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 #3252-6 Locking Exhaust Pipe Bolt Kit 1966-1984 Harley-Davidson Shovelhead - Chrome Plated
8 reviews $27.50

Colony #2916-2 Starter Shaft Nut and Spacer Kit 1965-1969 Harley-Davidson FL
2 reviews $27.50

Colony #2519-2 Front Axle Smooth Covers 1991-2003 Harley-Davidson Dyna 1988-2007 Sportster - Chrome Plated
1 review $27.50

Fast Eddy Co. No. 49 Neck Cup Removers
5 reviews $54.95

Cycle Standard Oil Filter for Harley-Davidson XL FXR Softail Touring Models and Buell - Chrome - OEM #63805-80A 63796-77A
8 reviews $13.62

Colony #2070-1 Oil Line Fitting Chrome 1/8 NPT Thread for 3/8 inch Hose OEM #63533-41 - Chrome Plated
6 reviews $4.54

Colony #9515-2 Rear Axle Adjusting Screw 1993-1999 Harley-Davidson FXST OEM #47579-93 - Chrome Plated
1 review $18.16

Colony #3168-16 Footboard Mounting Kit 1965-69 Harley Davidson Big Twins — Colony #3168-16 Footboard Mounting Kit 1965-1969 Harley-Davidson Big Twins - Parkerized
1 review $54.45

Lowbrow Customs 39mm Low Profile Fork Caps - Brass

14 $54.22

Colony #2260-2 Pike Nut Rear Axle Covers 1989-2004 Harley-Davidson XL 1991-2005 Dyna - Chrome Plated
2 reviews $54.14

Cycle Standard Transmission Sprocket Spacer OEM# 33344-94
1 review $7.67

Colony #3663-10 Disc Rotor Allen Screw & Nut Kit 1979-1991 Harley-Davidson XL/FX (Spoked Wheel) - Chrome Plated
$17.88

Cycle Standard Screw-In Harley Stock Style Non-Vented Gas Cap - Left Side - 1982-1995 - Chrome
$26.75

Cycle Standard Chrome Rear Seat Mounting Bracket
$26.64

Cycle Standard Headlight Visor - 7" Headlight - Black - Replaces OEM #69734-05
$26.55 $35.40

Cycle Standard Headlight Visor - 7" Headlight - Chrome - Replaces OEM #69733-05
$26.55 $35.40

Cycle Standard Replacement Oil Tank Cap Harley-Davidson OEM #62644-84T
7 reviews $13.22

Colony #8834-10 Sprocket Nut & Bolt Kit Allen Head 1973-Up Harley-Davidson Big Twin/XL - Spoked Wheel - Chrome Plated
1 review $26.40

Cometic Gasket Inc. Cam Change Gasket Kit - 1993-99 Harley-Davidson Big Twin
$26.20

Cometic Gasket Inc. Cam Change Gasket Kit - 1970-92 Harley-Davidson Big Twin
$26.20

Colony #9893-18 Gas Tank Mounting Kit 1937-1975 Harley-Davidson Big Twin 1972-1972 FX - Parkerized
3 reviews $17.42

Colony #8707-6 Tappet Oil Screen/Oil Pump Check Valve/Relief Valve Plug Set 1981-Up Harley-Davidson Big Twin OEM #26263-80 - Chrome Plated
4 reviews $26.07

Cycle Standard Neck Post Bearing & Race Set - Imported
$12.99

Colony #3014-34 Stock Fastener Motor Case Kit 1948-1964 Harley-Davidson Panhead - Parkerized
2 reviews $51.70

Colony #3013-34 Stock Fastener Motor Case Kit 1940-1947 Harley-Davidson Knucklehead - Parkerized
$51.70

Colony #8135-34 Motor Case Kit Stock 1948-1964 Harley-Davidson Panhead - CAD Plated
2 reviews $51.70

Colony #3295-16 Spotlight Mounting Kit 1949-1978 Harley-Davidson Big Twins - CAD Plated
1 review $16.94

Colony #9932-8 Intake Manifold to Cylinder Head Allen Kit 1995-Up Harley-Davidson Big Twins/XL
2 reviews $6.33

Colony #2867-1 Rear Axle Spacer 1936-1957 Harley-Davidson Big Twins - Chrome Plated
$25.30

Colony #7503-1 Oversized Drain Plug 1965-Up Harley-Davidson Big Twins 1967-Up Sportster - Chrome Plated
$10.04

#2399-2 Stem Nut Stock Zinc OEM 45718-71 Harley FX FXR 71-87 XL 78-87 — Colony #2399-2 Stem Nut Stock 1971-1987 Harley-Davidson FX/FXR 1978-1987 XL - Zinc Plated
5 reviews $16.70

Colony #9708-18 Rear Fender Mounting Kit 1936-1957 Harley-Davidson Big Twin - Chrome Plated
1 review $50.08

The Rough Trade Passenger Peg Mounts For Harley-Davidson Duo-Glides
$27.69

Colony #8156-30 Primary Cover Screw Kit 1936-1964 Harley-Davidson Big Twins - CAD Plated
$25.00

Colony #9692-4 Rear Axle Nut and Lock Kit - 1930-1972 Harley-Davidsons Knucklehead/Panhead/Shovelhead - Parkerized
3 reviews $24.98

Colony #8161-4 Rear Axle Nut and Lock Kit - 1930-1972 Harley-Davidson Knucklehead/Panhead/Shovelhead - CAD Plated
$24.98

