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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Gasbox Full Rigid Frame 1936-1999 Harley-Davidson Big Twin 5 Speed - Frisco Tank Mounts - Horseshoe Oil Tank
$1,799.00

Gasbox Full Rigid Chopper Frame 1936-1999 Harley-Davidson Big Twin 4 Speed - 3" Up - Frisco Tank Mounts - Horseshoe Oil Tank
$1,799.00

Gasbox Full Rigid Frame 1936-1999 Harley-Davidson Big Twin 4 Speed - Frisco Tank Mounts - Horseshoe Oil Tank
3 reviews $1,799.00

Cycle Electric Rectifying Regulator CE-606- 2006-2008 Harley-Davidson FLH FLT
33 reviews $221.97 $237.61

Cycle Standard Exhaust Flange Kit H-D 1984-13 Big Twins and 1986-13 XL OEM #65328-83 65325-83
18 reviews $32.96

Lowbrow Customs Big Twin Harley-Davidson Engine Stand (1936-1999) - Fits Knucklehead, Panhead, Shovelhead, Evo Motors
53 reviews $65.51

Timken Neck Post Bearing & Race Set Made in USA
17 reviews $28.14

American Prime Mfg. Comp Master Ignition Advance Unit - 1970-Up Harley-Davidson Replaces OEM #3251770T
6 reviews $88.21

V-Twin Manufacturing Chrome Fork Neck Cup Kit for Harley-Davidson Big Twins
11 reviews $78.37

Cycle Standard Smooth Stainless Steel Hidden / Internal Fork Stop Kit 1949-1987 Harley-Davidson Big Twins
2 reviews $109.25

Cycle Electric CE-84T-99 Stator Rotor and Regulator Kit for 1999 - 2003 Harley-Davidson FLH and FLT Models
21 reviews $545.16 $583.57

Cycle Electric Alternator Kit CE-81A-97R 1997-1998 Harley-Davidson FLH/FLT/FXR
$543.97 $582.29

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

S&S Cycle Replacement 4 Speed Kicker Cover Kit - Aluminum
2 reviews $230.36 $255.95

Drag Specialties Friction Clutch Plate Kit (5-Pack) for 1968-1984 Harley Shovelhead
13 reviews $82.35

Dynatek Performance Electronics 2000I PC Programmable Electronic Ignition Kit for Harley-Davidsons - Includes Module and DC-6-5 Twin Fire II Mini Coil
2 reviews $513.32

Cycle Standard 5 Stud Clutch Hub Assembly - Harley-Davidson Big Twins 1941-1984 OEM #37550-41B
6 reviews $108.81

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

Prism Supply Co. Sling Shot Hydraulic Brake Pedal Kit - Harley-Davidson Cone Engine - Stainless Steel
$249.99

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

Drag Specialties 5 ohm Dual Fire Coil - for Points Ignition
16 reviews $77.95

Cycle Standard Wagner Lockheed Type Rear Disc Brake Master Cylinder - Chrome - 1973-E1979 Harley-Davidson FL/FX
1 review $104.83

Cycle Standard Bobbed Rear Fender With 1973-Up Light Mount for 1984-1999 Harley-Davidson Softail
3 reviews $182.76

Cycle Standard 41MM Chrome Fork Tubes 1984-1999 Harley-Davidson FXWG/D FXST - 30-1/4 inch - 6 Over
$208.14

V-Factor Motorcycle Parts MCM Slash Cut Drag Pipes 1986-2006 Harley-Davidson Softail - Chrome
4 reviews $129.99

Mooneyes Finned Points Cover for Harley-Davidson Big Twins
36 reviews $67.67

Lowbrow Customs 39mm Solid Handlebar Riser Bushings for Harley-Davidson - Aluminum
33 reviews $33.62

Cycle Electric Alternator Kit CE-60AR for 1970-1984 Harley-Davidson 4 Speed Solid Mount Motors
$470.33 $503.46

Lowbrow Customs Belt to Chain Conversion Kit Harley-Davidson Dyna 2000-05 Mag Wheels - Black Sprocket
3 reviews $199.99

Belt Drives LTD. BDL 8mm 1.5" Primary Belt Drive – Electric Start – 1965-1978 Harley Shovelhead
$694.40 $730.95

Lowbrow Customs 21" Front Ribbed Spool Wheel - 3/4" Bearings - Black
9 reviews $341.10

Morris Magneto MM74e Magneto for Harley Davidson Big Twins 1936 - 1969 Pan / Shovel - Brushed Finish
6 reviews $1,359.75

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

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

Cycle Standard Chrome Kickstand Kit - 1966 - 1986 Harley-Davidson FL FX
15 reviews $110.85

