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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Fast Eddy Co. No. 67 Plumber Nut Intake Wrench 2-1/8" for 1941-1954 Harley-Davidson FL Large Style Intakes
$74.95

Cycle Standard Replacement 41MM Fork Springs 1984-1999 Harley-Davidson FXST OEM# 46048-84
$44.99

Cycle Electric Rectifying Regulator CE-445 - 1995-1996 Harley-Davidson FLHYCUI/FLHTCI/FLCUI
$238.18 $254.96

Cycle Electric CE-506 Replacement Regulator for DGV-5006 Generator
$200.46 $214.59

Cycle Electric CE-102L Replacement Regulator 1936-1964 Harley-Davidson 12 Volt Conversion w/Battery in Oil Tank
$140.51 $150.41

Cycle Electric Generator DGV-5006 6 Volt for 1936-1964 Harley-Davidsons with 5/16-24 mounting bolts
$555.08 $594.19

Cycle Electric Generator DGV-2578 6 Volt for 1958-1964 Harley-Davidsons with 5/16-24 mounting bolts
$420.00 $449.60

Cycle Electric Generator DGV-2569H 65A 12v for 1936-1957 Harley-Davidsons with 1/4-24 mounting bolts
$422.79 $438.66

Cycle Electric Generator DGV-2569M 65A 12v for 1936-1957 Harley-Davidsons with 5/16-24 mounting bolts
$395.86 $423.75

Unity Manufacturing Clutch Lockup Tool - 1985-1989 Harley-Davidson Big Twin
$50.00

James Gaskets Primary Cover & Inspection Cover Gasket Kit 8-Hole Primary Cover 1965-1969 Harley-Davidson Big Twins
$68.87

Cannonball Gasket for Cannonball Heavy Duty Kickstarter Kit Cover
$19.99

Fast Eddy Co. No. 59 Valve Guide Drivers - 5/16 I.D. - Harley-Davidson Evo Big Twin/Twin Cam/Evo XL
$29.95

Fast Eddy Co. No. 57 Valve Guide Drivers - 3/8 I.D. - Pre-1984 Harley-Davidson Big Twin
$29.95

Drag Specialties Forward Control Kit With Pegs 1982-1994 & 1999-2000 Harley-Davidson FXR Models
$419.71

Cycle Standard Replacement Dished Sprocket - Black - 47 Tooth - 1973-1985 Harley-Davidson Big Twin 1979-81 XL
$71.89

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

Drag Specialties Chrome Rocker Box Cover 1992-1999 Harley-Davidson EVO Big Twins
$386.85

Drag Specialties Chrome Transmission Top Cover 1987-1999 Harley-Davidson EVO Big Twins w/ 5-Speed Transmission
$86.95

Cycle Standard 12" Black Shocks With Black Spring - Stock Length - 1973-1984 Harley-Davidson FX/FXE 1972-1984 FL
$233.91

Cycle Standard 12" Chrome Shocks With Chrome Spring - Stock Length - 1973-1984 Harley-Davidson FX/FXE 1972-1984 FL
$233.91

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

Drag Specialties Steel Clutch Plate Set L1984-1989 Harley-Davidson Big Twins
$39.17

Drag Specialties Aramid Fiber Clutch Plate Set L1984-1989 Harley-Davidson Big Twins
$90.05

Drag Specialties Fat Bob Flatside Style Gas Tanks - 1984-1999 Harley-Davidson FXST/FLST 1985-1986 FX/FXWG - 3.5 Gallon
$358.23

Drag Specialties 41mm Lower Fork Slider Bushing 1984-2010 Harley-Davidson FXST/C 1993-2005 FXDWG 86-17 FLST 84-13 FLHT 11-13 FXS OEM# 45866-84
$16.00

Drag Specialties 41mm Upper Fork Slider Bushing 1984-2010 Harley-Davidson FXST/C 1993-2005 FXDWG 86-17 FLST 84-13 FLHT 11-13 FXS OEM# 45940-84
$16.00

Drag Specialties 35mm Lower Fork Slider Bushing 1984-1987 Harley-Davidson FX/FXE/FXR 84-87 XL OEM# 45416-84
$14.93

Colony #3800-24 OEM Style Valve Cover Screw 1948-1950 Harley-Davidson Panhead
$22.00

Colony #3736-2 Air Cleaner Cover Mounting Screw Kit 1983-Up Harley-Davidson Big Twins - Chrome
$16.50

Colony #3795-2 Cam Shaft Lever Screw & Nut Kit 1934-1936 Harley-Davidson RL/VL/Servi-car
$15.40

Colony #3737-2 Air Cleaner Cover Mounting Screw Kit 1983-Up Harley-Davidson Big Twins - Zinc Plated
$13.20

Colony #3802-5 Stoplight Switch Gasket 1939-1957 Harley-Davidson - 5 Pack
$12.38

Colony #3797-4 Exhaust/Saddlebag Spacers 1954-1957 Harley-Davidson - 4 Pack - CAD Plated
$10.89

American Prime Mfg. Complete Comp Master Clutch fits 1999-2006 Harley-Davidson EVO & Twin Cam Big Twins
$634.47

