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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Colony #3020-8 Head Bolt Set 12 Point 1992-Up Harley-Davidson Big Twin/Twin Cam 1993-Up XL - Zinc Plated
3 reviews $83.00

Lowbrow Customs Deluxe Choke Knob Enricher for Harley-Davidson S&S Super E and G Carburetors - Brass
75 reviews $51.54

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

Colony #2939-26 Complete Springer Rocker Rebuild Kit 1931-1948 Harley-Davidson Big Twin - Parkerized
2 reviews $204.20

Cycle Standard Drilled Stainless Steel Brake Rotor - 11.5 inches - Replaces Harley-Davidson OEM #44156-00
4 reviews $101.89

James Gaskets Motor Gasket Kit W/Alum-Foamet Base 1948-1965 Harley-Davidson Panhead
$101.74

9 Finger Fabrication Engine Case Bore Plug Set - Harley-Davidson Evolution/Shovelhead/Sportster
5 reviews $45.00

Cycle Standard 5 Post Ignition Key Switch Replaces Harley-Davidson OEM #71500-36T - Chrome Bezel
7 reviews $50.55

Cycle Standard 22mm Petcock Harley-Davidson Style - Black - Left Hand Outlet
24 reviews $40.36

Prism Supply Co. Sling Shot Clutch Control - Harley-Davidson 4 Speed - Stainless Steel
1 review $199.99

James Gaskets Fork Seal Rebuild Kit 1975-1984 35mm Harley-Davidson FX and XL Models
6 reviews $22.19

Cycle Electric Generator DGV-2569M 65A 12v for 1936-1957 Harley-Davidsons with 5/16-24 mounting bolts
$395.86 $423.75

Cycle Standard 49mm Fork Leg Assembly Rebuild Kit 2016-2021 Harley-Davidson XL1200X 2018-2023 Softails 2014-2023 FLHT/FLHR/FLHX/FLTRX/FLTRU/FLTRK
1 review $98.23

Mooneyes MOON Pressure Gauge 0-100 psi
5 reviews $49.00

Cycle Electric Alternator Kit CE-22ANBR for 1970-1998 Harley-Davidson Big Twins With No Battery
$388.34 $415.70

Colony #8515 Complete Show Bike Kit Cap Style Hardware 1976-1977 Harley-Davidson Shovelhead - Chrome Plated
$383.08

Colony #7908 Complete Show Bike Kit Acorn Hardware 1958-1965 Harley-Davidson Panhead - Chrome Plated
$383.08

Cycle Standard 41MM Chrome Fork Tubes 1949-1976 Harley-Davidson FL - 22 inch - 2 Over
1 review $189.55

Colony #2322-11 Rocker Arm Cover Stud Kit 1966-1984 Harley-Davidson Shovelhead
4 reviews $47.38

Cycle Standard Nose Cone Cam Gear Cover - Chrome - 1973-92 Harley-Davidson Big Twin
2 reviews $189.33

Cycle Standard Front Brake Master Cylinder Assembly - Chrome - Single Disc 1996-2017 Models (EXCEPT 15-17 Softail, 08-17 Dressers, Trike, 04-17 XL)
2 reviews $188.86 $230.05

Cycle Standard Replacement Dished Sprocket - Chrome - 51 Tooth - 1973-84 Harley-Davidson Big Twin 1979-81 XL OEM #41470-73
1 review $75.02

Lowbrow Customs 60 PSI Harley Oil Pressure Gauge - Black Face
39 reviews $46.85

Gasbox Strong Arm Top Motor Mount With Crank Key Mount 1948-1984 Harley Big Twins
5 reviews $74.95

Cycle Standard 22mm Petcock Harley-Davidson Style - Black - Right Hand Outlet
13 reviews $26.73 $36.84

Cycle Standard 1936-1986 Harley-Davidson Big Twin 4 Speed Kickstarter Rebuild Kit
2 reviews $124.69

Cycle Standard 3 position Ignition Key Switch Replaces Harley-Davidson OEM #71425-77 - Black Body / Black Bezel
16 reviews $41.49

Cycle Standard Mega Nut Sprocket and Pulley Lock Nut for 1993+ Harley Sportster, Big Twin, and Twin Cam
19 reviews $73.66

Cycle Electric Regulator CE-540 for use on 65a 12v Harley-Davidson Generators
28 reviews $181.55 $194.34

