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 #9608-2 Oil Pump Relief Valve Plug 1968-1980 Harley-Davidson Big Twins - CAD Plated
2 reviews $11.14

Colony #9606-2 Oil Pump Relief Valve Plug 1954-1967 Harley-Davidson Big Twin - CAD Plated
$11.14

Colony #3756-3 Carburetor Choke Screw/Air Intake Shaft Stop Ball & Spring 1933-1965 Harley-Davidson
$11.00

Colony #3734-4 Tombstone Tail Light Studs 1947-1954 Harley-Davidson - CAD Plated
$11.00

Colony #8780-4 Pushrod Tappet Adjuster Locknuts Harley-Davidson OHV Big Twins/45's/XL/K models OEM #18570-38
4 reviews $11.00

Colony #3791-4 3/4 OD x 5/16" ID x 1/2" Spacers Harley-Davidson OEM #4 52104-38/3209-38 - 4 Pack - CAD Plated
$10.89

Colony #3790-4 3/4 OD x 5/16" ID x 1/2" Spacers Harley-Davidson OEM #4 52104-38/3209-38 - 4 Pack - Parkerized
$10.89

Colony #9908-4 Fork Slider Drain Screws 1952-1972 Harley-Davidson K/XL/FX - CAD Plated
$10.76

Colony #2526-4-P Rear Master Cylinder Mounting Kit Smooth Allen 1984-1985 Harley-Davidson FX - Chrome Plated
$10.44

Colony #3705-2 Brake Caliper Bleeder Screws 2009-Up Harley-Davidson Touring 2008-Up V-Rod - Chrome Plated
$10.29

Colony #8796-4-P Handlebar Clamp Smooth Allen Screw Kit 1982-Up Harley-Davidson FX/XL - Chrome Plated
$10.04

Colony #9684-10 Circuit Breaker & Relay Screw Kit 1936-1984 Harley-Davidson OHV Twins - Parkerized
1 review $10.04

Colony #3299-2 Front Brake Cable Nut Washer 1930-1940 Harley-Davidson Big Twin/45's/Servi-car 1930-1934 Singles - CAD Plated
$9.99

Colony #7819-4 Shifter Rod End Bolt Kit All 1936-1954 Harley-Davidson with Handshift 1951-64 Harley-Davidson with Footshift - CAD Plated
$9.96

Colony #3762-5 Dash Cover Mounting Kit 1936-1946 Harley-Davidson Twins - Parkerized
$4.95

Colony #3714-3 Instrument Panel Cover Plate Right Side 1939-1946 Harley-Davidson All Models - Parkerized
1 review $9.90

Colony #3658-8 Circuit Breaker To Coil Wire Fastener Assembly 1949-1964 Harley-Davidson Twins/K/KH/Sportster
$9.90

Colony #2544-1 Foot Clutch Lever Bracket Spring Stud 1936-1939 Harley-Davidson Big Twin
$9.75

Colony #3671-1 Starter Solenoid Plunger Cover 1965-1988 Harley-Davidson Big Twins 1967-1980 XL
$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 #3022-3 Front Axle Nut and Washer Kit 1972-Up Harley-Davidson Wideglides - CAD Plated
$9.68

Colony #2927-3 Front Axle Nut and Washer Kit 1973-Up Harley-Davidson FL/XL - CAD Plated
1 review $9.68

Colony #2828-1 Crankcase and Chain Housing Drain Plug 1965-1984 Harley-Davidson FL 1971-1984 FX 1967-1992 XL - Chrome Plated
$9.68

Colony #2728-1 Chain Housing Top or Shifter Lever Pivot Screw 1965-1984 Harley-Davidson FL 1971-1984 FX - Chrome Plated
$9.68

Colony #9524-1 Oil Pump Check Valve Plug 1936-1980 Harley-Davidson Big Twin 1937-Up UL/45s - CAD Plated
$9.56

Colony #8930-8 Linkert Carb Mounting Screws Harley-Davidson OEM #47248-48 - CAD Plated
1 review $9.56

Colony #8154-2 Generator Mounting Screws 1958-1969 Harley-Davidson Big Twins - CAD Plated
2 reviews $9.56

Colony #9691-2 Seat Post Rod Lock Nut & Washer 1925-1981 Harley-Davidson All Models (Except FX/XL) - Parkerized
6 reviews $9.35

James Gaskets Generator Mounting Gasket 1940-1957 Harley-Davidson Big Twin
1 review $1.14

Colony #8759-5 Disc Brake Rotor to Hub Screw Kit 1974-1977 Harley-Davidson FX/XL - Chrome Plated
$8.93

Colony #9503-1 Timing & Oil Tank Plug 1938-1951 Harley-Davidson All Models OEM# 2326-38 - CAD Plated
$8.80

Colony #9404-1 Oversize Harley-Davidson Timing & Oil Tank Plug - CAD Plated
1 review $8.80

Colony #3603-12 Pushrod Cover O-Ring Seals 1979-1985 Harley-Davidson Sportster XL
$8.78

Colony #9732-7 Foot Brake Lever & Bracket Mounting Kit CAD Harley-Davidson 1936-71 - Chrome Plated
$8.78

Colony #9656-8 Transmission Top Cover Screw Kit 1979-1985 Harley-Davidson Big Twin - Chrome Plated
1 review $8.78

Colony #8483-2 Dash Center Screw Kit 1947-1967 Harley-Davidson - Chrome Plated
1 review $8.78

Colony #2965-3 Tombstone Tail Light Cover Stainless Steel Screw Kit 1947-1972 Harley-Davidson Big Twins
2 reviews $4.24

