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 #2279-16 Head Bolt Kit 12 Point Bolts L1984-E1985 Harley-Davidson Evo - Chrome Plated
$33.84

Colony #2306-16 Electrical Terminal Plate 1959-1969 Harley-Davidson Big Twin
$33.84

Colony #8607-6 Rear Axle Cap Kit 1973-Up Harley-Davidson Big Twin 1979-Up Sportster XL - Chrome Plated
$33.67

Colony #8807-17 Motor Mounting Kit Upper & Lower 1970-1984 Harley-Davidson Big Twin - Zinc Plated
2 reviews $33.67

Colony #3636-4 Kickstand Leg Stop Kit 1936-1984 Harley-Davidson Big Twins - CAD Plated
$16.78

Colony #3682-16 Lower Motor Mount Kit 1958-1965 Harley-Davidson OHV Big Twins - Chrome Plated
$33.55

Colony #9836-5 Chrome Countersink Washer Set for 3/8" Flat Head Socket Harley-Davidson - Chrome Plated
1 review $16.73

Colony #9825-4 Custom Ribbed Front Axle Nut & Spacer Kit 1984-1996 Harley-Davidson FXST/FXSTC/FXSTB 1984-1994 FXDWG/FLT - Chrome Plated
$33.31

Colony #8876-5 Seat Bar Bushing Set 1965-1980 Harley-Davidson Big Twin - CAD Plated
1 review $33.31

Colony #8762-17-P Primary Cover Smooth Allen Screw Kit 1971-Up Shovelhead/Evo 4 Speed - Chrome Plated
$33.17

Colony #2847-3 Wheel Bearing Locknut Seal Kit 1967-1972 Harley-Davidson FL/FLH 1971-1972 FX 1967-1972 Servi-car - CAD Plated
1 review $33.00

#3099-2 Starter Clutch to Mainshaft Nut Lockwasher Kit Harley 1941-67 FL FLH — Colony #3099-2 Starter Clutch to Mainshaft Nut Lockwasher Kit 1941-1967 Harley-Davidson FL/FLH
2 reviews $11.00

Colony #3464-1 Choke Lever 1938-1965 Harley-Davidson Big Twins - Parkerized
$32.99

Colony #3059-5 Foot Clutch Lever Friction Disc Kit 1941-1978 Harley-Davidson Big Twins - Parkerized
2 reviews $32.99

Colony #9626-16 Lower Motor Mount Kit 1930-1936 Harley-Davidson VL All 45 's - Parkerized
$32.95

Colony #2147-8 Handlebar Riser Cover Mounting Studs & Chrome Acorns 1949-1959 Harley-Davidson Big Twin - Chrome Plated
1 review $32.89

Cycle Standard Derby Cover - Chrome - 1970-1998 Harley-Davidson Big Twins
$32.74

Colony #9869-24 Inner Primary Mounting Kit 1980-1985 Harley-Davidson FL/FX
$32.50

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

Colony #8831-10 Disc Brake Rotor to Hub Screw & Nut Kit 1978-1983 Harley-Davidson FXWG - Chrome Plated
1 review $16.01

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

Colony #3794-2 Tail Lamp Speed Nut & Screw Kit 1955-1972 Harley-Davidson FL/FLH/FX/XL
$15.95

Colony #2998-5 Rear Brake Switch Pull Kit 1940-1957 Harley-Davidson Big Twins - CAD Plated
$31.89

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 #9975-4 Front Axle Nut Smooth Spacer Kit 1995-1999 Harley-Davidson XL/Dyna - Chrome Plated
$31.87

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

Colony #3445-8 Rocker Shaft End Plug & Cap Nut Kit 1971-Up Harley-Davidson Shovelhead 1971-1985 Sportster
2 reviews $31.81

Colony #9913-2 39mm Fork Tube Caps 1988-Up Harley-Davidson FX/XL - Chrome Plated
1 review $31.50

Colony #2331-20 Battery Box Mounting Kit 1965-1984 Harley-Davidson FX/FL
$15.73

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

Colony #8916-17-P Primary Cover Smooth Allen Screw Kit 1985-Up Harley-Davidson FXR 1985-1999 FLT 5 speed - Chrome Plated
2 reviews $31.13

Colony #3683-16 Lower Motor Mount Kit 1958-1965 Harley-Davidson OHV Big Twins - CAD Plated
$30.80

Colony #2771-4 Kick Starter Pedal Mounting Kit 1917-Up Harley-Davidson Davidson - Chrome Plated
2 reviews $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

