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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S&S Cycle Super E Carburetor Assembly - Black #110-0133
$494.96 $549.95

Cycle Standard Screw-In Harley Stock Style Vented Gas Cap - 1996 & up - Chrome
38 reviews $26.62

9 Finger Fabrication Adjustable Magnetic Lifter Holder - Harley-Davidson Evolution/Twin Cam/M8
16 reviews $35.00

Cycle Electric Rectifying Regulator CE-203 - 1976-1980 Harley-Davidson Big Twins
12 reviews $162.21 $173.64

Cycle Standard Ignition Advance Unit WIth Bolt 1970-Up Harley-Davidson OEM# 3251770T
4 reviews $35.84

Lowbrow Customs Springer Top Clamp for Standard 3.5" Handlebar Risers
3 reviews $192.81

Cycle Standard 35MM Chrome Fork Tubes - 31-1/4 inch - 8 Over
1 review $189.62

Lowbrow Customs Premium Stainless Steel Intake Clamp & Seal Kit 1955-1977 Harley-Davidson FL/FX/XL
10 reviews $30.57

Airspeed Cycles T-Bar Handlebars - 12 inch Rise - 1 inch - Stainless Steel
1 review $235.00

Lowbrow Customs Pursuit Foot Peg Set - Raw Aluminum
17 reviews $103.74

Cycle Standard Filler Neck- Thread In Style Gas Cap Weld In Bung- Right Hand Thread -1996 & Up Caps - Vented
8 reviews $12.93

Lowbrow Customs Louvered Air Cleaner for S&S Super E / G Carburetors - Chrome
37 reviews $76.43

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

Dynatek Performance Electronics Twin Fire II Single Fire Miniature 3 Ohm Coil
1 review $182.21

Progressive Suspension 412 Series 12" Shocks Chrome With Full Covers 1973-1986 Harley-Davidson Shovelheads
$454.95

Andrews N2 Camshafts - 1991-1999 Harley-Davidson Sportster XL 1994-99 Buell
$454.46 $504.95

Cycle Standard 22mm Petcock Harley-Davidson Style - Chrome - Straight Outlet
18 reviews $36.35

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

Lowbrow Customs 39mm Narrow Glide Fork Brace - Standard Width
3 reviews $149.96

Lectron Lectron Billetron Carburetor for 53-100 Cubic Inch Harley-Davidsons
$899.00

Cycle Standard Mega Nut Sprocket and Pulley Lock Nut for 1993+ Harley Sportster, Big Twin, and Twin Cam
19 reviews $68.84

Andrews 4-Speed Gear Set 1936-76 Harley-Davidson Big Twin - Stock Ratio
$890.96 $989.95

Cycle Standard Polished Clutch Lever Assembly - 1968-1971 FL/FX 1971-1972 XL - OEM #38608-68
4 reviews $26.96

Dynatek Performance Electronics 5 ohm Dual Fire Coil - for Points Ignition
4 reviews $125.54

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

Cycle Standard 39mm Fork Leg Assembly Rebuild Kit 1988-2022 Harley-Davidson XL 1991-1998 FXD 1987-2000 FXR
$79.20

Cycle Standard Black 12V Square Coil 1948-60 Harley-Davidson Big Twins
1 review $108.87

Cycle Standard 41MM Chrome Fork Tubes 1984-1999 Harley-Davidson FXWG/D FXST - 32-1/4 inch - 8 Over
$217.13

Cycle Electric Stator CE-3845-02 for 2002 - 2005 Harley-Davidson FLH and FLT Models
11 reviews $143.49 $153.60

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

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

Cycle Standard Drilled Stainless Steel Brake Rotor - 11.5 inches - Rear - Replaces Harley-Davidson OEM #41789-92
$95.46

American Prime Mfg. Cast Alternator Shroud Cover for Open Belt Drives fits 1970-2006 Harley-Davidson Big Twins - Raw Finish
$33.68

Bates BattBoy 65 Battery Box 1965-84 Harley-Davidson FL FLH and 1967-78 XL
9 reviews $119.81

Cycle Standard 8 inch Forged Aluminum Handlebar Risers - Chrome
1 review $119.70

Cycle Standard Front Fender - Chrome - Harley-Davidson 1973-up XL FX FXR 35mm 39mm Narrow Glide Front Forks - OEM #59031-83
19 reviews $104.67

