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

Sort by

Lowbrow Customs Bolt On 3/4 inch Ignition Key Switch Bracket for Harley-Davidson Four Speed Transmissions - Tumbled Stainless
13 reviews $21.79

James Gaskets Exhaust Port Gasket 1982-Up Harley-Davidson
8 reviews $11.66 $14.57

Cycle Standard 10-stud Clutch Hub Puller
22 reviews $45.39

Cycle Standard 22mm Petcock Round Body Solid Brass Harley-Davidson Style - Left Side Position
14 reviews $66.88

American Prime Mfg. Cast Alternator Shroud Cover for Open Belt Drives fits 1970-2006 Harley-Davidson Big Twins - Polished
$72.09

Prism Supply Co. Bristol Breather - CV Carburetor - Polished
$60.00

Fast Eddy Co. No. 21 Wrist Pin Bushing Installer / Remover
13 reviews $89.95

Lowbrow Customs 39mm Fork Shrouds - Black - 1987-Up - Harley-Davidson Sportsters
51 reviews $119.18

Gasbox Strong Arm Top Motor Mount 1948-84 Harley Big Twins
5 reviews $69.95

Lowbrow Customs Pursuit Shifter Peg for Harleys - Solid Brass
40 reviews $51.01

Lowbrow Customs Finish Line Foot Peg Set - Black Aluminum
13 reviews $95.59

Lowbrow Customs Rabbit Ears Handlebars - 1 inch - Black
17 reviews From $131.89

S&S Cycle High Performance Hydraulic Tappet Set - 1984-99 Harley-Davidson Big Twin 1986-90 XL
1 review $343.76 $381.95

V-Twin Manufacturing MCM Slash Cut Drag Pipes 1971-1984 Harley-Davidson Shovelhead - Chrome
1 review $170.14

V-Twin Manufacturing Forged Floorboard Tab Set for 1 inch Tubing
$56.57

Lowbrow Customs Pursuit Shifter Peg for Harleys - Raw Aluminum
27 reviews $29.55

Lowbrow Customs Spare Parts Book for 1971-1980 Harley-Davidson FX
22 reviews $42.03

Cycle Standard Replacement Dished Sprocket - Chrome - 47 Tooth - 1973-1985 Harley-Davidson Big Twin 1979-81 XL
$66.80

Mid-USA 21 x 2.15 Black Complete Front Wheel fits Harley-Davidson Sportster XL & FX 1984-1999
11 reviews $334.00

Cycle Standard Heavy Duty Chrome Kicker Lever 1936-1977 Harley-Davidson Big Twin 1957-1976 XL
7 reviews $61.85

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

Burly Brand Narrow Bottom Ape Hanger Handlebars - 1 inch - 16 inch Rise - Chrome

2 $165.56 $183.95

Burly Brand Ape Hanger Handlebars - 1 inch - 12 inch Rise - Chrome

2 $165.56 $183.95

Colony #3082-7 Seat Spring Upper and Lower Set 1958-Up Harley-Davidson Swingarm Big Twins
1 review $82.50

Cycle Standard Chrome 12V Coil 1947 & Up Harley-Davidson
4 reviews $58.92

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

Cycle Standard 5-1/2 inch Forged Aluminum Handlebar Risers - Black
$82.46

Cycle Standard 5-1/2 inch Pullback Handlebar Riser Set - Chrome
$82.46

Fast Eddy Co. No. 49 Neck Cup Removers
4 reviews $54.95

Cycle Electric Rectifying Regulator CE-324 32 Amp - 1999-2003 Harley-Davidson Dynas
1 review $163.63 $175.16

Cycle Standard 41MM Chrome Fork Tubes 1984-1999 Harley-Davidson FXWG/D FXST - 24-1/4 inch
$162.55

Cycle Electric Rectifying Regulator CE-320 - 1989-1996 Harley-Davidson FL 1989-1998 FXD FXR
19 reviews $161.10 $172.45

Lowbrow Customs Competition Screw-In Gas Cap for Harley-Davidson 1996 & later - Polished
37 reviews $40.29 $49.18

Lowbrow Customs 39mm Solid Riser Bushings for Harley-Davidson - Black
20 reviews $32.02

Lowbrow Customs Premium Stainless Steel Exhaust Clamps 1948-1965 Harley-Davidson Panhead
$22.87

Colony #7135-8 Custom Pushrod Covers - 1949-1984 Harley-Davidson Panhead/Shovelhead - Chrome Plated
5 reviews $80.00

Lowbrow Customs Dished Screw-In Gas Cap for Harley-Davidson 1996 & later - Brass
16 reviews $79.27

Lowbrow Customs Radius Fork Tube Caps - Chrome - 39mm Narrow Glide Front End
5 reviews $39.62

Cycle Standard Nose Cone Cam Gear Cover - Black- 1973-92 Harley-Davidson Big Twin
$174.03

