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

Colony #8307 CHR Complete Stock Hardware Kit - 1966-1969 Harley-Davidson Shovelhead - Chrome Plated
$387.28

Lowbrow Customs 39mm Low Profile Fork Caps - Aluminum

7 $58.02

LePera Bare Bones Solo Seat - Diamond - fits 1984-1999 Harley-Davidson Softail
1 review $387.00

Cycle Standard Exhaust Port Gasket 1984-2024 Harley-Davidson Big Twins 1986-2022 XL OEM# 65324-83 - 2 Pack
$18.65

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

Fast Eddy Co. No. 49 Neck Cup Removers
5 reviews $54.95

Drag Specialties Predator 2-Up Seat - Smooth - 1958-84 Harley-Davidson FX/FL
$383.95

V-Twin Manufacturing Foot Clutch Release Arm 1936-1964 Harley-Davidson Big Twin OEM# 3705136
$42.35

Cycle Standard Mini 2:1 ratio Mechanical Speedometer with Trip Meter - 2.4 inch
12 reviews $98.46

Cycle Standard Drilled Stainless Steel Brake Rotor - 11.5 inches - Replaces Harley-Davidson OEM #44136-84A, 44136-92
$101.89

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

Thrashin Supply Co. Mini Floorboard - Black
$379.95

Colony #2488-1 Wheel Lug Wrench - 1936-1972 Harley-Davidson Knucklehead/Panhead/Shovelhead
1 review $63.25

Cycle Standard Primary Chain Adjuster Kit - 1965-2000 Harley-Davidson Big Twin
3 reviews $78.99

James Gaskets Fork Seal Rebuild Kit 1975-1984 35mm Harley-Davidson FX and XL Models
6 reviews $22.19

Lowbrow Customs Spare Parts Book for 1971-1980 Harley-Davidson FX
22 reviews $48.54

Gasbox Front Exhaust Pipe 1966-1969 Harley-Davidson Shovelhead - Chrome - OEM #65443-66
2 reviews $75.00

Gasbox Big Twin Voltage Regulator Mount
27 reviews $21.95

Cycle Standard 41MM Chrome Fork Tubes 1949-1976 Harley-Davidson FL - 22 inch - 2 Over
1 review $189.55

Autolite Spark Plug- Harley Davidson Sportster / Twin Cam Models - Manufacturer Part #4164
21 reviews $7.70

Cycle Standard Screw-In Harley Stock Style Vented Gas Cap - 1996 & up - Black
63 reviews $22.67

Drag Specialties Hydraulic Brake Light Switch 1984-99 Harley-Davidson FLST/FX/FXST/FXR 79-85 XL 91-98 Dyna 71-84 FX 80-98 FLT 82-83 FXR
8 reviews $21.35

Lowbrow Customs Finned Thread-In Gas Cap for Harley-Davidson 1996 & later - Polished
35 reviews $54.87

Lowbrow Customs FiltroMax Big Twin Bracket - Tumbled
10 reviews $32.10

Prism Supply Co. Bristol Breather - CV Carburetor - Polished
$60.00

Old-Stf Cycle Pushrod Cover Keeper Set - Drilled Brass - Big Twin Evo Shovelheads & Knuckles
19 reviews $40.00

Drag Specialties Fat Bob Flatside Style Gas Tanks - 1984-1999 Harley-Davidson FXST/FLST 1985-1986 FX/FXWG - 3.5 Gallon
$358.23

S&S Cycle Tear Drop Air Cleaner - Chrome - 1993-2009 Harley-Davidson Big Twin
1 review $356.36 $395.95

Trader Cody's Choppers Midway Mid Controls 1970-1984 Harley-Davidson Shovelhead 1984-1999 Evo - Black
$355.00

Cycle Standard 41MM Chrome Fork Tubes 1984-1999 Harley-Davidson FXWG/D FXST - 26-1/4 inch - 2 Over
$181.81

Cycle Standard Chrome Headlight Eyebrow Visor for Harley Sportster FX FX FXR - No Indicator Light Mounting Holes
2 reviews $54.76

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

Gasbox Open Belt Drive Primary License Plate Mount for Harley - Vertical or Horizontal
3 reviews $69.95

Lowbrow Customs Radius Fork Tube Caps - Chrome - 39mm Narrow Glide Front End
6 reviews $45.76

