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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Mooneyes 60 psi Oil Pressure Gauge
36 reviews $49.00

Cannonball Springbrake Disc Brake Kit for I-Beam And Classic Springer Forks - Star Hub
1 review $1,656.10

Dynatek Performance Electronics 5 ohm Dual Fire Coil - for Points Ignition
4 reviews $132.86

Fast Eddy Co. No. 3 Pinion Gear Puller for all 1999 & earlier Harley-Davidson
14 reviews $109.95

Cannonball Extended Throwout Bearing for Stealthstarter Electric Starter 1936-1975 4 Speed Harley-Davidson Big Twins
1 review $90.54

Lowbrow Customs 39mm Solid Handlebar Riser Bushings for Harley-Davidson - Aluminum
34 reviews $36.98

Cycle Electric Generator DGV-5000-L-BLK 12 Volt - Low Voltage - 1965-84 Harley-Davidson - Blacked Out
2 reviews $535.58 $573.32

Lowbrow Customs Motorcycle Neck Cup & Bearing Race Installer Tool
5 reviews $51.65

American Prime Mfg. Transmission Bearing Support
4 reviews $59.95

Cycle Standard 35MM Chrome Fork Tubes - 31-1/4 inch - 8 Over
1 review $199.10

Cycle Standard 1936-1986 Harley-Davidson Big Twin 4 Speed Complete Kickstarter Rebuild Kit
$305.68

Mullins Chain Drive 35mm Super Narrow Triple Trees Set
4 reviews $500.00

Gasbox Bolt-On Oil Tank for Rigid Harley-Davidson Big Twin Frames 1936-1957
11 reviews $299.99

Bates BattBoy Battery Box for Modern Gel or Li-Ion Batteries fits OEM-style Harley-Davidson Horseshoe Oil Tanks
26 reviews $149.09

Cycle Craft Carburetor Rebuild Kit 1988-2006 Harley-Davidson CV Carbs
11 reviews $25.70

S&S Cycle Super E Carburetor Kit 1979-84 Harley-Davidson Shovelhead
2 reviews $756.20 $799.95

Lowbrow Customs Premium Stainless Steel Intake Clamp & Seal Kit 1955-1977 Harley-Davidson FL/FX/XL
13 reviews $33.63

Lowbrow Customs Domed Screw-In Gas Cap for Harley-Davidson 1996 & later - Brass
22 reviews $89.06

S&S Cycle Super E Carburetor Kit 1993-99 Harley-Davidson Big Twin
2 reviews $756.20 $799.95

Lowbrow Customs Belt To Chain Conversion Kit 1995-1999 Harley-Davidson Softail - Chrome Sprocket
2 reviews $159.99

Cycle Standard Chrome Fork Neck Cup Kit with Fork Stops for 1949-1987 Harley-Davidson Big Twins
$52.59

Airspeed Cycles Narrow Bottom Ape Hanger Handlebars - 11 inch Rise - 1 inch - Stainless Steel
$175.00

Fast Eddy Co. No. 20 Pinion Gear Locking Tool 1954-1999 Harley Big Twins
7 reviews $99.95

Kustom Tech Vintage Line Forward Controls - Aluminum & Brass - 1986-99 Harley-Davidson FL/FXST
1 review $1,396.03

Lowbrow Customs 21" Front Ribbed Spool Wheel - 3/4" Bearings - Black
9 reviews $351.33

Belt Drives LTD. 8mm/1.5 inch Primary Belt Drive - Electric Start - 1979-E1984 Harley-Davidson Big Twins
1 review $845.50 $890.00

Lowbrow Customs Springer Top Clamp for Standard 3.5" Handlebar Risers
3 reviews $202.45

Til Death Cycles 39mm Extended Damper Tube Kit- Harley-Davidson Front End
29 reviews $104.95

Cycle Standard Isolator Motor Mount - Front - 1991-2017 Harley-Davidson Dyna
7 reviews $117.41

Fast Eddy Co. No. 29 Driver Handle with Wedge Spacer
8 reviews $79.95

Trader Cody's Choppers Midway Mid Controls 1970-1984 Harley-Davidson Shovelhead 1984-1999 Evo - Chrome
$450.00

Cycle Standard Exhaust Flange Kit H-D 1984-13 Big Twins and 1986-13 XL OEM #65328-83 65325-83
18 reviews $36.26

Gasbox Upswept Exhaust Pipe Set for 1970-1984 Harley-Davidson Shovelhead Rigid Applications
1 review $329.95

Belt Drives LTD. 11mm/1.5 inch Primary Belt Drive with Idler Gear - Electric Start - 1965-E1984 Harley-Davidson Big Twin
2 reviews $860.11 $905.38

Cycle Electric Stator CE-8999 for 1989-1999 Harley-Davidson Evo Big Twins with 32 amp Alternator
27 reviews $109.29 $116.99

Prism Supply Co. Sling Shot Clutch Control - Harley-Davidson 5 & 6 Speed - Stainless Steel
4 reviews $324.99

Belt Drives LTD. 8mm/2 inch Primary Open Belt Drive - Kick Start - Spline Shaft - 1955-1984 Harley-Davidson Big Twin
$808.37 $850.92

