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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Cycle Standard 41MM Chrome Fork Tubes 1949-1976 Harley-Davidson FL - 22 inch - 2 Over
$180.52

Gasbox CV Choke Mount - Tumbled Stainless
24 reviews $18.99

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

American Prime Mfg. Cast Alternator Shroud Cover for Open Belt Drives fits 1970-2006 Harley-Davidson Big Twins - Polished
$72.09

Mooneyes MC Motorcycle Chopper Oil Tank for Harley-Davidson Choppers
10 reviews $360.00

Lowbrow Customs Belt To Chain Conversion Kit 1984-1994 Harley-Davidson Softail - Black Sprocket
$179.99

Bates BattBoy 65 Battery Box 1965-84 Harley-Davidson FL FLH and 1967-78 XL
9 reviews $119.81

Cycle Standard 35MM Chrome Fork Tubes - 25-1/4 inch - 2 Over
3 reviews $178.51

Lowbrow Customs FiltroMax Belt Drive Mounting Bracket
11 reviews $23.77

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

Cycle Electric Stator CE-9902 for 1999-2003 Dyna and 2000 Softail Harley-Davidsons OEM #29951-99
7 reviews $121.18 $129.72

James Gaskets Complete Rocker Cover Gasket Kit 1984-1991 Harley-Davidson Evo Big Twin
$88.41

Gasbox Big Twin Voltage Regulator Mount
27 reviews $21.95

Cycle Standard Replacement Dished Sprocket - Chrome - 51 Tooth - 1973-84 Harley-Davidson Big Twin 1979-81 XL OEM #41470-73
1 review $70.11

Cycle Standard Chrome 12V Square Coil 1948-60 Harley-Davidson Big Twins
$116.75

Unity Manufacturing Solid Pushrod Wrench Set
8 reviews $35.00

Prism Supply Co. 10 Degree Kickstand Adjustment Plate for Harley-Davidson Jiffy Stands
$49.99

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

Hugh's Handbuilt HHB Harley Davidson Sprocket Lock System - Raw Silver (Tumbled Finish)
$69.89

Cycle Standard Chrome Headlight Eyebrow Visor for Harley Sportster FX FX FXR - No Indicator Light Mounting Holes
1 review $49.78

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

Drag Specialties Fat Bob Flatside Style Gas Tanks - 1984-1999 Harley-Davidson FXST/FLST 1985-1986 FX/FXWG - 3.5 Gallon
$348.09

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

Cycle Standard Heavy Duty Clutch Spring Kit 1968-1984 Harley-Davidson Big Twins
$26.46

Motion Pro Clutch Spring Compression Tool - Harley-Davidson XL/Big Twin
2 reviews $85.99

Burly Brand Scrambler Handlebars - 1 inch - Black

1 $171.86 $190.95

Mooneyes MOON Pressure Gauge 0-100 psi
5 reviews $49.00

Burly Brand Stiletto Shock - Black - 13.5 inch - 1999 - 2017 Harley-Davidson Dyna Models
2 reviews $341.96 $379.95

Colony #7132-12 Aluminum Alloy Tubular Adjustable Pushrods & Lifter Adapters - 1966-1984 Harley-Davidson Shovelhead
1 review $85.45

Lowbrow Customs 60 PSI Harley Oil Pressure Gauge - Black Face
39 reviews $42.59

Mooneyes 4 quart Traditional Chopper Oil Tank for Harley-Davidson Choppers
6 reviews $340.00

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

Lowbrow Customs Competition Screw-In Gas Cap for Harley-Davidson 1996 & later - Polished
39 reviews $42.30 $51.64

Lowbrow Customs 39mm Solid Riser Bushings for Harley-Davidson - Black
22 reviews $33.62

Cycle Standard 41MM Chrome Fork Tubes 1984-1999 Harley-Davidson FXWG/D FXST - 24-1/4 inch
$167.43

Mid-USA 21 x 2.15 Black Complete Front Wheel fits Harley-Davidson Sportster XL & FX 1984-1999
11 reviews $334.00

Drag Specialties Fat Bob Style Gas Tanks - 1984-1999 Harley-Davidson FXST/FLST 1985-1986 FX/FXWG - 5 Gallon
$333.67

Kustom Tech Vintage Line Foot Pegs - Auminum & Brass
$331.56

Cycle Standard Foot Peg Chrome Clevis Mounts
21 reviews $27.57

Trader Cody's Choppers Rotary Top Shift Lever 1979-1986 Harley-Davidson Transmissions 4 Speeds - Stainless Steel
2 reviews $30.00

Colony #3082-7 Seat Spring Upper and Lower Set 1958-Up Harley-Davidson Swingarm Big Twins
3 reviews $82.50

Gasbox Heavy Duty Coil Mount - Big Twin 1965 - 1982
17 reviews $21.95

Cycle Standard 22mm Petcock Harley-Davidson Style - Chrome - Left Hand Outlet
30 reviews $36.46

Lowbrow Customs 39mm Low Profile Fork Caps - Aluminum

6 $54.22

Lowbrow Customs 39mm Low Profile Fork Caps - Brass

14 $54.22

Prism Supply Co. Sling Shot Clutch Control - Harley-Davidson 5 & 6 Speed - Stainless Steel
4 reviews $324.99

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

Drag Specialties 3-1/2 inch Pullback Handlebar Riser Set - Black
$105.01

Cycle Standard Wagner Lockheed Type Rear Drum Brake Master Cylinder - Chrome - 1958-1972 Harley-Davidson FL 1971-1972 FX
$104.83

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

Cycle Standard Domed Points Cover OEM #32588-70A for Harley-Davdison 1970 & Up XL 1970 - 1999 Big Twin
18 reviews $18.21

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

Cycle Standard Clutch Hub Bearing Kit - 1941-84 Harley-Davidson Big Twins
3 reviews $44.00

Lowbrow Customs Finned Thread-In Gas Cap for Harley-Davidson 1996 & later - Polished
35 reviews $51.28

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

Cycle Standard 39mm Fork Boot Gaiter Set for Harley Sportster's Front Forks
32 reviews $43.71

Lowbrow Customs Finned Exhaust Flanges 1984-2025 Harley-Davidson Big Twin and 1986-2022 XL (Except Revolution Sportster)
$76.43

Lowbrow Customs Louvered Air Cleaner for S&S Super E / G Carburetors - Black
20 reviews $76.43

Cycle Standard 2 Position Ignition Key Switch Replaces Harley-Davidson OEM #71428-90A
20 reviews $38.20

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

Cycle Standard Deluxe Black Harley-Davidson Brake Light Switch - Knucklehead, Panhead, Flathead (1937-1957) OEM #72004-39
18 reviews $30.22

Colony #7508-20 Upper Pushrod Cover Kit 1940-1947 Harley-Davidson Knucklehead Shovelhead and Evo - Chrome Plated
3 reviews $50.08

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

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

Gasbox Strong Arm Top Motor Mount With OEM #71425-77 Ignition Switch Mount 1948-1984 Harley Big Twins
1 review $74.95

Lowbrow Customs Throttle Housing 1981-1995 Harley Thread-In Single Cable - Black - 1 inch
7 reviews $98.27

Colony #3056-1 Pushrod Lifter ToolHarley-Davidson Knucklehead Panhead Shovelhead
1 review $71.50

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

Motone Billet Bayonet / Cam Harley Style Vented Gas Cap - Black
$34.99

Progressive Suspension Heavy-Duty Fork Springs 1999-2005 Harley-Davidson FXD FXDC FXDL 2004-15 XL Models
3 reviews $139.95

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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