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 #2986-4 Spring Retainer Acorn Nut Set 1936-1938 Harley-Davidson Big Twin 1949-1957 45s - Chrome Plated
$21.45

Colony #8442-19 Transmission Side Cover Clutch Arm Cap Nut Kit Harley-Davidson Big Twin 36-84 - Chrome Plated
$24.71

Colony #8437-16 Cylinder Base High Crown Cap Nut Set 1930-1977 Harley-Davidson 74s - Chrome Plated
$21.66

Colony #8906-5-P Transmission Shifter Cover Smooth Allen Kit 1987 Harley-Davidson FX/FL - Chrome Plated
$11.90

Colony #2991-2 Generator Screw Kit Special 5/16 inch case holes Harley Big Twins 36-57 — Colony #2991-2 Special Generator Screw Kit 5/16 inch Case Holes 1936-1957 Harley-Davidson Big Twins - Parkerized
$12.10

Colony #2964-2 Generator Frame Screw Kit 1932-1957 Harley-Davidson Twins - Parkerized
$17.42

Colony #2962-6 Flat Top Brass Grease Fitting Alemite Pre-1938 Harley-Davidson - 3 Pack
$20.85

Colony #2957-2 Kick Starter Pedal Rubber Rod Kit 1917-Up Harley-Davidson - CAD Plated
$19.36

Colony #2956-2 Kick Starter Pedal Rubber Rod Kit 1917-Up Harley-Davidso - Parkerized
$19.36

Colony #2854-6-P Upper Engine Mounting Kit 1984-1999 Harley-Davidson Softail - Chrome Plated
2 reviews $14.52

Colony #2530-6-P Fuel Tank Mounting Smooth Allen Kit 1985-1986 Harley-Davidson FXWG/FXST/FXSB/FXEF - Chrome Plated
$21.57

Colony #2523-5-P Fuel Tank Smooth Button Head Mounting Kit 1988-1994 Harley-Davidson FXR - Chrome Plated
1 review $13.92

Colony #2522-6-P Rear Fender Rail Mounting Smooth Allen Screw Kit 1973-1984 Harley-Davidson FX - Chrome Plated
$19.48

Colony #2524-2-P Fuel Tank Smooth Mounting Kit Pre-1984 Harley-Davidson Big Twins - Chrome Plated
1 review $10.44

Colony #8795-4-P Handlebar Clamp Smooth Allen Screw Kit 1974-1971 Harley-Davidson FX/XL L1977-1984 FL - Chrome Plated
$10.04

Colony #8470-8 Lifter Base Cap Screw Kit 1976-Up Harley-Davidson 74s - Chrome Plated
$27.89

Colony #8441-1 Timing/Oil Plug All Harley-Davidson Timing Plug and 74s Oil Tanks - Chrome Plated
$8.78

Colony #8763-20-P Primary Cover Smooth Allen Screw Kit 1980-1984 Shovelhead & Evo 5 speed - Chrome Plated
$37.22

Colony #9932-8-P Intake Manifold to Cylinder Smooth Allen Kit 1995-Up Harley-Davidson Big Twin/XL - Chrome Plated
1 review $9.35

Colony #8737-24-P Valve Cover Smooth Allen Screw Kit Harley-Davidson Panhead With Steel D Rings - Chrome Plated
$33.84

Colony #8457-20 Heat Treated Cap Style Head Bolt Kit 1948-1983 Harley-Davidson Panhead/ Shovelhead - Chrome Plated
$66.63

Colony #8440-12 Rocker Box Cap Bolt Set 1936-1947 Harley-Davidson Knucklehead - Chrome Plated
$27.51

Colony #2988-3 Crankcase Breather Stud and Pipe 1939-1947 Harley-Davidson Knuckleheads - Parkerized
$36.00

Colony #2967-10 Grade 8 Head Bolt Kit 1977-1984 Harley-Davidson Shovelhead - Chrome Plated
1 review $65.99

Colony #2966-10 Grade 8 Head Bolt Kit 1977-1984 Harley-Davidson Shovelhead - CAD Plated
3 reviews $44.00

Colony #8797-4-P Handlebar Lever Mount Smooth Allen Screw Kit Pre-1972 Harley-Davidson FX/FL/XL - Chrome Plated
$6.38

Colony #9783-4-P Headlight Visor Mounting Bolt Kit Smooth Chrome Allen Harley XL FX FXR 1959-up — Colony #9783-4-P Headlight Visor Smooth Allen Mounting Kit 1959-Up Harley-Davidson XL/FX/FXR - Chrome Plated
$5.58

Lowbrow Customs Competition Screw-In Gas Cap for Harley-Davidson 1996 & later - Black
32 reviews $42.17 $51.50

Colony #2846-3 Wheel Bearing Locknut/Seal Kit Harley-Davidson XL/FL/FLH/FX/Sidecar/Servi-car - Chrome Plated
$36.30

Colony #2778-4 Tail Light Bracket Mounting Kit 1947-1948 Harley-Davidson Tombstone
2 reviews $4.54

Colony #2933-1 Clutch Side Nut 1936-1940 Harley-Davidson Big Twin Knuckelhead
$41.80

Colony #2822-1 Oversized Linkert Carburetor Venturi 1-1/16 inch OEM #27362-30 Harley-Davidson
$41.97

Colony #2818-1 Oversized Linkert Carburetor Venturi 1-5/16 inch OEM #27363-41 Harley-Davidson
$43.32

