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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Blue Streak High-Performance Condenser - 1970-79 Harley-Davidson
$10.95

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

Colony #8708-8 Lifter Base Screw Kit 1976-Up Harley-Davidson Big Twin - Chrome Plated
1 review $16.26

Cycle Standard Cycle Standard 24"" Handlebar Wiring Extension Kit for 1996-2006 Harley Models
10 reviews $40.64

Cycle Standard Neck Post Bearing & Race Set Made in China
$15.99

Colony #2998-5 Rear Brake Switch Pull Kit 1940-1957 Harley-Davidson Big Twins - CAD Plated
$31.89

Colony #9824-3 Custom Front Axle Nut & Spacer Kit 1988-1996 Harley-Davidson FXSTS - Chrome Plated
$31.87

Colony #8857-8 Cylinder Base Stud Set 1978-1984 Harley-Davidson Big Twins OEM# 16837-78
1 review $31.87

Colony #8856-8 Cylinder Base Stud Set 1930-1977 Harley-Davidson Big Twins OEM# 16831-30
3 reviews $31.87

Colony #7603-4 Lower Motor Mount Kit Acorn Nut 1936-1984 Harley-Davidson OHV Big Twins - Chrome Plated
6 reviews $31.87

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

Colony #2331-20 Battery Box Mounting Kit 1965-1984 Harley-Davidson FX/FL
$15.73

Cycle Standard Replacement Lower 39mm Damper Springs 1987-Up Harley-Davidson XL 1991-2005 FXD 1987-1994 FXR OEM# 45374-87
$15.61

Colony #8916-17-P Primary Cover Smooth Allen Screw Kit 1985-Up Harley-Davidson FXR 1985-1999 FLT 5 speed - Chrome Plated
1 review $31.13

Colony #3050-2 Stem Nut Lockwasher Kit 1960-Up Harley-Davidson FL/FLH W/O Steering Damper
$15.52

Colony #9401-1 Aluminum Transmission Filler Plug 1958-1980 Harley-Davidson Big Twin
1 review $15.52

Colony #9412-19 Timing Cover Screw Kit 1937-1973 Harley-Davidson 45's - Chrome Plated
$30.87

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

Colony #3469-1 Rear Chain Oiler Tee Fitting 1970-1978 Harley-Davidson FL/FLH/FX - Zinc Plated
$30.80

Colony #2505-1 Spark Plug Front Cable Clamp 1936-1969 Harley-Davidson 74 OHV - CAD Plated
$7.70

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

Colony #8835-10 Sprocket Bolt & Washer Kit Allen Head 1993-1998 Harley-Davidson Big Twin Spoke Wheel 1979-1990 XL Cast Wheel - Chrome Plated
1 review $30.79

Cycle Standard Screw-in Style Gas Cap Gasket replaces Harley-Davidson OEM #61109-85
22 reviews $3.41

Cycle Standard Rocker Oil Lines - Chrome - 1966-84 Harley-Davidson Shovelhead
$30.63

Colony #7614-2 Intake Manifold Nut Kit 1940-1954 Harley-Davidson OHV 74's 1953-1956 K/KH - CAD Plated
$30.42

Colony #9605-2 Oil Pump Relief Valve Plug 1954-1967 Harley-Davidson Big Twin - Chrome Plated
1 review $15.14

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

Unity Manufacturing Linkert Intake Leak Tester - 4 Bolt
$30.00

Colony #8756-30 Primary Cover Allen Screw Kit 1936-1984 Harley-Davidson Big Twin - Chrome Plated
$30.00

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

Colony #2130-4 Handlebar Riser Allen Bolt Kit 1/2-13 x 3-1/2" - Chrome Plated
$14.89

Colony #2095-4 Handlebar Riser Allen Bolt Kit 1/2-13 x 2-3/4" Harley-Davidson FXST/FLST Models - Chrome Plated
2 reviews $14.89

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
3 reviews $14.89

Cycle Standard Oil Filter OEM# 63840-53 for Harley-Davidson Big Twins with Filter In Tank
9 reviews $7.44

Colony #2680-4 Handlebar Riser Mounting Kit 1949-1959 Harley-Davidson Big Twins - CAD Plated
$29.70

Cycle Standard Shift Lever - 1971-1974 Harley-Davidson XL And Early Big Twins (No Splines) - Chrome - OEM# 34606-71, 34606-54TA
$29.49