Colony #9933-12 Intake Manifold to Cylinder Head Allen Kit 1986-1987 Harley-Davidson XL
$8.36

Colony #9877-2 Oil Screen Plug 1970-1980 Harley-Davidson Big Twins - CAD Plated
$7.96

Colony #9782-4 Triple Tree Pinch Allen Bolt All Harley-Davidson FL and Wideglide - Chrome Plated
$7.96

Colony #3334-1 Fuel Strainer Hose Nipple 1932-1938 Harley-Davidson Twins - CAD Plated
1 review $7.87

Colony #3304-2 Front Brake Cable Tube Fitting 1949-1971 Harley-Davidson FL - CAD Plated
$7.87

James Gaskets Bearing Housing/Case Gasket - Silicone - 1984-1998 Harley-Davidson Big Twin 5-Speed
$7.86

Colony #3645-5 Ignition Coil Mounting Plate Kit 1985-2003 Harley-Davidson XL 1994-2001 Touring 1991-1999 Softail 1991-1994 Dyna - Zinc Plated
$7.70

Cycle Standard Kickstand Bumper Rubber - 1985-2000 Harley-Davidson Touring Models OEM #50059-85A
2 reviews $7.62

Colony #3343-2 Carburetor Bowl Drain Plug 1939-1965 Linkert
$7.57

Colony #3171-12 Rubber Pushrod Cover Seals 1936-79 Harley Davidson Knucklehead Sportster — Colony #3171-12 Rubber Pushrod Cover Seals 1936-1947 Harley-Davidson Knucklehead 1957-1979 Sportster
4 reviews $7.45

Colony #3597-1 Spark Control Cable Clamp 1949-1964 Harley-Davidson Big Twins
$7.26

Colony #2727-1 Chain Housing Top or Shifter Lever Pivot Screw 1965-1984 Harley-Davidson FL 1971-1984 FX - CAD Plated
1 review $7.26

Colony #2629-4 Speedometer Mounting Kit 1936-Up Harley-Davidson Stewart-Warner Speedometers - CAD Plated
1 review $3.63

Colony #9670-10 Star Wheel Hub Outer Screw Kit 1936-1966 Harley-Davidson - Parkerized
1 review $7.17

Colony #3646-5 Ignition Coil Mounting Plate Kit 1965-1984 Harley-Davidson FL/FX/XL - Zinc Plated
$6.60

Colony #3637-2 Oil Line Tube Seals 1992-1999 Harley-Davidson Big Twins
$6.60

Colony #3329-4 Exhaust Port Nuts 1984-1999 Harley-Davidson Big Twin 1986-Up XL 1999-Up Twin Cam - Chrome Plated
$6.49

Colony #9842-8 Rocker Shaft End Nut Kit 1936-1947 Harley-Davidson Knucklehead - Parkerized
$6.38

Colony #9657-8 Transmission Top Cover Screw Kit 1979-1985 Harley-Davidson Big Twin - Zinc Plated
$6.38

Cycle Standard Kickstand Bumper Rubber - 1986-2000 Harley-Davidson Sportster 1989-06 Softail OEM #62123-66
$6.15

Colony #3696-4 Exhaust Port Nuts 1984-1999 Harley-Davidson Big Twin 1986-Up XL 1999-Up Twin Cam - Chrome Plated
1 review $6.05

Colony #2732-1 Carburetor Bowl Valve Cover Cap Brass 1933-1952 Harley-Davidson 45s 1933-1948 Sidevalve 1953-1954 Servi-car 1952-1956 K/KH
$6.05

Colony #8402-2 Point Cover Acorn Head Screws 1971-Up Harley-Davidson Shovelhead & Sportster - Chrome Plated
3 reviews $5.96

Colony #2324-2 Air Cleaner Cover Mounting Screws 1966-1977 Harley-Davidson Big Twin 1956-1977 XL - Chrome Plated
1 review $5.95

Colony #9675-1 Motor Case Drain Plug 1911-1970 Harley-Davidson 1968-1984 Oil Pump Body - Parkerized
1 review $5.50

Colony #3761-5 Dash Cover Mounting Kit 1936-1946 Harley-Davidson Twins - CAD Plated
$4.95

#3100-4 Battery Box Lid Wing Nuts Harley-Davidson 66387-26 — Colony #3100-4 Battery Box Lid Wing Nuts Harley-Davidson OEM #66387-26
1 review $4.84

Colony #2657-3 Clutch Hub Bearing Plate Springs 1944-1984 Harley-Davidson Big Twins 1944-1973 45's - CAD Plated
$4.84

Colony #8171-8 Cylinder Base Nut Lockwashers All 1930-1977 Harley-Davidson Big Twins - CAD Plated - OEM #7055
$4.76

Colony #3697-4 Exhaust Port Nuts 1984-1999 Harley-Davidson Big Twin 1986-Up XL 1999-Up Twin Cam - Zinc Plated
2 reviews $4.40

Lowbrow Customs Distributor Hold Down Clamp 1952-1970 Harley-Davidson XL 1936-1973 WL
$18.73

Cannonball SSK-R Speedometer Sensor Hole Plug
$66.63

Cannonball Stealthstarter Electric Starter Kit for Rigid Frame Harley-Davidson Big Twins with Baker 6-in-4 Gearboxes
$4,454.00

Cycle Electric Alternator Kit CE-60AR for 1970-1984 Harley-Davidson 4 Speed Solid Mount Motors
$470.33 $503.46

Cycle Electric Alternator Kit CE-22AR for 1970-1988 Harley-Davidson Big Twins
$362.34 $387.87

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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