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 #3754-1 Circuit Breaker Base Retainer 1936-1964 Harley-Davidson All Models
$21.45

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

Cycle Standard Screw-In Harley Stock Style Non-Vented Gas Cap - Left Side - 1996 & up - Black
$21.37

Cycle Standard Cycle Standard 24"" Handlebar Wiring Extension Kit for 1996-2006 Harley Models
10 reviews $42.67

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

Colony #8623-2 Seat Clevis Pin & Spring 1929-Up Harley-Davidson
5 reviews $13.94

Colony #9010-5 Linkert Carb Support Bracket 1954-1965 Harley-Davidson OEM #27431-41B - Parkerized
3 reviews $20.90

Colony #2743-2 Oversized Ignition Timer Cover Stud Kit 1980-Up Harley-Davidson Big Twin/Sportster - Zinc Plated
1 review $13.92

Colony #2450-1 Wire Clip Front Frame Leg 1936-1969 Harley-Davidson Big Twin - Parkerized
1 review $13.92

Colony #2416-4 Cone Head Riser Bolt Covers 1/2-13 x 2-3/4 bolts 1997-Up Harley-Davidson FXST/FXSTB/FXSTC/FXSTD 1993-2000 FXR 1991-Up Dyna - Chrome Plated
$41.75

Colony #2146-2 Tappet Oil Screen & Spring 1970-1999 Harley-Davidson Big Twin
2 reviews $10.42

Lowbrow Customs Black Solo Seat Bolt-On Spring Mounts for Harley-Davidson Swingarm Frames 1958 - 1985
5 reviews $41.60

Cycle Standard Kickstand Bumper Rubber - 1991-2000 Harley-Davidson Dyna OEM #50054-90
3 reviews $6.93

Colony #8151-2 Generator Screw Kit 1936-1957 Harley-Davidson Big Twin - Chrome Plated
1 review $10.37

Colony #9654-4 Oversize Transmission Case Bottom Stud Kit 1936-1983 Harley-Davidson Big Twins - Parkerized
3 reviews $20.70

Colony #8100-8 Chain Adjuster & Swingarm End Cover Kit 1973-1984 Harley-Davidson FX/FL 1979-1992 XL 1981-1987 FXR - Chrome Plated
3 reviews $41.29

Cycle Standard Oil Filter for Harley-Davidson XL FXR Softail Touring Models and Buell - Black - OEM #63805-80A 63796-77A
9 reviews $10.30

Drag Specialties Oil Filter for 1980-1985 Harley-Davidson Sportster and Big Twin Models - Black - OEM #63782-80
2 reviews $10.25

Cycle Standard 41mm Fork Seal Rebuild Kit - 1977-1984 Harley-Davidson FL 1980-83 FXWG FLT
$13.64

Cycle Standard Battery Bottom Plate Bracket - Chrome - Early Harley-Davidson 6 Volt Big Twins
$13.63

Colony #2810-13 Instrument Panel Light Switch Kit 1937-1938 Harley-Davidson Big Twins - CAD Plated
$40.70

Colony #3690-16 Plain Head Lower Motor Mount Kit 1936-1957 Harley-Davidson OHV Big Twins - Parkerized
$40.70

James Gaskets Top End Gasket Kit 1948-1965 Harley-Davidson Panhead
$40.59

Colony #8824-8 Coil Mounting Stud Kit 1956-1982 Harley-Davidson Big Twin OEM #72341-56A - CAD Plated
$13.40

The Rough Trade 1-3/8" Wrench for Top Fork Nut Harley-Davidson Hydra Glide/Big Twin Large Axle Nut
$20.00

Colony #3719-4 Fuel Tank Rubber Grommet Kit 2018-Up Harley-Davidson Softails
$20.00

Gasbox UL Front Pipe to Frame Clamp 2 piece Set 1936-48 UL Harley- Davidson - Parkerized OEM #65511-36
1 review $20.00

Colony #9671-20 Transmission Side Cover & Clutch Arm Nut Kit Pre-1984 Harley-Davidson 4 Speed - Parkerized
4 reviews $9.96

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 #2523-5 Gas Tank Allen Mounting Kit 1988-1994 Harley-Davidson FXR - Chrome Plated
$13.22

Colony #3735-4 Linkert Carburetor Gasket Kit 1933-65 Harley-Davidson
1 review $13.20

Colony #3567-1 Front Wheel Hub Plate 1991-1999 Harley-Davidson XL 1984-1999 FXR/FXD - Silver
3 reviews $19.80

Colony #9813-12 Beehive Tail Lamp Mounting Kit 1936-1946 Harley-Davidson - Parkerized
$13.20

Colony #8901-4 Carburetor Bowl Lock Nut 1930-1965 Harley-Davidson OEM #27375-29 - Chrome Plated
$19.80

Colony #7344-6 Intake Manifold Conversion Nipple Kit 1940-1954 Harley-Davidson 74's
1 review $39.47

#2151-5 Springer Ball Bushing Retainer Harley Servicar Big Twins OEM 54230-45 — Colony #2151-5 Springer Ball Bushing Retainer 1946-1952 Harley-Davidson 45 1946-1949 Big Twin 1946-1957 Servi-car - Parkerized
$39.25

Colony #3194-1 Harley Primary Drain Plug - Zinc Plated - Big Twin & Softail - 1987-2003 & 1993-2003
16 reviews $9.68

Colony #2898-1 Motor Sprocket Nut 1970-1990 Harley-Davidson Big Twins
$19.36

Colony #8919-19 Primary Cover Chrome Allen Head Screw Kit 1989-2006 Harley-Davidson Softail 1991-2005 Dyna - Chrome Plated
2 reviews $38.59

