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
24 reviews $40.36

Cycle Standard 49mm Fork Leg Assembly Rebuild Kit 2016-2021 Harley-Davidson XL1200X 2018-2023 Softails 2014-2023 FLHT/FLHR/FLHX/FLTRX/FLTRU/FLTRK
$98.23

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

Lowbrow Customs Finned Master Cylinder Cover - 1982 - 2005 Harley-Davidson #45004-85
20 reviews $32.26

James Gaskets Wheel Bearing Oil Seals for Big Twin and XL Models - Front or Rear Wheel
19 reviews $6.49

Cycle Standard Swingarm Isolator Mount 1987-2008 Harley-Davidson FLT 87-94 FXR
1 review $28.93

Lowbrow Customs Premium Stainless Steel Exhaust Clamps 1948-1965 Harley-Davidson Panhead
$27.68

Dynatek Performance Electronics Twin Fire II Single Fire Miniature 3 Ohm Coil
1 review $198.57

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

Cycle Standard Deluxe Black Harley-Davidson Brake Light Switch - Knucklehead, Panhead, Flathead (1937-1957) OEM #72004-39
18 reviews $33.24

Cannonball Extended Throwout Bearing for Stealthstarter Electric Starter 1975-1984 4 Speed Harley-Davidson Big Twins
$90.54

Cycle Standard 35MM Chrome Fork Tubes - 23-1/4 inch - Stock Length
4 reviews $180.24

Lowbrow Customs Harley-Davidson Crankshaft Turning / Rotating Tool - 1954 - 2005 Big Twin
9 reviews $38.14

Cycle Electric CE-500L Replacement Regulator for DGV-5000L Generator
6 reviews $180.23 $192.93

Martian Machine Can Cast Aluminum Points Cover - Horizontal
6 reviews $45.00

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

Gasbox Big Twin 4 Speed Oil Filter Mounting Bracket
$59.95

Gasbox Heavy Duty Universal 4 Speed Transmission Mounting Plate
$59.95

Fork Co., Ltd Crown Cover for CV Carburetors
1 review $178.64

Lowbrow Customs Domed Screw-In Gas Cap for Harley-Davidson 1996 & Later - Antique Brass
3 reviews $89.06

Drag Specialties XLX Style Front Fender 1999-05 Harley-Davidson Dyna 86-Up XL 11-Up 883L/1200C/1200CX 14-20 1200T
2 reviews $88.95

James Gaskets Fork Seal Rebuild Kit 1977-1983 Harley-Davidson FL FLH FLH-80 FLT-80 FLT Classic
3 reviews $22.20

Colony #3605-45 Horn Mounting Kit 1936-1941 Harley-Davidson All Models (except VL/RL)
$89.00

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

Cycle Standard Front Fender - Harley-Davidson 1973-up XL FX FXR 35mm 39mm Narrow Glide Front Forks - OEM #59031-83
7 reviews $87.92

Airspeed Cycles Wide Bottom Springer Ape Hanger Handlebars - 11 inch Rise - 1 inch - Stainless Steel
2 reviews $175.00

Drag Specialties Lower Fork Slider Bushings - 39mm - 0.778" - Harley-Davidson OEM #W4546587
1 review $16.00

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

Colony #8793-5 Disc Front Brake Rotor to Hub Torx Screw Kit 1984-Up FX/FXR/FLT/XL - Chrome Plated
11 reviews $14.52

Diamond Primary Chain 1980-2006 Harley-Davidson FLT/FXR/FXRS/FXRT
$173.66 $192.95

James Gaskets Exhaust Port Gasket Kit - Thin Graphite Wire Gaskets & Hex Nuts - 1984-Up Harley-Davidson Evo/Twin Cam 1986-2022 XL
1 review $24.95

Lowbrow Customs Bolt On 13/16 inch Ignition Key Switch Bracket for Harley-Davidson 4 Speed Transmissions - Tumbled Stainless
9 reviews $26.37

