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 22mm Petcock Harley-Davidson Style - Black - Left Hand Outlet
21 reviews $34.94

Prism Supply Co. 3/4"-18 Petcock Fits Early Style Harley-Davidson Tanks - Stainless Steel
$134.99

Bad&G Customs Harley Dyna Battery Cover Bag - Bolt-On Storage for 2006 and Up Models
22 reviews $89.99

V-Factor Motorcycle Parts 18 Spoke Black Stainless Steel Brake Rotor - 11.5 inches - Rear - Replaces Harley-Davidson OEM# 41789-92/41797-00
$89.95

Fast Eddy Co. No. 21 Wrist Pin Bushing Installer / Remover
13 reviews $89.95

Cycle Standard Engine Stabilizer Link - Chrome - 1995-2017 Harley-Davidson Dyna
$90.55

Cycle Standard 22mm Petcock Round Body Chrome Harley-Davidson Style - Left Side Position
17 reviews $66.89

Cycle Standard Drilled Stainless Steel Brake Rotor - 11.5 inches - Replaces Harley-Davidson OEM# 41797-00
$90.69

Drag Specialties Vented Screw-In Gas Cap - Chrome - 1982-1996 Harley-Davidson
4 reviews $29.82

Cycle Standard Bayonet / Cam Harley Style Vented 2.5" Gas Cap - Chrome
12 reviews $32.33

Old-Stf Cycle Old-STF Cycle Shovelhead Aluminum Carburetor Intake Support Bracket
$66.00

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

Lowbrow Customs Blade Levers - Polished - 1996 - 2003 Harley Davidson Sportsters and 1996 - 2017 Dyna / Softail / Touring Models
30 reviews $39.18

Lowbrow Customs Radius Breather Bolts for Harley-Davidson Twin Cam - Black ED
14 reviews $44.99

Bates Springer Riser Studs M20 x 1.5 x 1/2-13 inch thread
1 review $37.20

After Hours Choppers Nipple Grip Shift Knob - Brass
$65.00

V-Factor Motorcycle Parts MCM Slash Cut Drag Pipes 1971-1984 Harley-Davidson FX 1981-1982 FXWG - Chrome
$129.99

Cycle Standard Black 6V Square Coil 1948-60 Harley-Davidson Big Twins
$71.93

Cycle Standard 39mm Fork Seal Rebuild Kit - L1987-2022 Harley-Davidson XL Models
1 review $21.56

Cycle Standard Fork Neck Cup Dust Shield Set for Harley-Davidson Big Twins OEM #43865-48A
16 reviews $8.46

Colony #7131-12 Aluminum Alloy Tubular Adjustable Pushrods & Lifter Adapters 1953-1965 Harley-Davidson Panhead
$85.45

Cycle Standard Motorcycle Seat Mount Screw Repair Kit
10 reviews $13.73

Airspeed Cycles High Rise Riserless Tracker Handlebars - 1 inch - Stainless Steel
$255.00

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

Cycle Standard Clutch Hub Retainer With Rollers 1941-1984 Harley-Davidson Big Twins - OEM # 37567-41A
$25.47

Lowbrow Customs Rogue Rear Fender Strut Set 1958 - 1984 Harley-Davidson Panhead Shovelhead
16 reviews $90.68

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

S&S Cycle Precision Hydraulic Tappet Set 2000-Up Harley-Davidson XL 2017-Up M8 1999-17 Twin Cam
$251.96 $279.95

Fork Co., Ltd Sixties Narrow Handlebars - Stainless Steel
2 reviews $251.94

Biltwell Exfil Sissy Bar 2006-2017 Harley-Davidson Dyna - Chrome
$249.95

Fast Eddy Co. No. 19 WA Sprocket Shaft Bearing Installer with Seal Adapter 1955-2002 Harley Big-Twin
3 reviews $249.95

Lowbrow Customs Primary Drive Clutch Locking Tool for Harley-Davidson Big Twins 1940-84
20 reviews $33.02

Lowbrow Customs Throttle Housing 1981-1995 Harley Thread-In Dual Cable - Aluminum - 1 Inch
$83.19

PanAm Oils Inc. Oil/Ignition Shut-Off Valve Pre-2000 Harley-Davidson
$249.49

Bare Knuckle Performance Antihero Stainless Steel Rear Brake Rotor - 11.5 inches Pre-1999 Harley-Davidson Models
$249.00