Kibblewhite Precision Machining Heavy Duty Clutch Spring Set - 1966 - 1984 Shovelhead
10 reviews $49.20

James Gaskets Primary Cover & Inspection Cover Gasket Kit 8-Hole Primary Cover 1970-1982 Harley-Davidson Shovelhead
$68.87

Burly Brand Scrambler Handlebars - 1 inch - Black

1 $171.86 $190.95

Old-Stf Cycle Shovelhead Rocker Box Split Oil Lines - Stainless Steel
14 reviews $114.29

Cycle Standard Domed Points Cover OEM #32588-70A for Harley-Davdison 1970 & Up XL 1970 - 1999 Big Twin
19 reviews $20.03

Cycle Standard Front Motor Mount 1982-94 Harley-Davidson FXR 80-08 FLH FLT
$36.51

Cannonball Fender Insert For Use With Stealthstarter Electric Starter Kit Rigid Frame 4 Speed Harley-Davidson Big Twins
$85.00

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

James Gaskets Fork Seal 49MM Rebuild Kit 2006-Up Harley-Davidson FXD/FLD
4 reviews $28.29

Autolite Spark Plug- 1975-1981 Shovelhead & Evo Big Twins - Manufacturer Part #4265
14 reviews $7.70

Lowbrow Customs Fish Scale Master Cylinder Cover - 1982 - 2005 Harley-Davidson #45004-85
18 reviews $32.34

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

Mooneyes MOON No Name Air Cleaner for CV or S&S Super E/G Carburetors
5 reviews $112.00

S&S Cycle Standard Band Intake Manifold - Super B/E - 1978-1984 Harley-Davidson Shovelhead
1 review $115.90 $121.95

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

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

Motone Screw-In Billet Gas Cap for 1996 & later Harley-Davidson - Vented - Satin Brass
1 review $82.47 $102.22

Clymer Manuals 1966 - 1984 Harley Davidson Shovelhead Manual
15 reviews $54.95

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

Cycle Electric Rectifying Regulator CE-324 32 Amp - 1999-2003 Harley-Davidson Dynas
3 reviews $164.50 $176.09

Lowbrow Customs Pursuit Shifter Peg for Harleys - Solid Brass
40 reviews $57.31

Cycle Standard Ignition Advance Unit - Stainless Steel - 1970-Up Harley-Davidson OEM #3251770T
1 review $57.13

Cycle Standard Universal Fork Boot Gaiter Set for 41mm Front Forks
11 reviews $47.80

Lowbrow Customs Spare Parts Book for 1958-1968 Harley-Davidson Panhead Shovelhead
15 reviews $38.83

Drag Specialties 6-1/2 inch Pullback Handlebar Riser Set - Black
1 review $162.13

Lowbrow Customs Louvered Air Cleaner for Harley CV / EFI 1991-2020 - Black
51 reviews $81.78

Colony #2349-6 Handlebar Heavy Duty Damper Kit 1973-Up Harley-Davidson Big Twin & Sportster
17 reviews $20.04

Bad&G Customs Harley Dyna Battery Cover Bag - Bolt-On Storage for 2006 and Up Models
23 reviews $110.00

James Gaskets Exhaust Gasket/Mounting Kit for Harley-Davidson 1984-2013 Big Twins and 1986-2013 XL
16 reviews $24.43

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

Cycle Standard 5-1/2 inch Pullback Handlebar Riser Set - Chrome
$106.42

Cycle Standard Springer Style Bottom Mount Headlight - Chrome
11 reviews $107.03

Lowbrow Customs Throttle Housing 1981-1995 Harley Thread-In Single Cable - Black - 1 inch
7 reviews $105.15

Lowbrow Customs Bottom Mount Headlight Bracket - Harley Narrow Glide, Triumph, BSA - Tumbled Stainless
7 reviews $45.76

Autolite Spark Plug- 1966-1974 Shovelhead/ 1948-1968 Panhead - Manufacturer Part #4275
8 reviews $6.27

Cycle Standard Fork Neck Cup Dust Shield Set for Harley-Davidson Big Twins OEM #43865-48A
17 reviews $10.24

Colony #2675-20 Footboard Mounting Kit 1936-1954 Harley-Davidson Davidson Big Twin - Parkerized
2 reviews $60.50

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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