Lowbrow Customs FiltroMax Big Twin Bracket - Black
3 reviews $29.39

Colony #7715-6 Dash Plate Mounting Kit All 1936-1946 Harley-Davidson Big Twins
$29.37

Colony #8007-2 Intake Manifold Nuts 1936-1939 61 c.i. Knucklehead & 1930-1948 Sidevalve (Except 45's) - CAD Plated
$29.34

Colony #9639-22 Electrical Terminal Plate 1970-1977 Harley-Davidson FL/FX - CAD Plated
$29.24

Cycle Standard Bayonet / Cam Harley Style Vented 2.5" Gas Cap - Gloss Black
6 reviews $29.18

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 #2724-10 10mm Brake Line Banjo Bolt Crush Washers 2008-Up Harley-Davidson Touring 2006-Up VRSC - 10 pack
1 review $14.52

Colony #9633-50 Flatwashers Harley-Davidson FL/FX/XL OEM# 6099 - Chrome Plated
6 reviews $14.52

Colony #8942-14 Frame Electrical Terminal Screws & Fittings 1936-1947 Harley-Davidson Big Twins 45's - CAD Plated
$14.52

Colony #8750-14 Transmission Top Cover Allen Screw 1936-1964 Harley-Davidson Big Twin - Chrome Plated
$28.97

Colony #9603-2 Oil Screen Plug 1952-1965 Harley-Davidson Big Twin - Chrome Plated
$14.34

Colony #9672-8 Linkert Carb Mounting Screws Harley-Davidson OEM# 27422-39 - Parkerized
2 reviews $9.56

Colony #9664-8 Linkert Carb Mounting Screws Harley-Davidson OEM# 27424-48 - Parkerized
3 reviews $9.56

Colony #8154-2 Generator Mounting Screws 1958-1969 Harley-Davidson Big Twins - CAD Plated
2 reviews $9.56

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 #8601-8 Hi-Torque Cylinder Base Nut Set Harley-Davidson Big Twin Pre-Evo - Black
2 reviews $28.60

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

Gigacycle Garage Gigacycle Garage Seat Bolt 1/4"-20 for 1997-Up Harley-Davidsons
$28.00

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

Colony #9720-1 Stem Nut 1936-1948 Harley-Davidson Big Twin Springers - Parkerized
3 reviews $13.94

Colony #2415-4 Handlebar Riser Custom Washer Kit 1973-Up Harley-Davidson - Chrome Plated
1 review $27.83

Colony #8748-12 Transmission Top Cover Allen Screw 1965-1978 Harley-Davidson Big Twin - Chrome Plated
2 reviews $27.83

Colony #9917-8 Rocker Arm Heat Treated Stud Kit 1948-1965 Harley-Davidson Panhead
2 reviews $27.75

Colony #8747-12-P Oil Pump Mounting Kit Smooth Allen Screw Kit 1978-1991 Harley-Davidson Shovelhead & Evolution - Chrome Plated
$13.78

Colony #3767-15 Sprocket Bolt/Nut/Washer Kit 1985-1992 Harley-Davidson Big Twins - Zinc Plated
$27.50

Colony #3344-4 Shock Mount Bolt Kit 1984-1999 Harley-Davidson Softail - Chrome Plated
1 review $27.50

Colony #2702-7 Gas Tank Shut Off Rod Upper Kit 1940-1965 Harley-Davidson Big Twin/45s - Chrome Plated
$27.50

Colony #2519-2 Front Axle Smooth Covers 1991-2003 Harley-Davidson Dyna 1988-2007 Sportster - Chrome Plated
1 review $27.50

Lowbrow Customs Slick Bungee Nuts - 3/8"-16
2 reviews $13.72

Colony #8728-12 Rubberized Cork Pushrod Cover Seals Pre-1979 Harley-Davidson Panhead/Shovelhead
18 reviews $9.08

Colony #2076-10 Gas Tank Mounting Acorn Kit 1991-Up Harley-Davidson Dyna - Chrome Plated
1 review $27.23

Colony #9504-1 Timing & Oil Tank Plug 1938-1951 Harley-Davidson All Models OEM# 2326-38 - Parkerized
$6.78

Colony #2215-4 Swing Arm Pivot Hex Bolts 1984-1999 Harley-Davidson Softail - Chrome Plated
3 reviews $27.07

Colony #8943-27 Headlamp Restoration Kit 1935-1948 Harley-Davidson Springers - CAD Plated
$27.07

Colony #2142-12 Pushrod Cover Seal Kit 1979-1984 Harley-Davidson Shovelhead
3 reviews $13.40

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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