Bare Knuckle Performance Antihero Stainless Steel Front Brake Rotor - 11.5 inches Pre-1999 Harley-Davidson Models with Speedo Drive
$249.00

Cycle Standard Chrome Headlight Eyebrow Visor for Harley Sportster FX FX FXR - with Indicator Light Holes
$36.58

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

Cycle Standard 5-1/2 inch Forged Aluminum Handlebar Risers - Black
$82.46

Cycle Standard 5-1/2 inch Pullback Handlebar Riser Set - Chrome
$82.46

Colony #2548-8 Clutch Hub Nut Kit 1941-1984 Harley-Davidson Big Twin - Parkerized
14 reviews $20.57

Cycle Standard Mini 2:1 ratio Mechanical Speedometer with Trip Meter - 2.4 inch
11 reviews $87.64

Unity Manufacturing Solid Pushrod Wrench Set
8 reviews $35.00

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

Cycle Standard Fork Neck Cup Set 1948 -1986 Harley-Davidson Big Twin OEM #48311-60
4 reviews $43.29

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

Gasbox Panhead Exhaust Pipe Set 1958-1964 Harley-Davidson Swingarm FL FLH 74 ci - Bare Steel
1 review $239.95

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

V-Factor Motorcycle Parts Lever Action Starter Solenoid 1965-1986 Harley-Davidson Big Twin 4 Speed 1984-1988 Softail - Black
$119.95

Blue Streak High-Performance Points & Condenser Kit for 1970-1979 Harley-Davidson
6 reviews $29.95

Lowbrow Customs 39mm Fork Shrouds - Black - 1987-Up - Harley-Davidson Sportsters
51 reviews $119.18

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

Lowbrow Customs Radius Steering Stem Bolt - Chrome - 39mm Narrow Glide Front End
10 reviews $26.42

James Gaskets Fire Ring Exhaust Port Gaskets - 1966-84 Harley-Davidson FX FL
3 reviews $8.73

Airspeed Cycles Rabbit Ears Handlebars - 12 inch Rise - 1 inch - Stainless Steel
$235.00

Colony #8714-20 Big Bore Headbolt & Washer Kit 1949-Up Harley-Davidson Panhead/Shovelhead - Chrome Plated
1 review $58.66

Andrews J-Grind Camshaft - L1977-1984 Harley-Davidson Shovelhead
$226.76 $251.95

Andrews A2 Camshaft - L1977-1984 Harley-Davidson Shovelhead
1 review $226.76 $251.95

Andrews A2 Camshaft - 1948-1969 Harley-Davidson Big Twin
$226.76 $251.95

Colony #3647-10 Sprocket Bolt Kit 1973-Up Harley-Davidson Big Twin & Sportster Chain Drive Models - Chrome Plated
$26.00

K&N Air Filters Oil Filter - Black - Harley-Davidson Evolution Big Twin Harley and Sportster Models - K&N Part #KN-170
14 reviews $17.99

Colony #3020-8 Head Bolt Set 12 Point 1992-Up Harley-Davidson Big Twin/Twin Cam 1993-Up XL - Zinc Plated
2 reviews $77.00

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

Cycle Standard HD Factory Style Grips - Black 1 inch OEM #56206-81A
21 reviews $16.37

After Hours Choppers Stainless Steel Ratchet Top Shifter - Straight Up - Raw
$225.00

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

Cycle Standard Kickstand Spring 1936 - 1987 Harley-Davidson Big Twins / Pre 1984 Ironhead Sportster Models - Chrome - OEM #50011-30
43 reviews $7.47

Cycle Standard 41MM Chrome Fork Tubes 1984-1999 Harley-Davidson FXWG/D FXST - 34-1/4 inch - 10 Over
$222.77

Lowbrow Customs Belt to Chain Conversion Kit Harley Davidson Dyna Twin Cam 2006-2017 - Silver Sprocket
3 reviews $222.49 $259.99

Lowbrow Customs Fork Nut Wrench Harley-Davidson Big Twin & Sportster Fork Tube Caps
8 reviews $26.42

Cycle Standard 22mm Petcock Harley-Davidson Style - Chrome - Right Hand Outlet
17 reviews $34.68

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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