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 #2264-2 Pike Nut Front Axle Covers 1988-2007 Harley-Davidson Sportster 1991-2003 Dyna - Chrome Plated
4 reviews $54.14

James Gaskets Top End Gasket Kit 1948-1965 Harley-Davidson Panhead
1 review $40.59

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

Unity Manufacturing Two Bolt Carburetor Support Bracket - Stainless Steel
4 reviews $18.00

Colony #3193-2 Primary Drain Plug 2004-2006 Harley-Davidson Softail - Zinc Plated
10 reviews $11.50

Solid Custom Rippled Screw-In Billet Gas Cap for 1996 & later Harley-Davidson - Vented - Black
2 reviews $79.99 $99.99

Drag Specialties Replacement Rear Fender 2006-08 Harley-Davidson FLHT/FLHR/FLTR
$154.95

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

Cycle Standard Laydown License Plate Mount - Black - Bolt-on Fitment for 1955 - 2018 Harley-Davidson
22 reviews $39.65

Cycle Standard Swingarm Isolator Mount 1987-2008 Harley-Davidson FLT 87-94 FXR
1 review $26.30

Cycle Standard Chrome Fork Neck Cup Kit for 1949-1987 Harley-Davidson Big Twins
$52.50

Colony #2313-19 Upper and Lower Motor Mount Bolt Kit 1936-1969 Harley-Davidson Big Twin - Parkerized
2 reviews $52.45

Cycle Standard 39mm Fork Seal Rebuild Kit - Showa Forks - 1988-2020 Harley-Davidson XL 1988-94 FXR 1987-2005 Dyna Models
6 reviews $14.25

PanAm Oils Inc. Oil Pressure Gauge 0-60 psi - Chrome
10 reviews $39.18

Colony #9213-4 Upper Inner Pushrod Covers 1979-Up Harley-Davidson Shovelhead 1984-Up Evo 1986-1990 XL
1 review $39.11

Gasbox Wideglide Headlight Mount 1948 - 1985 Harley-Davidson FLH - Tumbled Stainless
7 reviews $25.95

Lowbrow Customs PVC Spacer Kit For Extended 41mm Fork Tubes
$12.96

James Gaskets Fork Seal Rebuild Kit 1949-1977 Harley-Davidson FL
$22.20

Colony #3267-5 Disc Front Brake Rotor to Hub Torx Screw Set 1984-Up Harley-Davidson FX/FXR/XL/FLT - Zinc Plated
6 reviews $9.68

Drag Specialties Clutch Cable OEM #38606-87A Harley-Davidson FXST 1987-1999 +6 inch Extended
$78.39

Cycle Electric Shim Kit CE-8120 for CE-32A Alternators on Harley-Davidsons
2 reviews $22.06 $23.62

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

Colony #8221-20 Head Bolt Kit 1948-Up Harley-Davidson Panhead/Shovelhead - Chrome Plated
8 reviews $76.76

Cycle Standard Engine Stabilizer Link - Chrome - 1982-94 Harley-Davidson FXR 91-94 Dyna 80-08 Touring
2 reviews $76.71

Colony #9629-2 Rear Chain Adjusters - 1936-1972 Harley-Davidsons Knucklehead/Panhead/Shovelhead - Parkerized
4 reviews $15.29

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

Cycle Standard Black 6V Square Coil 1948-60 Harley-Davidson Big Twins
$75.53

Cycle Standard Headlight Visor - 5-3/4" Headlight - Black - Replaces OEM #69735-05
3 reviews $37.64

Colony #2428-6 Handlebar Damper Kit 1973-Up Harley-Davidson Big Twin/Sportster
12 reviews $16.70

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

Unity Manufacturing Linkert Intake Leak Tester - 3 Bolt
1 review $30.00

Unity Manufacturing Linkert Intake Leak Tester - 4 Bolt
2 reviews $30.00

Unity Manufacturing Four Speed Clutch Lockup Tool - BDL/Pro-Clutch
3 reviews $50.00

Colony #2625-30 Rear Fender Support Mounting Kit 1958-1980 Harley-Davidson FL/FLH - CAD Plated
5 reviews $30.00

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

Gasbox Strong Arm Top Engine Mount For Early Big Twin Engines In Gasbox Frames
$74.95

