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

Lowbrow Customs Spare Parts Book for 1936-1948 Harley-Davidson Knucklehead and Flathead
8 reviews $35.30

Colony #2966-10 Grade 8 Head Bolt Kit 1977-1984 Harley-Davidson Shovelhead - CAD Plated
3 reviews $44.00

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

Cycle Standard Popsicle Kicker Pedal with Rubber for 1977 & earlier Harley-Davidson Kicker Arms Replaces OEM #33175-16A
18 reviews $25.14

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

LCFabrications Clutch Switch Pod Delete - Polished - for H-D
8 reviews $35.00

LCFabrications Brake Switch Pod Delete - Polished - for H-D
16 reviews $35.00

Cycle Standard 5-1/2 inch Forged Aluminum Handlebar Risers - Black
$86.58

Cycle Standard 5-1/2 inch Forged Aluminum Handlebar Risers - Chrome
$86.58

Cycle Standard 5-1/2 inch Pullback Handlebar Riser Set - Black
$86.58

Cycle Standard 35MM Chrome Fork Tubes - 23-1/4 inch - Stock Length
4 reviews $171.66

Drag Specialties Lower Fork Slider Bushings - 39mm - 0.778" - Harley-Davidson OEM #W4546587
1 review $15.55

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

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

Prism Supply Co. Motor Mount Mid-Pegs for Harley-Davidson Big Twins - Stainless Steel
$84.99

Cycle Standard Bayonet / Cam Harley Style Vented 2.5" Gas Cap - Chrome
13 reviews $33.95

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

Colony #8231-26 Transmission Mounting Kit 1936-1964 Harley-Davidson Big Twin - Chrome Plated
1 review $56.18

Drag Specialties Wheel Bearings and Races - Replaces Harley-Davidson OEM #9052
3 reviews $28.00

Drag Specialties Sintered Front Brake Pads 84-99 H-D XL 84-94 FXR 91-98 Dyna 84-99 FLT/FLHT/FLHS/FLHR/FLTR/FXST/FLST/FXWG 88-99 FXSTS
$42.00

Lowbrow Customs Domed Screw-In Gas Cap for Harley-Davidson 1996 & Later - Antique Brass
3 reviews $83.23

Lowbrow Customs Banded Screw-In Gas Cap for Harley-Davidson 1996 & later - Brass
38 reviews $83.23

Lowbrow Customs Dished Screw-In Gas Cap for Harley-Davidson 1996 & later - Brass
16 reviews $83.23

Lowbrow Customs Rocker Box Oil Pressure Gauge Adapter Fitting - Brass - 1971 - Up Harley-Davidson Shovelhead, 1971 - 1985 Sportster
8 reviews $27.74

Lowbrow Customs Rocker Box Oil Pressure Gauge Adapter Fitting - Chrome - 1971 - Up Harley-Davidson Shovelhead, 1971 - 1985 Sportster
9 reviews $27.74

Lowbrow Customs Dual 4-1/2 inch Bottom Mount Headlight Bracket - Harley Narrow Glide, Triumph, BSA - Tumbled Stainless
5 reviews $41.60

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

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

Burly Brand Narrow Bottom Ape Hanger Handlebars - 1 inch - 16 inch Rise - Chrome

2 $165.56 $183.95

Burly Brand Narrow Bottom Ape Hanger Handlebars - 1 inch - 14 inch Rise - Chrome

3 $165.56 $183.95

Burly Brand Ape Hanger Handlebars - 1 inch - 12 inch Rise - Chrome

2 $165.56 $183.95

Cycle Standard Exhaust Port Gasket 1984-2024 Harley-Davidson Big Twins 1986-2022 XL OEM# 65324-83 - 5 Pack
$27.50

Cycle Standard Handlebar Clamp - Finned - Chrome
$32.93

Cycle Standard Front Fender - Harley-Davidson 1973-up XL FX FXR 35mm 39mm Narrow Glide Front Forks - OEM #59031-83
7 reviews $82.17

Cycle Standard Transmission Mounting Plate 1986-1999 Harley-Davidson Softail - Black
$32.76