Colony #2714-36 Instrument Panel Base Restoration Kit 1939-1946 Harley-Davidson Big Twins
1 review $49.50

Colony #2584-7 Steering Damper Upper Kit 1936-1948 Harley-Davidson Big Twin - Chrome Plated
$58.30

Colony #2908-2 Oil Tank Filler Cap and Gauge 1941-1964 Harley-Davidson Big Twins - Parkerized
$71.50

Colony #2904-2 Oil Tank Filler Cap and Gauge 1941-1964 Harley-Davidson Big Twins - CAD Plated
1 review $71.50

Colony #2903-2 Oil Tank Filler Cap and Gauge 1936-1940 Harley-Davidson Big Twins - CAD Plated
1 review $71.50

Colony #2677-10 Extra Long Seat Post Rod Nuts Spacers Kit 1936-1980 Harley-Davidson Big Twins
$82.50

Colony #2612-10 Seat Post Rod Nuts Spacer Kit 1936-1980 Harley-Davidson Big Twins
$82.50

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

Colony #2609-4 Instrument Panel Dash Base Contact Spring Kit 1936-1946 Harley-Davidson Big Twins
$35.75

Colony #2577-1 Boot Guard 1936-Up Harley-Davidson Knucklehead/Flathead - Chrome Plated
$99.00

Colony #2943-1 Boot Guard 1936-Up Harley-Davidson Knucklehead/Flathead - Black Powder Coated
$95.70

Colony #2720-6 Rear Brake Shoe Pivot Stud and Cup Assembly 1938-1957 Harley-Davidson Big Twin - Parkerized
2 reviews $31.90

Colony #2761-5 Kick Starter Pedal Axle Kit 1916-1962 Harley-Davidson - CAD Plated
2 reviews $30.25

Colony #2817-18 Oversized Top of Tank Screw and Washer Repair Kit 1918-1952 Harley-Davidson - Parkerized
$30.04

Colony #2937-5 Stem Nut Kit with Washer/Cover Harley-Davidson Wideglide Without Steering Damper - Chrome Plated
1 review $25.29

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

Colony #2703-7 Gas Tank Shut Off Rod Upper Kit 1940-1965 Harley-Davidson Big Twin/45s - Parkerized
$25.85

Colony #2873-1 Rear Axle Spacer 1958-1966 Harley-Davidson FL/FLH - Chrome Plated
$23.65

Colony #2821-3 Gas Tank Fitting Kit 1940-1949 Harley-Davidson Big Twin - Chrome Plated
1 review $28.00

Colony #2737-1 Fork Tube Cap/Plug 1984-2001 Harley-Davidson FLT - Chrome Plated
1 review $24.26

Colony #2593-5 Front Brake Control Wire Lower Connection Kit 1928-1948 Harley-Davidson Big Twins 1928-1950 45s - Parkerized
4 reviews $24.20

Colony #2719-22 Exhaust System Mounting Bolt Kit 1941-1957 Harley-Davidson Knucklehead/Panhead - Chrome Plated
$27.72

Colony #2890-1 Front Axle Spacer 1936-1948 Harley-Davidson Big Twin Springers 1942-1943 WLC 1941-1957 Servi-car - Chrome Plated
1 review $20.90

Colony #2855-7 Rear Caliper Stabilizer Bracket Bolt Kit 1980-1985 Harley-Davidson FLT - Zinc Plated
2 reviews $22.00

Colony #2772-22 Exhaust System Mounting Bolt Kit 1941-1957 Harley-Davidson Knucklehead/Panhead - Parkerized
$25.08

Colony #2910-6 Rear Stand Mounting Kit 1936 Harley-Davidson OHV 1937 Side Valve Big Twins - Parkerized
$17.52

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

Colony #2889-1 Front Axle Spacer 1936-1948 Harley-Davidson Big Twin Springers 1942-1943 WLC 1941-1957 Servi-car - Parkerized
$16.94

Colony #2874-1 Rear Axle Spacer 1967-1972 Harley-Davidson FL/FLH - Parkerized
1 review $16.94

Colony #2872-1 Rear Axle Spacer 1958-1966 Harley-Davidson FL/FLH - Parkerized
$19.36

Colony #2865-2 Shifter Lever Stud Kit 1916-1936 Harley-Davidson All Models - Nickel Plated
$16.94

Colony #2862-2 Instrument Panel Dash Base 1938-1946 Harley-Davidson Big Twins/45s - CAD Plated
$19.36

Colony #2850-24 Stock Style Panhead Valve Cover Screw Kit 1951-1954 Harley-Davidson Panhead
1 review $22.00

Colony #2815-2 Spring Retainer and Acorn Nut Set 1939-1948 Harley-Davidson Big Twin Springers 1936-1952 45s 1953-1954 Servi-car - Parkerized
$19.36

Colony #2777-9 Headlight Bracket Mount Kit 1936-1948 Harley-Davidson Big Twin 1940-1957 45s - CAD Plated
$19.97

Colony #2742-2 Left Bearing End Oil Slinger 1936-1954 Harley-Davidson Big Twin
$16.94

Colony #2736-1 Fork Tube Cap/Bolt 1984-2001 Harley-Davidson FLT - Chrome Plated
1 review $20.31

Colony #2671-2 Instrument Panel Light Shield Kit 1939-1946 Harley-Davidson Big Twins/45s - CAD Plated
$19.36

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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