Lowbrow Customs Lowbrow Customs Springer Lil Speedies Handlebars - 1 inch - Raw
$155.99

Lowbrow Customs Harley-Davidson 4 Speed Transmission Work Stand
22 reviews $37.12

Drag Specialties Hydraulic Brake Light Switch 1984-99 Harley-Davidson FLST/FX/FXST/FXR 79-85 XL 91-98 Dyna 71-84 FX 80-98 FLT 82-83 FXR
6 reviews $20.75

Yost Performance Products Inc. Intake Manifold Wrench for 1984 & up Big Twin & XL Sportsters
36 reviews $11.95

Cycle Standard 22mm Petcock Harley-Davidson Style - Black - Right Hand Outlet
13 reviews $25.46 $35.09

Cycle Standard 5 Post Ignition Key Switch Replaces Harley-Davidson OEM # 71500-36T - Chrome Bezel
5 reviews $43.76

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

Drag Specialties Front Brake Master Cylinder Assembly - Black - Dual Disc 1982-85 Harley-Davidson Big Twin and Sportster XL
$303.80

Fast Eddy Co. No. 2 Pinion Nut Socket 1954-1992 Harley Big Twins
17 reviews $37.95

Drag Specialties High Performance Starter Solenoid 1965-1984 Harley-Davidson Big Twin 4 Speed 1967-1980 XL 1984-1988FXST/FLST 1985-1986 FXWG/FXSB
$75.87

Drag Specialties Neck Post Bearing and Race Set 1980-13 Harley-Davidson FLT/FLHT 99-13 FLTR/FLHR 60-86 FL/FX/FXWG 84-17 FXST/FLST 99-17 Dyna 82-21 XL
$30.11

Colony #8311 CAD Complete Stock Hardware Kit - 1970-1975 Harley-Davidson Shovelhead - CAD Plated
1 review $300.09

Cycle Standard 35MM Chrome Fork Tubes - 23-1/4 inch - Stock Length
2 reviews $166.66

Hawg Supply Bolt-On Mid Peg Mounts 1970-1999 Harley-Davidson Big Twins
$99.99

Mullins Chain Drive Richmond Spool Hub - Black
$299.95

Cycle Standard 2 Position Ignition Key Switch Replaces Harley-Davidson OEM #71428-90A
20 reviews $36.38

Lowbrow Customs 39mm Low Profile Fork Caps - Black Anodized Aluminum

10 $51.64

Colony #2548-8 Clutch Hub Nut Kit 1941-1984 Harley-Davidson Big Twin - Parkerized
14 reviews $20.57

Colony #3254-6 Exhaust Pipe Locking Bolt Mounting Kit 1966-1984 Harley-Davidson Shovelheads - Zinc Plated
12 reviews $22.00

Cycle Standard Fork Neck Cup Set 1948 -1986 Harley-Davidson Big Twin OEM #48311-60
4 reviews $43.29

Cycle Standard High Performance Clutch Pressure Plate for Harley Shovelhead Replaces OEM 37871-41
15 reviews $40.64

Cycle Standard Speedometer Mounting Gasket for Harley-Davidson 1989 - 1991 Sportster XL Models and 1987 - 1994 FXR OEM #67104-83
27 reviews $14.82

Cycle Standard 5-1/2 inch Pullback Handlebar Riser Set - Black
$82.46

Progressive Suspension Heavy-Duty Fork Springs 1999-2005 Harley-Davidson FXD FXDC FXDL 2004-15 XL Models
2 reviews $139.95

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

Mid-USA Rear Master Cylinder - 1958-72 Harley-Davidson Big Twin - Replaces OEM 41761-58 41761-78
5 reviews $69.95

Hugh's Handbuilt HHB Harley Davidson Sprocket Lock System - Black Anodized
$69.89

Cycle Standard Kickstand Spring 1936 - 1987 Harley-Davidson Big Twins / Pre 1984 Ironhead Sportster Models - Chrome - OEM #50011-30
43 reviews $7.47

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

Fast Eddy Co. No. 30 Wheel Bearing Race Remover / Installer
5 reviews $54.95

Cycle Electric LeBeef CE-500L-CP Replacement Regulator for DGV-5000L Generator
$274.66 $294.02

James Gaskets Exhaust Port Gasket Kit - Thick Graphite Wire Gaskets & Hex Nuts - 1984-Up Harley-Davidson Evo/Twin Cam 1986-2022 XL
$24.95

Lowbrow Customs Finned Thread-In Gas Cap for Harley-Davidson 1996 & later - Polished
30 reviews $48.84

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.

Read less

Harley-Davidson Big Twin Parts FAQ

STAY CONNECTED
WITH LOWBROW

NO SPAM, EVER. JUST GREAT STUFF. YOUR INFO IS NEVER SHARED.