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 #8114-1 Timing Plug/Oil Tank Plug OEM #704 1952-1969 Harley-Davidson FL and XL -Chrome Plated
1 review $8.78

Colony #8764-2 Point Cover Allen Head Screws 1970-1978 All Harley-Davidson - Chrome Plated
$4.38

Colony #3704-2 Brake Caliper Bleeder Screws 2009-Up Harley-Davidson Touring 2008-Up V-Rod - Black Oxide
1 review $8.47

Colony #3246-1 Oil Pressure Switch Nipple 1958-1969 Harley-Davidson Big Twins - CAD Plated
1 review $8.47

Colony #9803-4 Triple Tree Pinch Bolts Kit Harley-Davidson FL and Wideglide - Chrome Plated
$8.36

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

Colony #2504-1 Horn Wire Clip 1938-1948 Harley-Davidson Big Twin 1940-1957 45's/Servi-car - Parkerized
1 review $7.87

Colony #3778-1 Clutch Dissasembly Washer Harley-Davidson Knuckleheads/Panheads/Shovelheads
1 review $7.70

Colony #2505-1 Spark Plug Front Cable Clamp 1936-1969 Harley-Davidson 74 OHV - CAD Plated
$7.70

Colony #3357-3 Carburetor Mounting Screws 1930-1936 Harley-Davidson VL - CAD Plated
$7.66

Colony #2455-3 Carburetor Mounting Screws 1937-1939 Harley-Davidson Big Twins 1940 WL/WLD- Parkerized
$7.66

Colony #3306-2 Mainshaft Oil Seal Cork Washer & Main Drive Gear Spacer Key 1936-1979 Harley-Davidson Big Twins
$7.26

Colony #3265-1 Upper Bearing Dust Shield 1949-Up Harley-Davidson Big Twin 4-Speed Pre-2017 Softail Pre-2005 Dyna/FXR to 2005 1980-2013 Touring 1982-2003 Sportster - Zinc Plated
5 reviews $7.26

Colony #2624-2 Oil Pump Cover Oil Pipe Nipple 1950-1964 Harley-Davidson Big Twins - CAD Plated
3 reviews $7.26

Colony #2598-1 Carburetor Needle Valve Lever Screw 1927-1965 Harley-Davidson Linkert Carburetors - CAD Plated
$7.26

Colony #2586-1 Timer Cable Clamp 1949-1964 Harley-Davidson Big Twin - 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 #9954-5 Point Cover Mounting Button Torx Kit 1999-Up Harley-Davidson Twin Cam Dyna/FLT 2000-Up Softail - Chrome Plated
2 reviews $7.17

Colony #8119-1 Starter Crank Pin Stud 1936-Up Harley-Davidson Big Twins - Chrome Plated
2 reviews $7.17

Colony #3206-2 Fender Brace Bolt Kit 1941 - 1957 Harley-Davidson Big Twins and 45's — Colony #3206-2 Fender Brace Bolt Kit 1941-1957 Harley-Davidson Big Twins/45's - Chrome Plated
1 review $6.66

Colony #8116-1 Motor Case Drain Plug/Oil Pump Body Plug 1911-1970 Harley-Davidson Big Twin Cases/1968-1984 Oil Pump Body - Chrome Plated
$6.60

Colony #3556-1 Sprocket Shaft Seal 1940-1954 Harley-Davidson Big Twins
$6.60

Colony #2631-8 Front Crash Bar Mounting Kit 1951-1954 Harley-Davidson Big Twin - CAD Plated
$6.36

Colony #3115-3 Headlamp Mounting Kit 1935 - 1948 Harley-Davidson Big Twins and 45's — Colony #3115-3 Headlamp Mounting Kit 1935-1948 Harley-Davidson Big Twins/45's - CAD Plated
$6.05

Colony #2878-3 Starter Crank Pin Stud Kit 1936-Up Harley-Davidson Big Twins - CAD Plated
2 reviews $6.05

Cycle Craft #200 Main Jet - 1988-2006 Keihin CV Carburetor
$5.99

Cycle Craft #160 Main Jet - 1988-2006 Keihin CV Carburetor
$5.99

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 #9758-2 Fork Slider Drain Screws Button Head Allen 1977-1984 Harley-Davidson FL 1977-1984 FXWG/FLT 1980-Up Softail - Chrome Plated
5 reviews $5.95

Drag Specialties Kickstarter Ratchet Gear Key 1940-1986 Harley-Davidson Big Twin 4 Speeds OEM# 3339350
$1.95

Colony #2520-1 Timer Wire Clip 1938-1965 Harley-Davidson Big Twin - CAD Plated
1 review $5.57

