inches - Replaces Harley-Davidson OEM #41797-00
1 review $95.22

Mooneyes 60 psi Oil Pressure Gauge
36 reviews $49.00

Cycle Standard Isolator Motor Mount - Front - 1991-2017 Harley-Davidson Dyna
6 reviews $111.82

Cycle Standard 3 Stud Clutch Hub Assembly - Harley-Davidson Big Twins 1941-1984 - OEM #37550-41B
15 reviews $111.80

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

Cycle Electric Rectifying Regulator CE-606- 2006-2008 Harley-Davidson FLH FLT
32 reviews $221.97 $237.61

Cycle Standard Drilled Stainless Steel Brake Rotor - 11.5 inches - Replaces Harley-Davidson OEM #44156-00
4 reviews $95.22

Cycle Electric Generator DGV-5000-BLK 12 Volt - 1965-1984 Harley-Davidson - Blacked Out
2 reviews $535.58 $573.32

Cycle Standard 3 position Ignition Key Switch Replaces Harley-Davidson OEM #71425-77 - Black Body / Black Bezel
16 reviews $37.72

Lowbrow Customs Pursuit Foot Peg Set - Brass
38 reviews $167.35

Cycle Standard Chrome Kickstand Kit - 1966 - 1986 Harley-Davidson FL FX
15 reviews $110.85

Cycle Electric Stator CE-3845-02 for 2002 - 2005 Harley-Davidson FLH and FLT Models
11 reviews $143.49 $153.60

Cycle Standard Screw-In Harley Stock Style Vented Gas Cap - 1996 & up - Chrome
38 reviews $26.62

Cycle Standard 3 position Ignition Key Switch Replaces Harley-Davidson OEM #71425-77 - Chrome Body / Chrome Bezel
18 reviews $37.80

Fast Eddy Co. No. 6 Transmission Socket 1-7/8" for 1936-2005 Harley Big Twins
17 reviews $139.95

Cycle Standard 35MM Chrome Fork Tubes - 31-1/4 inch - 8 Over
1 review $189.62

Cycle Standard Drilled Stainless Steel Brake Rotor - 10 inches - Replaces Harley-Davidson OEM #44137-77A
2 reviews $94.29

Lowbrow Customs Deluxe Choke Knob Enricher for Harley-Davidson S&S Super E and G Carburetors - Brass
74 reviews $46.85

V-Factor Motorcycle Parts Lever Action Starter Solenoid 1965-1986 Harley-Davidson Big Twin 4 Speed 1984-1988 Softail - Chrome
9 reviews $131.95

S&S Cycle Super E Manifold Conversion Kit for 80" Harley-Davidson Evolution
1 review $229.46 $254.95

Colony #3020-8 Head Bolt Set 12 Point 1992-Up Harley-Davidson Big Twin/Twin Cam 1993-Up XL - Zinc Plated
3 reviews $83.00

Cycle Electric Regulator CE-540L for use on 12v Harley-Davidson Generators
22 reviews $181.55 $194.34

Gasbox Strong Arm Top Motor Mount for Crank Start Key Switch - 1984-1999 Harley-Davidson Big Twin Evolution
1 review $74.95

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

Bates BattBoy Battery Box for Modern Gel or Li-Ion Batteries fits OEM-style Harley-Davidson Horseshoe Oil Tanks
25 reviews $149.09

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.

Read less

Harley-Davidson Big Twin Parts FAQ

STAY CONNECTED
WITH LOWBROW

NO SPAM, EVER. JUST GREAT STUFF. YOUR INFO IS NEVER SHARED.