Colony #9601-10 Inner Primary Cover Rear Bolt Kit 1936-1964 Harley-Davidson Big Twin - Parkerized
3 reviews $12.45

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

Colony #9854-28 Upper & Lower Motor Mount Kit 1984-1999 Harley-Davidson Softail - Chrome Plated
2 reviews $49.25

Colony #8739-10 Disc Brake Rotor Buttonhead Bolt & Nut Kit Harley-Davidson FL/FX/XL - Chrome Plated
2 reviews $16.38

Colony #8738-10 Disc Brake Rotor Bolt & Nut Kit Harley-Davidson FL/FX/XL - Chrome Plated
3 reviews $16.38

Colony #8708-8 Lifter Base Screw Kit 1976-Up Harley-Davidson Big Twin - Chrome Plated
2 reviews $16.26

Colony #8919-19-P Primary Cover Smooth Allen Kit 1989-2006 Harley-Davidson Softail 1991-2005 Dyna - Chrome Plated
2 reviews $48.73

Colony #2593-5 Front Brake Control Wire Lower Connection Kit 1928-1948 Harley-Davidson Big Twins 1928-1950 45s - Parkerized
4 reviews $24.20

Colony #3049-7 Chain Oiler Adjusting Screw Kit 1932-E1950 Harley-Davidson Twins 1932-1957 45's - Parkerized
$12.09

Colony #2541-19 Luggage Carrier Mounting Kit 1950-1953 Harley-Davidson Big Twin - Parkerized
1 review $24.04

Colony #3674-10 Sprocket Bolts Knurled 1979-1990 Harley-Davidson XL 1993-1998 Big Twins - Chrome Plated
$24.01

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

Colony #9664-8 Linkert Carb Mounting Screws Harley-Davidson OEM #27424-48 - Parkerized
4 reviews $9.56

Cycle Standard Headlight Visor - 5-3/4" Headlight - Chrome - Replaces OEM #69738-05
1 review $47.59

Cycle Standard 5 Post Ignition Key Switch Replaces Harley-Davidson OEM #71500-36T - Black Bezel
10 reviews $47.19

Lowbrow Customs Harley-Davidson Shovelhead Tune & Service Video Workshop Manual DVD with Frank Kaisler
42 reviews $5.19 $10.19

Colony #9401-1 Aluminum Transmission Filler Plug 1958-1980 Harley-Davidson Big Twin
2 reviews $15.52

Colony #8796-4 Handlebar Clamp Allen Screw Kit 1982-Up Harley-Davidson FX/XL - Chrome Plated
8 reviews $9.31

Colony #7500-2 Oversize Timing Plug/Oil Tank Plug & Tap Kit 11/16-16 Thread - Chrome Plated
$46.35

Colony #3578-28 Footboard Pad Rivets 1941-1965 Harley-Davidson All Models
$15.40

Colony #2920-2 Nut & Lock Kit 1936-Up Harley-Davidson Big Twin Kickstarter 1936-1979 Bg Twin 4 Speed Countershaft
5 reviews $7.70

Lowbrow Customs Lowbrow Customs Spark Plug Wire Set 2007-2021 Harley-Davidson XL 1999-2006 FLH/FLT
$22.99

Thrashin Supply Co. ARP Foot Peg Hardware Kit for Harley-Davidson FXR/XL/Dyna
$45.95

Cycle Standard Shift Lever - 1974-1984 Harley-Davidson FL 1980-1986 FXWG (With Splines) - Chrome - OEM #34606-74
$22.97

Colony #2430-2 Transmission Mainshaft Bearing Nut and Lock Tab 1936-1985 Harley-Davidson Big Twin - Parkerized
3 reviews $15.31

V-Twin Manufacturing Clutch Release Arm Harley-Davidson 1971-1978 FX 1968-1978 FL
$45.80

Cycle Standard Throttle Idle Cable OEM #55355-92 Harley Dyna 1992-1995 +4 inch Extended
$22.88

Colony #9978-2 Custom Fork Stem Bolt 1986-Up Harley-Davidson XL/FXR/FXD/FLST - Chrome Plated
3 reviews $22.80

Drag Specialties Shifter Linkage - Chrome - 1986-2017 Harley-Davidson FLS/_FXST/_FXS/_FLST
$45.53

Colony #9100-8 Cylinder Base Nut Set 1978-1984 Harley-Davidson Shovelhead OEM #16838-78 - Chrome Plated
2 reviews $22.75

Colony #3451-4 Lower Shock Mounting Kit 1973-1984 Harley-Davidson FLH 1973-1986 FX - Zinc Plated
$9.08

Colony #9928-20 Motor Mounting Allen Kit 1988-2006 Harley-Davidson FLT/FLHT/FXR/FXRS - Chrome Plated
1 review $44.89

Colony #2123-4 Handlebar Riser Cupped Washers 1973-Up Harley-Davidson All Models - Chrome Plated
3 reviews $14.89

Colony #2095-4 Handlebar Riser Allen Bolt Kit 1/2-13 x 2-3/4" Harley-Davidson FXST/FLST Models - Chrome Plated
2 reviews $14.89

Colony #3662-5 Disc Rotor Allen Screw & Nut Kit 1979-1991 Harley-Davidson XL/FX (Cast Wheel) - Chrome Plated
$14.85

Colony #9912-2 Fork Tube Cap 1978-Up Harley-Davidson FL/FXWG/Softail - Chrome Plated
$22.09

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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