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

Cycle Electric Rectifying Regulator CE-320 - 1989-1996 Harley-Davidson FL 1989-1998 FXD FXR
23 reviews $162.71 $174.17

Cycle Standard 35MM Chrome Fork Tubes - 27-1/4 inch - 4 Over
5 reviews $185.61

Cycle Electric LeBeef Generator DGV-5000-L-CP 12 Volt - Low Voltage - 1965-1984 Harley-Davidson
$638.37 $683.35

Gasbox Exhaust Pipe Set 1966-1969 Harley-Davidson Generator Shovelhead FL FLH 74 ci - Bare Steel
2 reviews $249.99

Cycle Electric Generator DGV-2569 65A 12v for 1936-1984 Harley-Davidsons
13 reviews $408.86 $437.67

Lowbrow Customs Throttle Housing 1996 & up Harley Push-In Dual Cable - Aluminum - 1 inch
8 reviews $87.35

Gremlin Wiring Gremlin Wiring Harness Kit for 1949-1999 Kick-Only Shovelhead & Big Twin Models
1 review $199.99

Belt Drives LTD. 8mm/1.5 inch Primary Belt Drive - Kick Start - 1936-1954 Harley-Davidson Big Twins
$596.55 $627.95

Old-Stf Cycle Shovelhead Rocker Box Split Oil Lines - Brass
29 reviews $91.43

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

Lowbrow Customs Motorcycle Neck Cup & Bearing Race Installer Tool
4 reviews $46.95

Lowbrow Customs Lowbrow Customs Springer Lil Speedies Handlebars - 1 inch - Chrome
2 reviews $192.81

Cycle Electric Alternator Kit CE-81AR 1989-1996 Harley-Davidson FLH/FLT/FXR
$575.74 $616.31

Mid-USA Forward Controls 1936-1999 Harley-Davidson Big Twin - 5/8" Bore - Black Billet
1 review $383.40

Cycle Standard Drilled Stainless Steel Brake Rotor - 11.5 inches - Replaces Harley-Davidson OEM #44136-84A, 44136-92
$95.22

Lowbrow Customs Throttle Housing 1981-1995 Harley Thread-In Single Cable - Aluminum - 1 inch
14 reviews $87.35

Andrews EV27 Camshaft - 1984-1999 Harley-Davidson Big Twin
$226.76 $251.95

Belt Drives LTD. 11mm/1.5 inch Primary Belt Drive - Kick Start - Tapered Shaft - 1936-1954 Harley-Davidson Big Twin
1 review $556.65 $585.95

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 $74.21

Lowbrow Customs Rear Suspension Delete Kit 1984-1999 Harley-Davidson Softails
$185.39

Drag Specialties Complete Advance Unit Assembly 1970-1999 Harley Davidson Big Twin 1971-2003 XL Points Ignition (Except Single Fire Ignition)
6 reviews $64.43

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

Lowbrow Customs Dimpled Steel Motorcycle Oil Tank for H-D Sportster Big Twin and Universal Choppers
29 reviews $218.39

Cycle Electric Alternator Kit CE-22AR for 1970-1988 Harley-Davidson Big Twins
$362.34 $387.87

Cycle Standard Nose Cone Cam Gear Cover - Chrome - 1973-92 Harley-Davidson Big Twin
2 reviews $180.31

Til Death Cycles 49mm Harley-Davidson Front End Extended Damper Tube Kit
5 reviews $119.12

Lowbrow Customs Belt to Chain Conversion Kit Harley-Davidson Dyna 1994-99 - Chrome Sprocket
2 reviews $207.99

Lowbrow Customs Belt to Chain Conversion Kit Harley Davidson Dyna Twin Cam 2006-2017 - Black Sprocket
15 reviews $207.99

Cycle Standard 41MM Chrome Fork Tubes 1984-1999 Harley-Davidson FXWG/D FXST - 28-1/4 inch - 4 Over
$206.97

Lowbrow Customs Deluxe Choke Knob Enricher for Harley-Davidson S&S Super E and G Carburetors - Brass
75 reviews $46.85

Cycle Standard Nose Cone Cam Gear Cover - Chrome - 1993-99 Harley-Davidson Big Twin
3 reviews $145.81

Lowbrow Customs Pursuit Foot Peg Set - Brass
38 reviews $167.35

Mullins Chain Drive 39mm Super Narrow Triple Trees Set
18 reviews $500.00

Lowbrow Customs Belt to Chain Conversion Kit Harley-Davidson Dyna 1994-99 - Black Sprocket
11 reviews $199.99

Prism Supply Co. 10 Degree Kickstand Adjustment Plate for Harley-Davidson Jiffy Stands
$49.99

Lowbrow Customs Louvered Air Cleaner for Harley CV / EFI 1991-2020 - Black
51 reviews $76.43

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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