American Prime Mfg. Complete Comp Master Clutch fits 1990-1997 Harley-Davidson Big Twin
$622.33

American Prime Mfg. Complete Comp Master Clutch fits 1936-1984 Harley-Davidson Pre-EVO Big Twin
2 reviews $639.76

Gigacycle Garage Gigacycle Garage FXR Side Panel Screws & Seat Screw for Ness Style side panels
$131.43

Gigacycle Garage Gigacycle Garage Left Side Non-Vented Gas Cap for 1992-Up Harley-Davidsons
$107.14

Gasbox Upswept Exhaust Pipe Set for 1948-1965 Harley-Davidson Panhead Rigid Applications
$389.95

Lectron Lectron Billetron Carburetor for 100-124 Cubic Inch Harley-Davidsons
$899.00

Airspeed Cycles Pullback T-Bar Handlebars - 6 inch Rise - 1 inch - Stainless Steel
$255.00

Lowbrow Customs Axle Plate Offset License Plate Bracket for 1936 - 1957 Harley-Davidson Big Twin Rigid Frames
$58.41

Trader Cody's Choppers Midway Mid Controls 1970-1984 Harley-Davidson Shovelhead 1984-1999 Evo - Black
$355.00

Prism Supply Co. Motor Mount Mid-Pegs for Harley-Davidson Big Twins - Powder Coated Black
$94.99

Prism Supply Co. Blade Style Push-in Oil Plug - Tumbled
$54.99

Prism Supply Co. Darlington Air Cleaner - CV Carburetor - Brushed Aluminum
$224.99

LePera Cobra Seat - Smooth - fits 1984-1999 Harley-Davidson Softail
1 review $433.00

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

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

Belt Drives LTD. 2" Open Belt Drive Kit - Black - 1990-2006 Harley-Davidson FXST/FLST
$3,233.51 $3,403.69

Belt Drives LTD. 2" Open Belt Drive Kit - Polished - 1990-2006 Harley-Davidson FXST/FLST
2 reviews $2,958.01 $3,113.69

Colony #3406-2 Generator Terminal Bolt Clip and Insulator Kit 1958-1969 Harley-Davidson FL/FLH 1958-65 Servi-car 1958-1981 Sportster
$11.50

Colony #2931-5 Linkert Carb Support Bracket 1936-1940 Harley-Davidson OHV Big Twins - Parkerized
$19.25

Colony #2923-5 Air Cleaner Mounting Screw Kit Longer Screws 1956-1965 Harley-Davidson Twins - Parkerized
$16.94

Colony #2914-2 Rocker Stud Spacer Kit 1931-1940 Harley-Davidson Big Twin - CAD Plated
$13.31

Colony #2907-2 Oil Tank Filler Cap and Gauge 1936-1940 Harley-Davidson Big Twins - Parkerized
$71.50

Colony #2905-2 Undersized Brass Intake Manifold Seals 1940-1954 Harley-Davidson OHV 1953-1956 K KH
$20.00

Colony #2901-4 Crank Pin Nut Lock Plates 1936-1940 Harley-Davidson Big Twins
$7.26

Colony #2893-3 Starter Crank Clamp Bolt 1941-1967 Harley-Davidson FL/FLH - Chrome Plated
$8.80

Colony #2891-3 Starter Crank Clamp Bolt 1941-1967 Harley-Davidson FL/FLH - Parkerized
$11.00

Colony #2597-17 Legshield Mounting Kit 1940-1942 Harley-Davidson WLA - Parkerized
$29.70

Colony #2582-3 Shifter Lever Stud Kit 1938-1946 Harley-Davidson 45s & Big Twins with Handshift - Parkerized
$16.94

Colony #9990-5 Front Axle Nut Spacer Kit Grooved 1995-1996 Harley-Davidson FXDWG - Chrome Plated
$46.35

Colony #9989-4 Front Axle Nut Spacer Kit Smooth 1994-1999 Harley-Davidson FLHR/FLHRCI - Chrome Plated
$31.87

Colony #9987-4 Rear Wheel Adjusting Screw Flat Head Allen 1991-Up Harley-Davidson Dyna Glide - Chrome Plated
$13.16

Colony #9961-12 Handlebar Clamp & Gauge Mount Kit Acorn 1995-Up Harley-Davidson FX/XL - Chrome Plated
$15.94

Colony #9843-8 Chrome Countersink Washer Set for #10 Flat Head Socket Screws Harley-Davidson - Chrome Plated
$13.94

Colony #9826-4 Smooth Front Axle Nut & Spacer Kit 1984-1996 Harley-Davidson FXST/FXSTC/FXSTB 1984-1994 FXDWG/FLT - Chrome Plated
$31.87

Colony #8911-5 Transmission Shifter Cover Cap Head Screw Kit 1987 Harley-Davidson FX/FL - Chrome Plated
$17.52

Colony #8910-5 Transmission Shifter Cover Acorn Head Screw Kit 1980-1987 Harley-Davidson FX/FL - Chrome Plated
$17.52

Colony #8909-13 Transmission Side Cover Allen Head 1987-2006 Harley-Davidson FX/FL/Softail 1991-2005 Dyna - Chrome Plated
$28.42

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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