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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Cycle Standard Drilled Black Brake & Clutch Lever Set for Harley 96-03 Sportster and 96-06 Big Twins
24 reviews $51.80

Colony #8215-18 Head Bolt Washer Kit 1940-1947 Harley-Davidson Alloy 45/74/80 - Chrome Plated
$51.78

Colony #3354-12 Harley-Davidson Windshield Mount Clip Kit 1936-1967 Harley-Davidson Big Twins/Sidecars - Parkerized
$25.58

#3107-16 Front Shock Absorber Upper Mount Kit Harley Springer 1946-57 — Colony #3107-16 Front Shock Absorber Upper Mount Kit 1946-1957 Harley-Davidson Springers - Parkerized
$51.15

Drag Specialties Primary Chain Adjuster Shoe 1965-1999 Harley-Davidson Big Twin 1999-2000 Twin Cam
$16.91

Drag Specialties Wheel Bearings and Races - Replaces Harley-Davidson OEM #43577-67
$50.70

Colony #9923-5 Custom Front Axle Spacer Kit Smooth 1996-1999 Harley-Davidson FLSTF - Chrome Plated
$50.69

Colony #3167-4 Shock Mount Bolt Kit 1984-99 Harley Davidson Softail — Colony #3167-4 Shock Mount Bolt Kit 1984-1999 Harley-Davidson Softail - Zinc Plated
4 reviews $25.30

Colony #2700-1 Linkert High Speed Needle 1950-65 Harley Davidson FL — Colony #2700-1 Linkert High Speed Needle 1950-1965 Harley-Davidson FL - CAD Plated
1 review $25.30

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

Colony #2708-5 Linkert Low Speed Needle Valve 3-1/16 inch Needle 1933-1947 Harley-Davidson
$25.30

Colony #2695-5 Linkert Low Speed Needle Valve 3-1/2 inch 1948-1965 Harley-Davidson Type 1 Heads
$25.30

Colony #2466-5 Oversized Brake Drum Wheel Mounting Bolt Set - 1936-1972 Harley-Davidson Knucklehead/Panhead/Shovelhead - Parkerized
2 reviews $25.30

Cycle Standard Throttle Idle Cable OEM #55355-92 Harley Dyna 1992-1995 +4 inch Extended
$25.17

Colony #2203-8 Safety Guard Mounting Kit 1937-1947 Harley-Davidson Big Twins 1955-1957 Panhead - Parkerized
$25.05

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

Colony #8602-20 Oversize Stroker Upper Pushrod Cover Kit 1940-1947 Harley-Davidson Knucklehead & All Shovelhead - Chrome Plated
1 review $50.08

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

Unity Manufacturing Splined Motor Turning Tool - 1954-1999 Harley-Davidson Big Twins
$25.00

Unity Manufacturing Four Speed Clutch Lockup Tool - BDL/Pro-Clutch
3 reviews $50.00

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

Colony #8113-20 Transmission Side & Clutch Arm Nut Kit Harley-Davidson Big Twin 4 Speeds To 1984 - CAD Plated
2 reviews $9.96

Colony #2809-3 Clutch and Brake Hand Lever Clamp Bushing Kit 1949-1964 Harley-Davidson All Models - CAD Plated
$9.90

Colony #9695-26 Transmission Mounting Kit 1936-1964 Harley-Davidson Big Twin - Parkerized
2 reviews $49.41

Colony #9927-28 Upper & Lower Motor Mounting Allen Kit 1984-1999 Harley-Davidson Softail - Chrome Plated
$49.25

Cycle Standard 41mm Triple Lip Fork Seal Rebuild Kit - 1949-1977 Harley-Davidson FL
$24.45

Cycle Standard Throttle Idle Cable OEM #55355-92 Harley Dyna 1992-1995 - Blacked Out
$16.30 $23.28

Colony #2084-2 Seat Post Bushings 1958-1984 Harley-Davidson Big Twins OEM #47094-58
1 review $24.37

Colony #8226-1 Fork Tube Cap/Plug 1948-1977 Harley-Davidson Hydra-Glide - Chrome Plated
$24.26

Lowbrow Customs Narrow Axle for 39mm Tapered Fork Lowers
$24.04

Cycle Craft #170 Main Jet - 1988-2006 Keihin CV Carburetor
1 review $5.99

Colony #7803-11 Acorn Nut Kickstand Mounting Kit 1936-1986 Big Twin 4 Speeds (Except Softail) - Chrome Plated
5 reviews $23.91

Colony #8761-7 Timing Cover Knurled Allen Screw Kit 1970-1992 Harley-Davidson Shovelhead/Evo - Chrome Plated
2 reviews $11.90

Cycle Standard Screw-In Harley Stock Style Non-Vented Gas Cap - Left Side - 1982-1995 - Black
$23.51

Cycle Standard Cycle Standard 24"" Handlebar Wiring Extension Kit for 1996-2006 Harley Models
10 reviews $46.94

Colony #2921-2 Spring Retainer & Acorn Nut Set 1936-1948 Harley-Davidson Big Twin Springers 1936-1952 45s 1953-1954 Servi-car - Chrome Plated
2 reviews $23.38

