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 #2012-8 Head Bolt Set 12 Point 1992-Up Harley-Davidson Big Twin 1993-Up XL - Chrome Plated
5 reviews $109.99

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

Cycle Electric Rectifying Regulator CE-204 - 1981-1988 Harley-Davidson FX FL
9 reviews $164.51 $176.10

Lowbrow Customs Harley-Davidson 45 Flathead Motor Engine Stand
8 reviews $81.89

Lowbrow Customs Mounting Kit for WX Gas Tanks - 1985-1999 Harley-Davidson Softails
4 reviews $65.51

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

Lowbrow Customs Pursuit Shifter Peg for Harleys - Solid Brass
40 reviews $53.56

Lowbrow Customs Belt To Chain Conversion Kit 1995-1999 Harley-Davidson Softail - Chrome Sprocket
1 review $159.99

Lowbrow Customs Belt To Chain Conversion Kit 1995-1999 Harley-Davidson Softail - Black Sprocket
$159.99

Cycle Standard Exhaust Port Gaskets - 1966-1984 Harley-Davidson FX/FL OEM# 65843-68A - 2 Pack
$11.00

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

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

James Gaskets Rocker Cover Gasket Kit 1992-1999 Harley-Davidson EVO Big Twins
$79.26

Lowbrow Customs Radius Breather Bolts for Harley-Davidson Twin Cam - Chrome Plated
19 reviews $44.99

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

S&S Cycle Oil Filter Black '86 & up Sportster and '84 - 99 Big Twin S&S Cycle #31-4101
7 reviews $20.95

Lowbrow Customs Harley-Davidson 4 Speed Transmission Work Stand
23 reviews $38.98

Bates 1/4" NPT Petcock Conversion Kit 1940-65 H-D Big Twins and 45”/750 cc Sidevalves - CAD Plated
4 reviews $77.49

Lowbrow Customs Spare Parts Book for 1971-1980 Harley-Davidson FX
22 reviews $44.13

Colony #8302 CHR Complete Stock Hardware Kit - 1948-1957 Harley-Davidson Panhead - Chrome Plated
$308.88

Drag Specialties Chrome Rear Axle Kit 1973-1983 Harley-Davidson FL/FX OEM# 41552-73
$76.91

Cycle Electric Stator CE-8188 for 1981-1988 Harley-Davidson Big Twin Models OEM #29965-81A
4 reviews $102.37 $109.58

Bar-None Moto BNM Two-Up Bolt On Sissy Bar For Rogue Fender - 1958-1984 Harley-Davidson Panhead/Shovelhead
$307.02

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

Drag Specialties Billet Flange Carb Adapter - Mount Mikuni or CV carb to Harley-Davidson Evo Big Twin/Panhead/Shovelhead/Ironhead Models
13 reviews $43.76

Cycle Standard Foot Peg Chrome Clevis Mounts
22 reviews $27.57

Cycle Standard Replacement Front Springer Fork Fender 1993-Up Harley-Davidson FXSTS
$60.10

Unity Manufacturing Splined Motor Turning Tool - 1954-1999 Harley-Davidson Big Twins
$25.00

Hawg Supply "Milled" 4-Speed Clutch Pressure Plate
$74.99

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

Lowbrow Customs 39mm Narrow Glide Fork Brace - For Lowbrow Narrow Trees
3 reviews $149.96

Fast Eddy Co. No. 10 Transmission Socket 2-1/4" for 2007 & later Harley Big Twins
7 reviews $149.95

Gasbox Strong Arm Top Motor Mount with Coil Mount - 1984-1999 Harley-Davidson Big Twin Evolution
$74.95

Gasbox Strong Arm Top Motor Mount With Coil Mount 1948-84 Harley Big Twins
6 reviews $74.95

Gasbox 35mm Harley-Davidson Narrow Glide Headlight Mount - Tumbled Stainless
14 reviews $29.95

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

Burly Brand Narrow Bottom Ape Hanger Handlebars - 1 inch - 16 inch Rise - Black

2 $148.46 $164.95

Colony #8312 CAD Complete Stock Hardware Kit - 1976-1978 Harley-Davidson Shovelhead - CAD Plated
1 review $295.38

Cycle Standard Handlebar Clamp - Smooth - Chrome
$24.48

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

James Gaskets Top End Gasket Kit 1966-1984 Harley-Davidson Shovelhead
$71.99

Gigacycle Garage Gigacycle Garage Locking Push-In Oil Cap
$71.43

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

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

Cycle Standard Replacement Dished Sprocket - Chrome - 48 Tooth - 1973-1985 Harley-Davidson Big Twin 1979-81 XL OEM #41470-73
2 reviews $70.11

Unity Manufacturing Hydraulic Pushrod Wrench Set
3 reviews $35.00

Unity Manufacturing Solid Pushrod Wrench Set
9 reviews $35.00

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

LCFabrications Clutch Switch Pod Delete - Polished - for H-D
8 reviews $35.00

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

Fiorucci Fabrications Harley Big Twin Rigid Oil Tank 12V Battery Box for RTX5L-BS Battery
1 review $69.95

Gasbox Strong Arm Top Motor Mount 1948-84 Harley Big Twins
7 reviews $69.95

Fast Eddy Co. No. 37 Socket Tool for Oil Pump and Tappet Screen Plugs
7 reviews $27.95

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

Drag Specialties 3-1/2 inch Pullback Handlebar Riser Set - Chrome
2 reviews $55.57

Cycle Standard Screw-In Harley Stock Style Vented Gas Cap - 1982-1995 - Black
$21.37

Lowbrow Customs Radius Steering Stem Bolt - Chrome - 39mm Narrow Glide Front End
11 reviews $27.74

Cycle Standard 39mm Damper Tube Kit - 9.5" - 1994-1996 Harley-Davidson Sportster XL 1995-2017 FXD OEM# 45925-94
$69.00

Lowbrow Customs Lowbrow Customs Spark Plug Wire Set 1982-1994 Harley FXR and Gasbox Ironhead & Big Twin Top Motor Mounts
$22.99

Cycle Standard 49mm Fork Leg Assembly Rebuild Kit 2016-2021 Harley-Davidson XL1200X 2018-2023 Softails 2014-2023 FLHT/FLHR/FLHX/FLTRX/FLTRU/FLTRK
$91.80

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

Colony #2053-10 Custom Sprocket Hex Bolt/Washer Kit Cast Rear Wheels 1997-1998 Harley-Davidson Big Twins 1997-1998 Dyna/FLT 1991-1999 XL - Chrome Plated
3 reviews $30.42

Drag Specialties Clutch Cable Harley-Davidson 4 Speed Big Twin 1968-86 - 50" Long
3 reviews $54.54

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

Lowbrow Customs PVC Spacer Kit For Extended 39mm Fork Tubes
1 review $12.96

Lowbrow Customs 39mm Low Profile Fork Caps - Aluminum

7 $54.22

Lowbrow Customs 39mm Low Profile Fork Caps - Black Anodized Aluminum

12 $54.22

Mooneyes Finned Points Cover for Harley-Davdison 1999 & Up Twin Cam
4 reviews $67.67

Colony #9424-8 Cylinder Base Stud Set 1985-1999 Harley-Davidson Big Twin Evo
$90.20

Forever The Chaos Life FTCL KiCK FLiP Kicker Pedal For Harley-Davidson Motorcycles
$125.00

Drag Specialties Replacement Floorboards Harley-Davidson FL FLST
$134.88

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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