Lowbrow Customs Belt To Chain Conversion Kit 1984-1994 Harley-Davidson Softail - Black Sprocket
$188.99

Cycle Standard Bayonet / Cam Harley Style Vented 2" Gas Cap - Chrome
53 reviews $22.46

Gasbox Upswept Exhaust Pipe Set 1948-1957 Harley-Davidson Rigid Panhead - Chrome
5 reviews $214.95

Lowbrow Customs Belt To Chain Conversion Kit 1984-1994 Harley-Davidson Softail - Chrome Sprocket
$188.99

Lowbrow Customs Big Twin Harley-Davidson Engine Stand (1936-1999) - Fits Knucklehead, Panhead, Shovelhead, Evo Motors
54 reviews $70.10

Marion Metalworks Universal Headlight Mounting Bracket/Eyebrow Delete
17 reviews $60.00

Cycle Standard 41MM Chrome Fork Tubes 1984-1999 Harley-Davidson FXWG/D FXST - 30-1/4 inch - 6 Over
$214.38

Cycle Standard 41MM Chrome Fork Tubes 1949-1976 Harley-Davidson FL - 26 inch - 6 Over
$207.81

Cannonball Extended Clutch Release Lever for Stealthstarter Electric Starter 1936-1964 4 Speed Harley-Davidson Big Twins
1 review $101.88

Belt Drives LTD. 8mm/1.5 inch Primary Belt Drive - Kick Start - 1955-1964 Harley-Davidson Big Twins
$726.39 $764.62

Drag Specialties Friction Clutch Plate Kit (5-Pack) for 1968-1984 Harley Shovelhead
13 reviews $84.75

Gasbox Upswept Exhaust Pipe Set for 1948-1965 Harley-Davidson Panhead Rigid Applications
$389.95

S&S Cycle Replacement 4 Speed Kicker Cover Kit - Aluminum
2 reviews $234.69 $255.95

Cycle Electric Generator DGV-5006H 6 Volt for 1936-1957 Harley-Davidsons w/Heli Coils
2 reviews $569.01 $609.10

Cycle Standard High Performance Clutch Pressure Plate for Harley Shovelhead Replaces OEM #37871-41
16 reviews $46.94

Cycle Electric Alternator Kit 32 amp CE-32AL - 1988-1999 Harley-Davidson Softail
$367.45 $393.34

Cycle Electric DGV-5000 12V Generator for Harley-Davidson 1965-1984
57 reviews $543.94 $582.26

Prism Supply Co. Harley Jockey Shifter Kit - 5 & 6 Speed Big Twin - Stainless Steel
14 reviews $89.99

Gremlin Wiring Gremlin Wiring Harness Kit for 1989-1999 Harley-Davidson Softail Models
$359.95

Arlen Ness Big Sucker Stage 1 Air Filter Kit - Chrome - 1999-2017 Harley-Davidson Twin Cam
$215.96 $239.95

Fast Eddy Co. No. 12 Float Bowl Drain Valve for S&S Super E / G / B Carburetors
30 reviews $44.95

Gasbox Shovelhead Exhaust Pipe Set 2-into-1 for 1970-84 Harley Cone - Bare Steel OEM #65435-70
28 reviews $214.99

Cycle Standard 41mm Fork Leg Assembly Rebuild Kit 1986-2013 Harley-Davidson FLT/FLHT/FLHX/FLTR 1999-2013 FLHR 1984-2010 FXST 1986-1998 FLST 2000-2017 FLS/FLST 1984-1986 FXWG 1993-2005 FXDWG
2 reviews $79.40

Gasbox Strong Arm Top Motor Mount for Crank Start Key Switch - 1984-1999 Harley-Davidson Big Twin Evolution
1 review $74.95

Cycle Standard Screw-In Harley Stock Style Vented Gas Cap - 1996 & up - Chrome
38 reviews $29.28

Dynatek Performance Electronics 3 Ohm Dual Output HD - For Use With Dyna Electronic Ignitions
3 reviews $132.86

Drag Specialties Complete Advance Unit Assembly 1970-1999 Harley Davidson Big Twin 1971-2003 XL Points Ignition (Except Single Fire Ignition)
6 reviews $44.45

S&S Cycle Super E Carburetor Assembly - Black #110-0133
$522.50 $549.95

Cycle Standard Smooth Stainless Steel Hidden/Internal Stop Fork Neck Cup Kit 1949-1987 Harley-Davidson Big Twins
2 reviews $114.71

Performance Machine Classic 5 Spoke One-Piece Brake Rotor - 11.5 inch - Rear
$164.95

Cycle Electric Rectifying Regulator CE-320L - 1989-1999 Harley-Davidson Softails
13 reviews $162.71 $174.17

Gasbox Strong Arm Top Motor Mount with Coil Mount - 1984-1999 Harley-Davidson Big Twin Evolution
$74.95

Lowbrow Customs T-Bars Handlebars - 10 inch Rise - 1 inch Diameter - Black
25 reviews From $142.92

Lowbrow Customs Throttle Housing 1996 & up Harley Push-In Dual Cable - Aluminum - 1 inch
9 reviews $93.46

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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