Colony #9011-5 Linkert Carb Support Bracket 1930-1938 Harley-Davidson OEM #1110-33 - Parkerized
$15.40

Cycle Standard Rubber Battery Strap 1991-17 Harley-Davidson FXST FLST 80-92 FLT 78 XLCR 79 XL
3 reviews $6.14

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

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

Colony #8014-2 Rear Chain Adjuster Screws - 1936-1972 Harley-Davidson Knucklehead/Panhead/Shovelhead - CAD Plated
2 reviews $15.29

Colony #2058-1 Fork Stem Cap 1980-Up Harley-Davidson FXST/FXWG - Chrome Plated
$15.27

Colony #7111-2 Upper Spring Retainers - 1936-1948 Harley-Davidson Big Twin Spiringer 1932-52 45's 1953-54 Servicar - Chrome Plated
$15.27

Lowbrow Customs Fork Nut Wrench Harley-Davidson Big Twin & Sportster Fork Tube Caps
9 reviews $30.51

Colony #8858-8 Cylinder Base Stud Set 1954-1985 Harley-Davidson K/XL OEM #16830-54 & 16830-72
2 reviews $30.42

Colony #2649-9 Top Motor Mount Hardware Kit 1936-1947 Harley-Davidson Big Twin - Parkerized
$15.13

James Gaskets Cam Change Gasket Kit - 1993-99 Harley-Davidson 80 inch Big Twin
$30.10

Colony #2819-8 Horn Terminal Board Kit 1942-1946 Harley-Davidson All Models
$30.00

Unity Manufacturing Linkert Intake Leak Tester - 3 Bolt
2 reviews $30.00

Colony #3656-1 Linkert Main Nozzle 1933-1958 Harley-Davidson Big Twin/45's
1 review $30.00

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

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

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

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

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 #3614-2 Horn Bracket Lockwasher 1949-1954 Harley-Davidson All Models
$14.85

Cycle Standard Steel Clutch Plate Set 1991-Up Harley-Davidson Sportster 90-97 Big Twin
$29.49

Cycle Standard Screw-In Harley Stock Style Non-Vented Gas Cap - Left Side - 1996 & up - Chrome
$29.43

Colony #7813-8 High Crown Acorn Cylinder Base Nut Set 1978-1984 Harley-Davidson Shovelhead - Chrome Plated
2 reviews $29.34

V-Twin Manufacturing Polished Shifter Rod 1991-2005 Harley-Davidson FXD
$29.20 $41.71

James Gaskets Transmission Top Cover Gasket - 1984-1998 Harley-Davidson Big Twin 5-Speed
2 reviews $9.68

Colony #3333-4 Spacers Harley-Davidson OEM #91089-58 - 4 Pack - Zinc Plated
$9.68

Colony #3146-1 Breaker Point Eccentric Screw 1947-70 Harley Davidson — Colony #3146-1 Breaker Point Eccentric Screw Harley-Davidson OEM #30507-47A
$9.68

Colony #9633-50 Flatwashers Harley-Davidson FL/FX/XL OEM #6099 - Chrome Plated
7 reviews $14.52

Colony #8750-14 Transmission Top Cover Allen Screw 1936-1964 Harley-Davidson Big Twin - Chrome Plated
$28.97

Colony #8152-2 Generator Screw Kit 1936-1957 Harley-Davidson Big Twin - CAD Plated
3 reviews $7.17

Colony #2163-2 Rear Axle Covers Smooth 2002-2004 Harley-Davidson VRSC - Chrome Plated
$28.60

Cycle Standard Inner Shift Lever 1982-Up Harley-Davidson FL Models - Black - OEM #33718-82B
$28.57

Cycle Standard Clutch Cable OEM #38618-52 1952-1967 Harley-Davidson FL/EL
1 review $28.45

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

Colony #8916-17 Primary Cover Allen Head Screw Kit 1985-Up Harley-Davidson FXR 1985-1999 FLT - Chrome Plated
3 reviews $28.42

Cycle Standard Oil Filter for Harley-Davidson Dyna Softail and Touring Models - Chrome - OEM #63798-99A 63731-99
8 reviews $14.19

James Gaskets Kicker Cover Gasket 1936-1986 Harley-Davidson Big Twin 4 Speeds OEM# 3329536
$4.00

Colony #3047-3 Oil Line Vent Line Fittings Pre-1965 Harley-Davidson Twins - Parkerized
$13.94

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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