Colony #3199-5 Parkerized Carburetor Support Bracket Harley Davidson 41-47 OHV Big Twin — Colony #3199-5 Carburetor Support Bracket Harley-Davidson 1941-1947 OHV Big Twins - Parkerized
$19.25

Colony #9009-5 Linkert Carb Support Bracket 1941-1953 Harley-Davidson OHV OEM #27431-41 - Parkerized
$19.25

Colony #2794-6 Grease Zerk Fitting 1936-1984 Harley-Davidson - 6 Pack - Parkerized
5 reviews $12.74

Colony #3358-4 Handlebar Riser Cupped Washers 1973-Up Harley-Davidson All Models - Zinc Plated
$12.71

Colony #9783-4 Headlight Visor Mounting Allen Bolt Kit 1959-Up Harley-Davidson XL/FX/FXR - Chrome Plated
3 reviews $4.76

Colony #3553-3 Rear Axle Mount Kit 1989-Up Harley-Davidson Big Twins & XL - Chrome Plated
3 reviews $9.38

Colony #3117-2 Shift Fork Cam Shaft Lock Screw and Oil Seal Kit 1936-79 Harley Davidson Big Twins — Colony #3117-2 Shift Fork Cam Shaft Lock Screw & Oil Seal Kit 1936-1979 Harley-Davidson Big Twins
2 reviews $9.38

Colony #9106-8 Rear Brake Caliper Anchor Arm Bolt Kit 1973-1983 Harley-Davidson FL/FX - Chrome Plated
$18.76

Colony #3281-16 Saddlebag Guard Mount 1965-1967 Harley-Davidson FL/FX - CAD Plated
$37.40

Colony #3060-5 Foot Clutch Lever Friction Disc Kit 1936-1940 Harley-Davidson Knucklehead 1938-1952 45 Solo 1938-1946 Servi-car - Parkerized
$37.39

Colony #8493-2 Oil Tank Drain Plug 1981-Up Harley-Davidson Big Twin - Chrome Plated
1 review $12.34

Colony #8934-2 Rear Axle Adjuster Screws 1986-1992 Harley-Davidson FXST - Chrome Plated
1 review $18.16

Colony #3284-50 Flat Washers Harley-Davidson All FL/FX/XL OEM #6099 - Zinc Plated
$12.10

Colony #3282-4 Rocker Arm Cover Gasket Kit 1936-1947 Harley-Davidson Knucklehead
$12.10

Colony #3222-1 Spark Plug Cable Bracket 1966-1984 Harley-Davidson Big Twins - Zinc Plated
1 review $18.15

Colony #3121-6 Carburetor Bowl Locknut CAD 1930-65 Harley Davidson Big Twins — Colony #3121-6 Carburetor Bowl Locknut 1930-1965 Harley-Davidson Big Twins - CAD Plated
$18.15

#3093-12 Valve Cover Gasket Kit Harley 1939-48 UL ULH Sidevalves — Colony #3093-12 Valve Cover Gasket Kit 1939-1948 Harley-Davidson UL/ULH Sidevalves
$18.15

Colony #8214-7 Generator Mounting Hardware Kit 1930-1957 Harley-Davidson Twins - CAD Plated
1 review $18.15

Colony #8715-4 Rear Axle Nut & Washer Kit 1973-Up Harley-Davidson Big Twin 1979-Up XL - Chrome Plated
1 review $18.15

Colony #3685-12 Lower Motor Mount Kit 1966-1969 Harley-Davidson OHV Big Twins - Chrome Plated
$36.03

Colony #2989-3 Crankcase Breather Stud Pipe Assembly 1948-1957 Harley-Davidson Panhead - Parkerized
3 reviews $36.00

Colony #9308-17 Primary Cover Screw Kit 1970-1980 Harley-Davidson Shovelhead - CAD Plated
$17.99

Colony #9776-10 Handlebar Lever Mount & Master Cylinder Allen Screw Kit 1996-Up Harley-Davidson Dyna/Softail 1996-2007 FLT 1996-2003 XL - Chrome Plated
$17.88

Colony #8791-10 Disc Rear Rotor to Hub Screw Kit 1979-1991 Harley-Davidson FX/XL 1981-1984 FL - Chrome Plated
2 reviews $17.88

Colony #3551-4 Triple Clamp Bolt 1930-1931 Harley-Davidson Twins - Parkerized
$35.20

Colony #2747-8 Rear Axle Adjusters Swingarm End Cover Kit 1997-2001 Harley-Davidson FLT - Zinc Plated
3 reviews $35.20

Colony #7120-4 Aluminum Valve Retainers - All Harley-Davidson Davidson OHV 74's
1 review $35.13

Colony #3634-2 Reproduction Footrests 1952-1990 Harley-Davidson K/KH/XL 1971-1991 FX
$35.00

Colony #9696-18 Saddle to Seat Tee Mounting Kit 1934-1980 Harley-Davidson All Models (Except FX/XL) - Parkerized
5 reviews $35.00

Drag Specialties Shifter Linkage - Chrome - 1991-2005 Harley-Davidson FXD
1 review $34.97

Gasbox Gorilla Headlight Mount for Harley FL 41mm Wide Glide Front Forks
$34.95

Colony #8733-24 Valve Cover Screws 1-1/4 inch Long 1954-1965 Harley-Davidson Panhead With Alloy D-Rings - CAD Plated
$34.93

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

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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