Colony #8495-1 1937-1986 Harley-Davidson Big Twin Transmission & Sportster XL Motor Case Drain Plug OEM #707 - CAD Plated
3 reviews $9.35

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

Lowbrow Customs Lowbrow Customs Spark Plug Wire Set 2004-2006 Harley-Davidson XL 1999-2008 FLH/FLT
$22.99

Colony #2425-2 Clutch Pushrod Adjusting Screw Locknut 1941-1984 Harley-Davidson Big Twin - Parkerized
1 review $15.31

Colony #2364-16 Lifter Base Screw Kit 1954-1975 Harley-Davidson Big Twins - Chrome Plated
2 reviews $22.78

Lowbrow Customs Blade Levers - Black - 1996 - 2003 Harley Davidson Sportsters and 1996 - 2017 Dyna / Softail / Touring Models
57 reviews $45.51

Colony #8728-12 Rubberized Cork Pushrod Cover Seals Pre-1979 Harley-Davidson Panhead/Shovelhead
20 reviews $9.08

Lowbrow Customs Blade Levers - Polished - 1996 - 2003 Harley Davidson Sportsters and 1996 - 2017 Dyna / Softail / Touring Models
31 reviews $45.25

Cycle Standard 41mm Fork Seal Rebuild Kit - 1977-1984 Harley-Davidson FL 1980-83 FXWG FLT
$15.00

Colony #8726-8-P Lifter Base Smooth Allen Screw Kit 1976-Up Harley-Davidson Big Twin - Chrome Plated
$14.89

Colony #2139-4 Handlebar Riser Hex Bolt Kit 1/2-13 x 3-3/4" - Chrome Plated
$14.89

Colony #2137-4 Handlebar Riser Hex Bolt Kit 1/2-13 x 3" - Chrome Plated
5 reviews $14.89

Colony #2135-4 Handlebar Riser Hex Bolt Kit 1/2-13 x 2-1/2" - Chrome Plated
1 review $14.89

Colony #9685-12 Floorboard Hinge Bolt Kit 1941-1984 Harley-Davidson All Models - Parkerized
5 reviews $14.89

The Rough Trade 2" Wrench for Harley-Davidson Small Port Knucklehead & Big Twin Flathead Intake
1 review $22.31

Cycle Standard 10 Hole Clutch Pressure Plate 1941-1984 Harley-Davidson Big Twins
1 review $14.78

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

Colony #3178-2 Piston Lock Ring Tool 1932-1973 Harley-Davidson Big Twins - Parkerized
2 reviews $44.00

Colony #3143-2 Top Plugs For Classic Springer Forks - Brass — Colony #3143-2 Brass Top Plugs For Classic Harley-Davidson Springer Forks
1 review $22.00

Colony #2985-2 Damper Tube Mounting Bolts & Copper Washers 1979-Up Harley Sportster 1975-Up FL/FX with 39mm Narrow Glide Forks
6 reviews $11.00

Colony #7825-20 Grade 8 Head Bolt Kit 1948-Up Harley-Davidson Panhead/Shovelhead - CAD Plated
$43.99

Colony #3036-22 Upper and Lower Motor Mount Kit 1937-1947 Harley-Davidson Big Twin Side Valve - Parkerized
1 review $43.82

Colony #2143-2 Springer Spring Rod Bushings 1949-1949 Harley-Davidson Big Twin 1946-1952 45s 1946-1957 Servi-car - Parkerized
$43.82

Colony #3287-2 Headlight Lens Retainer Spring Set 1936-1948 Harley-Davidson Big Twins 1935-1952 45s 1935-1957 Servicar
1 review $14.52

Colony #2973-4 Spacers Harley-Davidson OEM #58102-49 - 4 Pack - CAD Plated
4 reviews $10.89

Colony #3118-3 Sprocket Nut Lockplate Harley 93-06 Softail Touring 93-05 Dyna — Colony #3118-3 Sprocket Nut Lockplate 1993-2006 Harley-Davidson Softail/Touring 1993-2005 Dyna
$14.51

Colony #2019-8 Rocker Shaft End Plug 1957-1970 Harley-Davidson Big Twin - Chrome Plated
$43.45

Colony #9926-17-P Upper and Lower Motor Mount Smooth Allen Kit 1970-1984 Harley-Davidson Shovelhead - Chrome Plated
3 reviews $43.45

Colony #9530-13 Rear Crash Bar Mounting Kit 1936-1957 Harley-Davidson Big Twin - Chrome Plated
$43.32

Colony #8912-13 Transmission Side Cover Chrome Acorn Head Screw Kit 1987-2006 Harley-Davidson FXR/FLT/Softail 1991-2005 Dyna - Chrome Plated
$43.09

Colony #8006-2 Brass Intake Manifold Seals 1936-1939 Harley-Davidson Knucklehead All 1930-1948 Sidevalve (Except 45's)
$21.45

Cycle Standard Master Cylinder Gasket Harley-Davidson OEM #45012-72
14 reviews $6.09

Colony #7707-4 Spring Rod Kit 1936-1947 Harley-Davidson 45's & Big Twin Springers
2 reviews $42.63

Colony #2493-6 Rear Fender Frame Clamp Bolt Kit 1936-1957 Harley-Davidson Big Twin - Parkerized
1 review $42.38

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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