V-Twin Manufacturing Mid Brake Control Kit 1979-1982 Harley-Davidson FX/FXE
$208.49

Cycle Electric LeBeef CE-540L-CP Replacement Regulator for use on 12v Harley-Davidson Generators
$275.99 $295.43

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

Cycle Electric Generator DGV-2569H 65A 12v for 1936-1957 Harley-Davidsons with 1/4-24 mounting bolts
$409.79 $438.66

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

Gasbox Big Twin CV Carburetor Support Bracket - 1985-1999 Harley-Davidson Evolution Big Twin
29 reviews $27.99

S&S Cycle Quickee Adjustable Pushrod Set - 1984-1999 Harley-Davidson Big Twin
2 reviews $202.46 $224.95

Gasbox Tall Chopper Bolt On Sissy Bar - 2006-2017 Dyna
21 reviews $134.95

Gasbox Evo Sportster CV Carburetor Support Bracket - 1991-2006 Harley-Davidson Sportsters - Tumbled Aluminum
26 reviews $34.95

S&S Cycle Throttle Cable Guide - Use a CV Cable on an S&S Super E/G Carburetor
8 reviews $38.27 $40.95

Gasbox Complete Hardware Kit for Gasbox Rigid Big Twin Frames with Frisco Tanks
$99.95

Old-Stf Cycle Shovelhead Rocker Box Split Oil Lines - Stainless & Black
$99.95

Cycle Standard 3 position Ignition Key Switch Replaces Harley-Davidson OEM #71425-77 - Chrome Body / Chrome Bezel
18 reviews $37.80

Cycle Standard 3 position Ignition Key Switch Replaces Harley-Davidson OEM #71425-77 - Black Body / Black Bezel
16 reviews $37.72

Lowbrow Customs Throttle Housing 1996 & up Harley Push-In Dual Cable - Black - 1 inch
18 reviews $98.27

Mooneyes 60 psi Oil Pressure Gauge
36 reviews $49.00

Cycle Standard Clutch Shell With Starter Ring 1970-E1984 Harley-Davidson Big Twins - OEM #37702-70A
$259.14

S&S Cycle Precision Hydraulic Tappet Set 2000-Up Harley-Davidson XL 2017-Up M8 1999-17 Twin Cam
$251.96 $279.95

Fork Co., Ltd Riser Clamp for Fork Sixties Narrow Bars - Single Clamp - Polished
$374.94

PanAm Oils Inc. Oil/Ignition Shut-Off Valve Pre-2000 Harley-Davidson
$249.49

Cycle Standard 6 Post Ignition Key Switch Replaces Harley-Davidson OEM #71501-73A - Chrome Bezel
12 reviews $46.16

Cycle Standard Wagner Lockheed Type Rear Drum Brake Master Cylinder - Chrome - 1958-1972 Harley-Davidson FL 1971-1972 FX
$104.83

Cycle Standard Isolator Motor Mount - Rear - 1991-1998 Harley-Davidson Dyna
$104.66

Cycle Electric Regulator CE-540L for use on 12v Harley-Davidson Generators
22 reviews $181.55 $194.34

Gasbox S&S Carburetor Support Bracket - Harley-Davidson Shovelhead - Tumbled Stainless
54 reviews $21.95

Trader Cody's Choppers Rotary Top Shift Lever 1979-1986 Harley-Davidson Transmissions 4 Speeds - Stainless Steel
2 reviews $30.00

Mooneyes MC Motorcycle Chopper Oil Tank for Harley-Davidson Choppers
10 reviews $360.00

Lowbrow Customs Belt To Chain Conversion Kit 1984-1994 Harley-Davidson Softail - Chrome Sprocket
$179.99

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

Fast Eddy Co. No.11 Motorcycle Neck Bearing Cup Installer
9 reviews $239.95

Lowbrow Customs Radius Breather Bolts for Harley-Davidson Evo - Brass
35 reviews $44.99

V-Factor Motorcycle Parts 18 Spoke Stainless Steel Brake Rotor - 11.5 inches - Rear - Replaces Harley-Davidson OEM #41789-92/41797-00
$65.40

Prism Supply Co. Bristol Breather - CV Carburetor - Tumbled
1 review $55.00

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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