Cycle Standard Speedometer Mounting Gasket for Harley-Davidson 1989-1991 Sportster XL Models and 1987 - 1994 FXR OEM #67104-83
30 reviews $16.30

EBC Brakes Sintered Rear Brake Pads 1991-98 H-D FXD/FXDL/FXDWG 84-94 FXR L87-99 FXST/FXSTB/FXSTC/FXSTS/FLST/FLSTC/FLSTF/FLSTS
1 review $54.14 $56.31

Colony #2299-10 Front Brake Shackle Rebuilding Kit 1936-1938 Harley-Davidson Big Twin/45's
$81.21

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

Cycle Craft #46 Pilot Jet - 1988-2006 Keihin CV Carburetor
2 reviews $5.99

Drag Specialties Vintage Style Half Moon Floorboards - Chrome
2 reviews $160.63

Cycle Standard Clutch Hub Retainer With Rollers 1941-1984 Harley-Davidson Big Twins - OEM #37567-41A
1 review $26.74

Marion Metalworks Big Twin Fabricator Shifter Plate - Stainless Steel
$20.00

V-Factor Motorcycle Parts MCM Slash Cut Drag Pipes 1971-1984 Harley-Davidson FX 1981-1982 FXWG - Black
$159.99

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

Fast Eddy Co. No.26 Cylinder Head Holder - 12MM/14MM Ends
$79.95

Colony #9602-8 Oil Tank Mounting Kit - 1936-1957 Harley-Davidson Knucklehead/Panhead- Chrome Plated
2 reviews $19.97

Colony #8856-8 Cylinder Base Stud Set 1930-1977 Harley-Davidson Big Twins OEM #16831-30
3 reviews $31.87

Cycle Standard 3-1/2 inch Forged Aluminum Handlebar Risers - Black
$79.51

Drag Specialties High Performance Battery 2000-Up Harley-Davidson Softails 99-17 FXD/FXDWG/FLD
$158.95

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

Drag Specialties 6-1/2 inch Pullback Handlebar Riser Set - Black
1 review $157.54

Drag Specialties Skeleton Kickstarter Pedal - Brass
1 review $157.54

The Speed Merchant Speedpegs Foot Pegs - Black
$157.46 $174.95

Colony #8806-17 Motor Mounting Kit Upper & Lower 1970-1984 Harley-Davidson Big Twin - Chrome Plated
4 reviews $39.11

Lowbrow Customs Harley-Davidson 4 Speed Transmission Work Stand
23 reviews $38.98

Lowbrow Customs Pursuit Shifter Peg for Harleys - Raw Aluminum
28 reviews $31.03

Cycle Standard Hidden / Internal Fork Stop Kit Harley-Davidson Big Twins
$77.54 $103.38

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

Cycle Standard Exhaust Port Gasket 1984-2024 Harley-Davidson Big Twins 1986-2022 XL OEM# 17048-98 - 2 Pack
$11.00

Colony #9660-1 Gas Strainer Assembly 1942-1949 Harley-Davidson Twins - CAD Plated
3 reviews $76.76

The Speed Merchant 39 mm Fork Preload Adjuster - Gold Finish
$152.96 $169.95

The Speed Merchant 39 mm Fork Preload Adjuster - Black Anodized Finish
$152.96 $169.95

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

Cycle Standard Throttle Idle Cable OEM #56355-96A Harley Dyna 1996-2008 - Blacked Out
2 reviews $25.35 $36.21

Lowbrow Customs Chrome Solo Seat Bolt-On Spring Mounts for Harley-Davidson Swingarm Frames 1958 - 1985
1 review $37.83

Colony #3144-13 Transmission Kicker Cover Stud Kit 1936-84 Harley Davidson Big twins — Colony #3144-13 Transmission Kicker Cover Stud Kit 1936-1984 Harley-Davidson Big Twins - CAD Plated
3 reviews $25.00

Prism Supply Co. Ratchet Top Shifter Plate - Mild Steel
$29.99

Fast Eddy Co. No. 10 Transmission Socket 2-1/4" for 2007 & later Harley Big Twins
7 reviews $149.95

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

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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