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 Craft #44 Pilot Jet - 1988-2006 Keihin CV Carburetor
$5.99

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

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

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 #9680-6 Front Fender Mounting Kit 1936-1948 Harley-Davidson Springers - Parkerized
$20.85

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

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

Colony #3139-4 Oversize 7/16-14 Transmission Case Bottom Stud Kit 1915-1936 Harley-Davidson Twins
$20.70

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

Colony #3672-10 Knurled Allen Sprocket Bolts 1985-1992 Harley-Davidson Big Twin - Chrome Plated
$20.63

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

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

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 #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

#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 #8400-8 Rocker Shaft Cap Nut & Washer Kit 1966-1985 Harley-Davidson Shovelhead 1957-1985 Sportster - Chrome Plated
$12.74

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

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

James Gaskets Replacement Float Bowl O-ring for 1988-1991 Harley-Davidson CV Carbs
$6.24

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

PanAm Oils Inc. Oil Pressure Gauge 0-60 psi - Black
9 reviews $37.15

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 #8729-12 Rubberized Cork Pushrod Cover Seals 1957-1979 Harley-Davidson XL 1936-1947 Knucklehead
1 review $9.08

Colony #3284-50 Flat Washers Harley-Davidson All FL/FX/XL OEM #6099 - Zinc Plated
$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 #7605-4 Rocker Arm Thrust And Packing Washer Kit 1936-1947 Harley-Davidson Knucklehead
$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 #7815-4 Acorn Head License Plate Mounting Kit And Rubber Washers - Chrome Plated
1 review $8.93

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 #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

Fast Eddy Co. No. 7 Connecting Rod Alignment Tool 1936-99 Harley Big Twins & All Sportsters
$34.95

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

Colony #9892-18 Gas Tank Mounting Kit 1937-1975 Harley-Davidson Big Twin 1972-1972 FX - CAD Plated
4 reviews $17.42

Cycle Standard Replacement Lower 39mm Damper Springs 1987-Up Harley-Davidson XL 1991-2005 FXD 1987-1994 FXR OEM# 45374-87
$17.17

Colony #8792-5 Disc Brake Rotor to Hub Flat Allen Screw 1980-1981 Harley-Davidson FLT OEM #1643 - Chrome Plated
1 review $17.14

Colony #3607-13 Horn Mounting Kit 1946-1948 Harley-Davidson All Models
$17.05

Colony #2409-1 Pinion Gear Nut 1954-1989 Harley-Davidson Big Twins
$17.05

Colony #3031-4 Upper Inner Pushrod Covers 1957-1985 Harley-Davidson Sportster 1936-1983 OHV Big Twin - CAD Plated
1 review $34.05

Colony #8909-13-P Transmission Side Cover Smooth Allen Kit 1987-2006 Harley-Davidson FX/FL/Softail 1991-2005 Dyna - Chrome Plated
$33.84

Colony #9419-19 Transmission Mounting Kit 1965-Early 1977 Harley-Davidson Big Twin - Zinc Plated
4 reviews $33.67

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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