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 #3464-1 Choke Lever 1938-1965 Harley-Davidson Big Twins - Parkerized
$32.99

Colony #3455-1 Self Tapping Transmission Filler Plug 1936-1957 Harley-Davidson Big Twin - Parkerized
$15.40

Colony #3445-8 Rocker Shaft End Plug & Cap Nut Kit 1971-Up Harley-Davidson Shovelhead 1971-1985 Sportster
2 reviews $31.81

Colony #3426-1 Choke Lever 1938-1965 Harley-Davidson Big Twins - CAD Plated
$32.99

Colony #3379-1 Speedometer Cable Clip 1929 Harley-Davidson JD 1930-1936 All Models - Parkerized
$21.99

Colony #3368-2 Air Cleaner Connection Mounting Screws 1929-1931 Harley-Davidson 45 Twins 1930-1932 74" Twins - CAD Plated
$6.66

FNA Custom Cycle Carb Arm Support Bracket for Harley-Davidson Ironheads and Shovelheads - Polished
$135.71

Cycle Standard 5 Hole Chrome Derby Cover for Harley-Davidson Big Twins
$27.80

Cycle Standard Master Cylinder Rebuild Kit Replaces Harley-Davidson OEM #42382-87A
2 reviews $57.62

Mid-USA Panhead OEM Style Springer Front End - Harley Big Twin 1936-1947
3 reviews $970.20

Mid-USA 19 x 2.5 Chrome Complete Front Wheel Fits Harley-Davidson Sportster XL & FX 1984-1999
2 reviews $305.05

Fast Eddy Co. No. 19 WA Sprocket Shaft Bearing Installer with Seal Adapter 1955-2002 Harley Big-Twin
3 reviews $249.95

Lowbrow Customs Oil Gauge Adapter Tappet Screen Fitting 1966-1999 Harley-Davidsons
9 reviews $21.79

Mid-USA 21 x 2.15 Black Complete Front Single Flange Wheel Harley-Davidson FXST FXDWG 1984-1999
8 reviews $238.15

Mid-USA 21 x 2.15 Chrome Complete Front Single Flange Wheel Harley-Davidson FXST FXDWG 1984-1999
4 reviews $264.75

Mid-USA 16 x 3.00 Chrome Complete Front Wheel Harley-Davidson FLST 1984-1999
4 reviews $233.50

Gigacycle Garage 4 piston Rear Brake Bracket 1982-94 and 1999-2000 Harley-Davidson FXR Models
1 review $355.00

Lowbrow Customs 21" Front Ribbed Spool Wheel - 3/4" Bearings - Chrome
24 reviews $336.68

Colony #3425-10 Disc Brake Rotor Bolt Kit 1973-1980 Harley-Davidson FL Rear 1973-1974 FL Front 1973 FX/XL Front - Zinc Plated
2 reviews $13.31

Colony #3421-1 Oversized Motor Case Drain Plug 1936-1970 Harley-Davidson Big Twin Cases 1937-Up 45 Cases 1968-1984 Oil Pump Body - CAD Plated
$5.50

Colony #3407-14 Timing Cover Screw Kit 1930-1936 Harley-Davidson VL - CAD Plated
$20.63

Colony #3403-8 Cylinder Base Stud Spacers 1978-1984 Harley-Davidson Shovelheads - Zinc Plated
1 review $19.51

Colony #3409-4 Rear Master Cylinder Spacers 1972-E1979 Harley-Davidson - 4 pack - Zinc Plated
$10.89

Colony #3365-2 Carburetor Line Fitting 1952-Up Harley-Davidson Big Twin/XL - CAD Plated
$9.68

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

Colony #3350-7 Clutch Release Stud Bushings 1936-1984 Harley-Davidson Big Twins - Parkerized
1 review $24.75

Colony #3356-4 Rear Fender Support Mount Screws 1984-2000 Harley-Davidson Softail 1980-1986 FXWG - Chrome Plated
1 review $12.46

Colony #3355-4 Rear Fender Support Mount Screws 1984-2000 Harley-Davidson Softail 1980-1986 FXWG - Zinc Plated
$10.04

Colony #3177-2 Piston Lock Ring Tool Pre-1977 Harley-Davidson K/KH 1973-Up FL
6 reviews $82.50

Colony #3353-4 Oil Line Nut & Sleeve Rubber 1949-1964 Harley-Davidson Big Twins 1954-1966 KH/XL - CAD Plated
1 review $12.10

Colony #3348-12 Ignition Switch Mounting Kit 1939-1946 Harley-Davidson All Twins - CAD Plated
1 review $8.71

Colony #3360-7 Headlamp Cowl Screw Set 1960-1984 Harley-Davidson FL 1960-1973 Servi-car - Chrome Plated
$8.47

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

Colony #3362-1 Battery Upper Bolt Lock Plate 1930-1936 Harley-Davidson VL 74/80 Twins - Parkerized
$15.72

Mid-USA 16" x 3.00" Black Wheel for 1973-1984 Harley Big Twin - Front or Rear - Dual Flange
5 reviews $247.55

Mid-USA 16 x 3.00 Chrome Complete Front / Rear Wheel fits Harley-Davidson Big Twins 1973-1984
15 reviews $202.75

Colony #7131-12 Aluminum Alloy Tubular Adjustable Pushrods & Lifter Adapters 1953-1965 Harley-Davidson Panhead
$85.45

Colony #3340-3 Gas Tank Fitting Kit 1949 Harley-Davidson Big Twins - CAD Plated
1 review $26.00