Colony #3423-1 Oversized Motor Case Drain Plug Oil Pump Body Plug 7/16-20 1936-1970 Harley-Davidson Big Twin Cases 1937-Up 45 Cases 1968-1984 Oil Pump Body - Parkerized
$5.50

Colony #3205-2 CAD Plated Fender Brace Bolt Kit 1941-57 Harley Davidson Big Twin and 45 — Colony #3205-2 Fender Brace Bolt Kit 1941-1957 Harley-Davidson Big Twin/45's - CAD Plated
$5.45

James Gaskets Points Cover Gasket 1971-1978 Harley-Davidson Big Twin
2 reviews $1.34

Colony #9717-1 Starter Crank Pin Stud 1936-Up Harley-Davidson Big Twin - Parkerized
$5.18

Colony #8109-1 Long Oil Pump Nut Pre-1967 Harley-Davidson Big Twins - CAD Plated
$5.18

Colony #8765-2 Point Cover Allen Head Screws 1979-Up All Harley-Davidson - Chrome Plated
3 reviews $4.38

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

Colony #2733-2 Fork Slider Drain Screws 1949-1977 Harley-Davidson FL - CAD Plated
$3.99

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

Colony #9963-1 Stem Nut Washer 1971-1985 Harley-Davidson FX 1979-1985 XL 79-85 - Chrome Plated
$2.78

Gasbox Lower Rear Fender Mount for Gasbox Reno Frames
$28.00

Gasbox Voltage Regulator Bracket for Gasbox Reno Frames
$34.95

Gasbox Ignition Switch Bracket for Gasbox Big Twin Frames
$24.95

Fast Eddy Co. No. 50 Flywheel Rebuilding Fixture
$399.95

Fast Eddy Co. No. 68 Plumber Nut Intake Wrench 2" for 1936-1939 Harley-Davidson EL Medium Style Intakes
$69.95

Fast Eddy Co. No. 13-18 GO / NO-GO Gauge Pin Set
$374.95

LCFabrications Micro Switch Housing - Clutch Side - Single - Black - 1982-1995 Harley-Davidson
$70.00

LCFabrications Micro Switch Housing - Brake Side - Single - Black - 1982-1995 Harley-Davidson
$70.00

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

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

Gasbox Reno Full Rigid Chopper Frame 1936-1999 Harley-Davidson Big Twin 4 Speed - 2" Up - Frisco Tank Mounts - Horseshoe Oil Tank
$1,799.00

Lowbrow Customs Spring Retainer & Acorn Nut Set - Chome - for Straton Springers & 1936-48 Harley-Davidson Big Twin Springers 1936-52 45's
$19.60

Cycle Electric Alternator Kit CE-74TR 1999-2003 Harley-Davidson Dyna Models
$537.91 $575.81

Cycle Electric Alternator Kit CE-73TR 2001-2006 Harley-Davidson Softail Models
$531.12 $568.54

Cycle Electric Alternator Kit CE-71AR 1980-1988 Harley-Davidson FLH/FLT/FXR With 5 Speed Rubber Mount Motors
$571.48 $611.75

Cycle Electric Alternator Kit CE-62ANBR 38 Amp for 1991-1998 Harley-Davidson Dyna 1984-1999 Softail Models With No Battery
$483.86 $517.96

Cycle Electric Alternator Kit CE-61AR for 1980-1988 Harley-Davidson FLH/FLT/FXR With 5 Speed Rubber Mount Motors
1 review $476.96 $510.57

Gasbox Heavy Duty Universal 4 Speed Transmission Mounting Plate
$59.95

Cycle Standard 39mm Damper Tube Kit - 9" - 1997-2003 Harley-Davidson Sportster XL 1987-1994 FXR 1991-1994 FXD OEM# 45925-97
$69.00

Cycle Standard Replacement 41MM Fork Springs 1986-1999 Harley-Davidson FLST OEM# 45931-86
$44.99

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

Lowbrow Customs Weld-On Hardtail Frame 1958-1984 Harley-Davidson Panhead & Shovelhead
3 reviews $699.99

Cycle Electric CE-546 Replacement Regulator for Harley-Davidson Model 61 6 Volt Generators
$186.19 $199.31

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-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 Standard Single Gauge Bracket - Chrome - 1995-2011 Harley-Davidson XL883 1995-2005 FXD Models
$88.99

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

James Gaskets Primary Cover & Inspection Cover Gasket Kit 1984-1986 Harley-Davidson FL/FLH/FX/FXE/FXWG 1984-1988 Softail
$55.23

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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