Fast Eddy Co. No. 24 Engine Rotation Socket - 24 Spline for 2007-Up Harley-Davidson Big Twin
$74.95

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

Gasbox Peg Mount License Plate Bracket - 1984-2017 Harley-Davidson Softail - Vertical or Horizontal
8 reviews $49.95

Gasbox Exhaust Clamp 4 Piece Set 1947 - 1957 Harley-Davidson Panhead - Parkerized OEM #47-57 CL HDW
1 review $49.95

Fast Eddy Co. No. 33 Tappet Block Alignment Screws - 3 Pack - 1/4-24 Thread
4 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

Cycle Standard 35mm Fork Seal Rebuild Kit - Showa Forks - 1984-87 Harley-Davidson XL FX FXR
6 reviews $16.23

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

Colony #3735-4 Linkert Carburetor Gasket Kit 1933-65 Harley-Davidson
1 review $13.20

Gasbox Exhaust Squish Pipe 1936-1964 Harley-Davidson Big Twins
$72.50

Cycle Standard HD Factory Style Grips - Black 1 inch OEM #56206-81A
22 reviews $18.01

Bates Linkert 4-Bolt Carb Throttle Conversion Kit 1940-65 Harley-Davidson Knucklehead and Panheads
3 reviews $71.73

Lowbrow Customs FiltroMax Big Twin Bracket - Black
3 reviews $35.86

Colony #8618-20 Big Bore Headbolt & Washer Kit 1949-Up Harley-Davidson Panhead/Shovelhead - Black
4 reviews $47.80

Lowbrow Customs FiltroMax Belt Drive Mounting Bracket
11 reviews $23.77

Lowbrow Customs PVC Spacer Kit For Extended 35mm Fork Tubes
$12.96

Cycle Standard Chrome Kick Return Spring - 1936 - 1984 Harley Knucklehead Panhead Shovelhead #33085-3
4 reviews $23.71

Cycle Standard Oil Filter for Harley-Davidson Dyna Softail and Touring Models - Chrome - OEM #63798-99A 63731-99
8 reviews $12.90

Cycle Standard Drilled Black Brake & Clutch Lever Set for Harley 96-03 Sportster and 96-06 Big Twins
24 reviews $47.09

Colony #8408-1 Transmission Mainshaft Locknut & Washer 1936-1991 Harley-Davidson Big Twin 4 Speed
3 reviews $17.60

Colony #2091-12 Replacement Pushrod Covers Late 1979-1984 Harley-Davidson Shovelhead - Chrome Plated
2 reviews $70.39

Progressive Suspension Heavy-Duty Fork Springs 1999-2005 Harley-Davidson FXDWG
$139.95

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

Cycle Standard Replacement Dished Sprocket - Black - 51 Tooth - 1973-1985 Harley-Davidson Big Twin 1979-81 XL OEM #41470-73
$69.89

Lowbrow Customs Harley-Davidson Crankshaft Turning / Rotating Tool - 1954 - 2005 Big Twin
9 reviews $34.67

Lowbrow Customs Primary Drive Clutch Locking Tool for Harley-Davidson Big Twins 1940-84
23 reviews $34.67

Colony #2425-2 Clutch Pushrod Adjusting Screw Locknut 1941-1984 Harley-Davidson Big Twin - Parkerized
1 review $15.31

Drag Specialties 4-1/2 inch Pullback Handlebar Riser Set - Chrome
$137.75

Drag Specialties Bicycle-Style Kicker Pedal
$45.53

Colony #8728-12 Rubberized Cork Pushrod Cover Seals Pre-1979 Harley-Davidson Panhead/Shovelhead
18 reviews $9.08

Lowbrow Customs Radius Breather Bolts for Harley-Davidson Twin Cam - Brass
3 reviews $44.99

Gasbox Chopper Bolt On Sissy Bar - 2006-2017 Dyna
16 reviews $134.95

Cycle Standard Clutch Cable OEM #38606-87A 1987-1994 Harley-Davidson FXR +4 inch Extended
$67.27

Lowbrow Customs Inline Springer Fork Handlebar Fabricator Top Clamp - Raw Steel
3 reviews $133.84

Cycle Standard Blackout Taillight 1999-2015 Harley-Davidson FL/FX/Sportster (except 12-15 XL1200C/CP)
2 reviews $66.61

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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