Colony #3337-3 Gas Tank Fitting Kit 1964 Harley-Davidson Big Twins - CAD Plated
$26.00

Lowbrow Customs Belt to Chain Conversion Kit 2000-2005 Harley-Davidson Dyna Spoked Wheels - Chrome Sprocket
1 review $212.43

Colony #3302-3 Brake and Clutch Rod Pin Kit 1915 -1929 Harley-Davidson Twins - Parkerized
$6.05

Colony #3326-2 Oil Pump Cover to Oil Filter Line Fitting 1950-1957 Harley-Davidson Big Twin - CAD Plated
1 review $7.26

Drag Specialties Oil Pressure Gauge Mounting Kit 1984 - 1999 Harley-Davidson Big Twins
8 reviews $36.00

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

Colony #3297-18 Spotlight Mounting Kit 1979-1984 Harley-Davidson FL/FLH - Zinc Plated
$17.55

Colony #3298-18 Spotlight Mount Kit 1979-1984 Harley-Davidson FL/FLH - Chrome Plated
1 review $22.55

Lowbrow Customs Narrow Rabbit Ears Handlebars - 1 inch - Black
14 reviews From $136.38

Colony #3291-2 Brake Cable Clevis Clamp & Nut 1949-1971 Harley-Davidson EL/FL/FLH 1971-1972 FX 1952-1972 K/XL 1951-1971 45's/Servicar
2 reviews $9.68

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 #3286-12 Rocker Box Mounting Kit 1936-1947 Harley-Davidson Knucklehead - Parkerized
$20.57

Colony #3228-1 Upper Fork Bearing Adjustment Nut 1949-1984 Harley-Davidson 4-speed Big Twins 1993-2005 FXDWG 1984-2006 Softail - Zinc Plated
2 reviews $12.10

Colony #3245-2 Valve Spring Cover Wrench Set 1930-1938 Harley-Davidson VL/UL
2 reviews $39.60

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 #3260-36 Head Bolt Set Early 1930 Harley-Davidson VL Models - Parkerized
$96.62

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

Colony #3248-8 Footboard Hinge Rivet Kit 1914-1973 Harley-Davidson All Models
$16.94

Colony #3268-10 Disc Front Brake Rotor to Hub Screw & Nut Kit 1984-Up Harley-Davidson FXST/FXWG - Zinc Plated
$12.10

Colony #3250-12 Windshield Mounting Kit 1936-1957 Harley-Davidson Models with Springer Fork
$14.83

Colony #3242-2 Control Coil End Plugs 1954-1974 Harley-Davidson Big Twins 1954-1973 K/KH/XL 1958-1973 Servicar
$16.50

Colony #3241-2 Control Coil End Plugs 1949-1954 Harley-Davidson All Models 1954-1957 Servicar
$16.50

Cycle Standard Shift Lever - 1997-2013 Harley-Davidson Big Twins - Chrome - OEM #33849-97
5 reviews $34.88

Gasbox 4 Speed Transmission Mounting Plate for 1965 - 1979 Harley-Davidson Big Twins OEM #47698-65
2 reviews $59.95

Gasbox 4 Speed Transmission Mounting Plate for 1958 - 1961 Harley-Davidson Big Twins OEM #47698-36A
1 review $59.95

Gasbox 4 Speed Transmission Mounting Plate for 1937 - 1957 Harley-Davidson Big Twins OEM #47698-36
1 review $59.95

Colony #3239-4 Front Brake Cable Handlebar Clip 1928 - 1948 Harley-Davidson Big Twins and 1932 - 1957 45's and Servi-cars — Colony #3239-4 Front Brake Cable Handlebar Clip 1928-1948 Harley-Davidson Big Twins 1932-1957 45s/Servi-cars - Chrome Plated
$23.00

Colony #3238-2 Oil Pump Cover Nipple 1950 - 1964 Harley-Davidson Big Twins - Chrome — Colony #3238-2 Oil Pump Cover Nipple 1950-1964 Harley-Davidson Big Twins - Chrome Plated
1 review $9.68

Colony #3225-2 Delco-Remy Horn Diaphram Screw and Nut Kit 1931 - 1957 Harley-Davidson — Colony #3225-2 Delco-Remy Horn Diaphram Screw & Nut Kit 1931-1957 Harley-Davidson - Parkerized
$10.89

Colony #3165-4 Muffler Mount Spacers 1979 - 1984 Harley-Davidson FL FLH OEM 57089-71 — Colony #3165-4 Muffler Mount Spacers 1979-1984 Harley-Davidson FL/FLH - Zinc Plated
1 review $10.89

Gasbox Rocket Tip Muffler 1941-1949 Harley-Davidson Knuckleheads and 74 and 80 ci Flathead Models - Bare Steel OEM #65251-41
1 review $150.00

Gasbox Panhead Exhaust Pipe Set 1958-1964 Harley-Davidson Swingarm FL FLH 74 ci - Bare Steel
1 review $239.95

Colony #3215-4 Throttle Cable Bracket 1949 - 1953 Harley-Davidson Big Twins — Colony #3215-4 Throttle Cable Bracket 1949-1953 Harley-Davidson Big Twins - Parkerized
$20.57

Colony #3202-4 Switch Box Fastening Bolt Kit 1929 - 1936 Harley-Davidsons — Colony #3202-4 Switch Box Fastening Bolt Kit 1929-1936 Harley-Davidsons - Parkerized
$11.99

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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