Lowbrow Customs PVC Spacer Kit For Extended 35mm Fork Tubes
$14.26

Burly Brand Scrambler Handlebars - 1 inch - Chrome

$171.86 $190.95

Cycle Standard 5-1/2 inch Forged Aluminum Handlebar Risers - Black
$92.64

Hawthorn Co. Cycles Battery Box 4L-BS w/ Breaker Mount & OEM Horseshoe Tank Adapter Plate
$85.00

V-Twin Manufacturing Forged Floorboard Tab Set for 1 inch Tubing
$56.57

Lowbrow Customs Rocker Box Oil Pressure Gauge Adapter Fitting - Brass - 1971 - Up Harley-Davidson Shovelhead, 1971 - 1985 Sportster
8 reviews $30.51

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

Cycle Standard Oil Temperature Dipstick OEM #62635-79 Harley-Davidson 1970-84 Big Twin 1984-94 FXR 1987-92 FLT 1970-78 XL
12 reviews $36.37

Drag Specialties Clutch Cable Harley-Davidson 4 Speed Big Twin 1968-86 - 50" Long
3 reviews $56.13

Lowbrow Customs Radius Steering Stem Bolt - Chrome - 39mm Narrow Glide Front End
12 reviews $30.51

Colony #3019-8 Head Bolt Set 12 Point 1985-1991 Harley-Davidson Big Twin 1986-1992 XL - Zinc Plated
2 reviews $83.00

Cycle Standard Clutch Cable OEM #38602-92 Harley Dyna 1992-2005 - Blacked Out
$41.41 $59.15

Performance Machine Classic 5 Spoke One-Piece Brake Rotor - 11.5 inch - Front
$164.95

Drag Specialties 5 ohm Dual Outlet Coil Single-Fire for Dual Plug Heads
$82.34

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

Drag Specialties Wheel Bearings and Races - Replaces Harley-Davidson OEM #9052
3 reviews $27.37

V-Factor Motorcycle Parts 18 Spoke Black Stainless Steel Brake Rotor - 11.5 inches - Front - Replaces Harley-Davidson OEM #44136-92/44156-00
2 reviews $81.95

Cycle Standard Transmission Mounting Plate 1986-1999 Harley-Davidson Softail - Black
$36.04

Lowbrow Customs Harley-Davidson 45 Flathead Motor Engine Stand
8 reviews $87.62

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

Drag Specialties Replacement Rear Fender 1980-84 Harley-Davidson FXWG
$161.95

James Gaskets 4 Speed Transmission End Cover Gasket 1936-1986 Harley-Davidson Big Twin
1 review $6.46

Cycle Standard Laydown License Plate Mount - Black - Bolt-on Fitment for 1955 - 2018 Harley-Davidson
22 reviews $43.62

Lowbrow Customs PVC Spacer Kit For Extended 41mm Fork Tubes
$14.26

Cycle Standard Direct OEM Replacement Chrome Oil Tank for 1965-1982 Harley-Davidson 4 Speed Models
2 reviews $164.94

Lowbrow Customs Air Cleaner Backplate Gasket for Super E / G Carburetor
45 reviews $2.22

Bates Springer Riser Studs M20 x 1.5 x 1/2-13 inch thread
3 reviews $39.06

The Rough Trade 2-1/8" Wrench for Harley-Davidson Large Port Knucklehead & Panhead Intake
$22.31

Cycle Standard Handlebar Clamp - Finned - Black
$27.59

Cycle Standard Bayonet / Cam Harley Style Non-Vented 2" Gas Cap - Chrome
$14.93

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

Colony #8160-4 Rear Axle Nut and Lock Kit - 1930-1972 Harley-Davidson Knucklehead/Panhead/Shovelhead - Chrome Plated
$31.14

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

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

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

Lowbrow Customs Louvered Air Cleaner for S&S Super E / G Carburetors - Black
20 reviews $81.78

Cycle Standard Replacement Oil Tank Cap Harley-Davidson OEM #62644-84T
7 reviews $14.54

Lowbrow Customs Dished Screw-In Gas Cap for Harley-Davidson 1996 & later - Aluminum
4 reviews $53.41

Gasbox 26 inch Cigar Muffler 1950-1957 Harley-Davidson Panhead - Raw - OEM #65235-50
$150.00

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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