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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The Rough Trade 2-1/8" Wrench for Harley-Davidson Large Port Knucklehead & Panhead Intake
$22.31

Cycle Standard Clutch Cable OEM #38602-92 Harley Dyna 1992-2005
$51.15

Colony #8603-8 Adjustable Pushrod & Solid Lifter Kit 1984-Up Harley-Davidson Evo
2 reviews $102.11

Colony #2513-3 Clutch Drive Hub Stud Nut Kit 1947-1984 Harley-Davidson Big Twin 1947-1973 45's - Parkerized
7 reviews $7.26

Cycle Standard 5-1/2 inch Pullback Handlebar Riser Set - Black
$101.35

Lowbrow Customs Finish Line Foot Peg Set - Black Aluminum
13 reviews $100.37

Drag Specialties Breaker Plate Assembly 1970-1999 Harley Davidson Big Twin 1971-2003 XL Points Ignition (Except Single Fire Ignition)
$25.63

Colony #7508-20 Upper Pushrod Cover Kit 1940-1947 Harley-Davidson Knucklehead Shovelhead and Evo - Chrome Plated
3 reviews $50.08

Colony #9724-30 Primary Cover Screw Kit 1936-1964 Harley-Davidson Big Twin - Parkerized
2 reviews $25.00

Colony #9602-8 Oil Tank Mounting Kit - 1936-1957 Harley-Davidson Knucklehead/Panhead- Chrome Plated
2 reviews $19.97

Colony #3566-1 Front Wheel Hub Plate 1991-1999 Harley-Davidson XL 1984-1999 FXR/FXD - Black
1 review $19.80

Colony #2880-3 Carburetor Float Valve and Seat 1933-1965 Harley-Davidson Linkert Carburetors
$24.75

Cycle Standard Transmission Mounting Plate 1986-1999 Harley-Davidson Softail - Chrome
$32.97

Colony #7112-19 Transmission Side Cover & Clutch Arm Acorn Nut Kit - 1936-1984 Harley-Davidson Big Twin 4 Speeds - Chrome Plated
3 reviews $24.71

Colony #2314-36 Transmission Mounting Kit 1936-1964 Harley-Davidson Big Twin - Parkerized
3 reviews $49.41

Colony #2147-8 Handlebar Riser Cover Mounting Studs & Chrome Acorns 1949-1959 Harley-Davidson Big Twin - Chrome Plated
1 review $32.89

Colony #3537-17 Primary Cover Allen Screw Kit 1971-Up Harley-Davidson Shovelhead & Evolution 4 Speed
4 reviews $16.34

LCFabrications Riser Adapter for Integrated Top Triple Tree
$49.00

Cycle Standard 41mm Fork Seal Rebuild Kit - 1949-1977 Harley-Davidson FL
$19.43

Lowbrow Customs Domed Screw-In Gas Cap for Harley-Davidson 1982-1995 / Modern Triumph Bonneville T100 / T120, Scrambler, Thruxton - Aluminum
2 reviews $48.55

Cycle Standard Kickstand Bumper Rubber - 1985-2000 Harley-Davidson Touring Models OEM #50059-85A
2 reviews $6.93

Samwel Supplies Axle for Springer Forks
4 reviews $57.74 $96.23

Drag Specialties Starter Brake Light and Fuel Pump Relay 1991-2007 Harley-Davidson Big Twin Models (w/diode)
1 review $16.00

Saddlemen 1/4 inch -20 Seat Mount Knob - Black
6 reviews $8.00

Cycle Craft #180 Main Jet - 1988-2006 Keihin CV Carburetor
1 review $5.99

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

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

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

Cycle Standard Engine Stabilizer Link - Chrome - 1995-2017 Harley-Davidson Dyna
$95.08

Colony #3664-10 Disc Rotor Allen Screw & Nut Kit 1979-1991 Harley-Davidson XL/FX (Spoked Wheel) - Zinc Plated
$15.73

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

Colony #7502-2 Oversize Drain Plug & Tap Kit 1965-Up Harley-Davidson Big Twins 1967-Up Sportster - Chrome Plated
2 reviews $46.35

Colony #3692-1 Valve Spring Lifter 1939-1948 Harley-Davidson UL/ULH Sidevalves
$30.80

Colony #2276-10 Sprocket 12 Point Bolt and Nut Kit 1973-Up Harley-Davidson Big Twin and XL - Chrome Plated
4 reviews $30.79

Lowbrow Customs Finish Line Shifter Peg for Harleys - Black Aluminum
4 reviews $30.78

Lowbrow Customs Lowbrow Customs Spark Plug Wire Set 1986-2003 Harley-Davidson XL 1980-1989 FLH/FLT
$22.99

Colony #7410-1-US Sprocket Shaft Bearing Retainer with Lip Seal -.002 Undersized Threads 1955-1968 Harley-Davidson 74's
1 review $45.98

Cycle Standard 49mm Fork Leg Assembly Rebuild Kit 2016-2021 Harley-Davidson XL1200X 2018-2023 Softails 2014-2023 FLHT/FLHR/FLHX/FLTRX/FLTRU/FLTRK
$91.80

Cannonball Custom Transmission Adjuster Custom for Cannonball Transmission Base Plate 1936-1985 4 Speed Harley-Davidson Big Twins
$91.46

Colony #3269-5 Rear Disk Brake Rotor Screw Kit 1997-Up Harley-Davidson All Models - Zinc Plated
2 reviews $11.32

Cycle Standard Fork Neck Cup Dust Shield - Top - for Harley-Davidson Big Twins OEM #48361-80
12 reviews $9.02

Hawthorn Co. Cycles Battery Box Antigravity 12 Cell w/ Breaker Mount & OEM Horseshoe Tank Adapter Plate
$90.00

Martian Machine Heart Cast Aluminum Points Cover - Horizontal
$45.00

Martian Machine Heart Cast Aluminum Points Cover - Veritcal
2 reviews $45.00

Cycle Standard Kickstand Spring 19366 -1987 Harley-Davidson Big Twins / Pre 1984 Ironhead Sportster Models - Black - OEM #50011-30TA
7 reviews $9.00

Drag Specialties Vented Screw-In Gas Cap - Chrome - 1982-1996 Harley-Davidson
6 reviews $30.69

Colony #9617-18 Jiffy Stand & Foot Clutch Lever Bracket Mounting Kit 1936-1978 Harley-Davidson Big Twin - Chrome Plated
$29.78

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

Colony #3605-45 Horn Mounting Kit 1936-1941 Harley-Davidson All Models (except VL/RL)
$89.00

Drag Specialties XLX Style Front Fender 1999-05 Harley-Davidson Dyna 86-Up XL 11-Up 883L/1200C/1200CX 14-20 1200T
2 reviews $88.95

Colony #9608-10 Hex Bolt & Washer Kit Rear Wheel 1973-1992 Harley-Davidson Big Twin 1979-1990 XL - Chrome Plated
3 reviews $29.44

Colony #8474-8 Cylinder Base High Crown Cap Nut Set 1978-1984 Harley-Davidson Shovelhead - Chrome Plated
$29.34

Colony #3308-6 Locking Exhaust Bolt Kit 1966-1984 Harley-Davidson Shovelhead
13 reviews $22.00

Gasbox Shovelhead Exhaust Flanges - Mild Steel
12 reviews $21.95

Cycle Standard Throttle Idle Cable OEM #55355-92 Harley Dyna 1992-1995
2 reviews $21.92

Cycle Standard Throttle Cable OEM #56356-92 Harley Dyna 1992-1995
2 reviews $21.91

Drag Specialties Billet Flange Carb Adapter - Mount Mikuni or CV carb to Harley-Davidson Evo Big Twin/Panhead/Shovelhead/Ironhead Models
13 reviews $45.04

Unity Manufacturing Clutch Retaining Washer - 1936-1984 Harley-Davidson
$12.50

Colony #2014-6 Oversize Panhead Valve Cover Screws 1948-1965 Harley-Davidson Panhead W/Alloy D Rings - Chrome Plated
1 review $21.73

Colony #2000-6 Swing Arm End Plates/Wheel Adjuster 1991-2005 Harley-Davidson Dyna Glide - Chrome Plated
1 review $21.73

Colony #7620-1 Fork Tube Cap/Bolt/Breather 1947-1977 Harley-Davidson Glide Front Ends - Chrome Plated
$21.73

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

Colony #8706-6 Tappet Oil Screen/Oil Pump Check Valve/Relief Valve Plug Set 1970-1980 Harley-Davidson Big Twin - Chrome Plated
1 review $28.60

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

Colony #7132-12 Aluminum Alloy Tubular Adjustable Pushrods & Lifter Adapters - 1966-1984 Harley-Davidson Shovelhead
1 review $85.45

Colony #8916-17 Primary Cover Allen Head Screw Kit 1985-Up Harley-Davidson FXR 1985-1999 FLT - Chrome Plated
3 reviews $28.42

Cycle Standard Foot Peg Spring Washers - 10 Pack
$12.14

Lowbrow Customs 60 psi Oil Pressure Gauge - White Face
24 reviews $42.26

Gasbox S&S Carburetor Support Bracket - 1999 - 2006 Harley-Davidson Twin Cam
7 reviews $27.99

K&N Air Filters Oil Filter - Chrome - 1982-1985 Harley-Davidson Big Twin - K&N Part # KN-172C
$20.99

Colony #8104-16 Cylinder Base Nuts 1930-1978 Harley-Davidson Big Twins - Chrome Plated
$20.99

Colony #9843-8 Chrome Countersink Washer Set for #10 Flat Head Socket Screws Harley-Davidson - Chrome Plated
$13.94

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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