Cycle Electric CE-500 Replacement Regulator for DGV-5000 Generator
1 review $180.23 $192.93

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

K&N Air Filters Oil Filter - Chrome - Harley-Davidson Evolution Big Twin Harley and Sportster Models - K&N Part #KN-170C
8 reviews $19.99

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

Drag Specialties Fat Bob Flatside Style Gas Tanks - 1984-1999 Harley-Davidson FXST/FLST 1985-1986 FX/FXWG - 3.5 Gallon
$358.23

Cycle Standard 41MM Chrome Fork Tubes 1949-1976 Harley-Davidson FL - 20 inch - Stock Length
$178.40

Cycle Standard Heel-Toe Shift Lever - 1965-1984 Harley-Davidson FL/FLH (With Splines) - Chrome - OEM #34692-74TA
$59.36

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

James Gaskets Complete Rocker Cover Gasket Kit 1984-1991 Harley-Davidson Evo Big Twin
$88.41

Cycle Standard Front Fender - Harley-Davidson 1973-up XL FX FXR 35mm 39mm Narrow Glide Front Forks - OEM #59031-83
7 reviews $87.92

Cycle Standard Bendix Zenith Carburetor Rebuild Kit with Viton Needle OEM #27132-71
12 reviews $31.96

Lowbrow Customs 21" Front Ribbed Spool Wheel - Black
9 reviews $351.33

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

Cycle Standard Fork Neck Cup Set for 1948-1986 Harley-Davidson Big Twins OEM #48311-60
4 reviews $50.00

Gasbox Open Belt Drive Primary License Plate Mount for Harley - Vertical or Horizontal
4 reviews $69.95

James Gaskets Complete Motor Gasket Kit - Shovelhead 1966 - 1984
8 reviews $116.17

Cycle Standard 39mm Damper Tube Kit - 9.5" - 1994-1996 Harley-Davidson Sportster XL 1995-2017 FXD OEM# 45925-94
$69.00

Performance Machine 1 inch Contour Billet Clutch Lever Assembly - Chrome
$343.95

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

Hawg Supply Carburetor Support Bracket for Harley-Davidson Ironheads and Shovelheads with Fuel Filter
$84.99

Lowbrow Customs Competition Screw-In Gas Cap for Harley-Davidson 1996 & later - Polished
41 reviews $42.30 $51.64

Lowbrow Customs Lowbrow Customs Springer Lil Speedies Handlebars - 1 inch - Raw
5 reviews $168.70

S&S Cycle 2.5 inch Velocity Stack for S&S Super E/G Carburetor
2 reviews $183.95

Cycle Standard Super Nut for Harley-Davidson Four Speed Transmission - OEM #35211-36
26 reviews $33.18

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

2 $165.56 $183.95

Cycle Standard Chrome 12V Coil 1947 & Up Harley-Davidson
6 reviews $66.20

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

Fast Eddy Co. No. 25 Tappet Axle / Roller Replacement Tool
$329.95

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

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

Cycle Standard Direct OEM Replacement Chrome Oil Tank for 1965-1982 Harley-Davidson 4 Speed Models
2 reviews $164.94

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

Gasbox 35mm Harley-Davidson Narrow Glide Headlight Mount - Tumbled Stainless
14 reviews $29.95

Gasbox Big Twin Voltage Regulator Mount
27 reviews $21.95

Lowbrow Customs PVC Spacer Kit For Extended 39mm Fork Tubes
1 review $14.26

Autolite Spark Plug- 1966-1974 Shovelhead/ 1948-1968 Panhead - Manufacturer Part #4275
9 reviews $6.27

Mooneyes 3 quart Traditional Chopper Oil Tank for Harley-Davidson Choppers
9 reviews $325.00

Drag Specialties 6-1/2 inch Pullback Handlebar Riser Set - Chrome
$162.13

Dynatek Performance Electronics 2000-HDE PC-Programmable Digital Ignition Module - Single or Dual Fire 1990-93 Harley-Davidson XL 1991-95 FX Models
1 review $322.21

Cycle Standard Replacement Front Springer Fork Fender 1993-Up Harley-Davidson FXSTS
$64.31

Cycle Standard 22mm Petcock Harley-Davidson Style - Chrome - Right Hand Outlet
18 reviews $40.05

LCFabrications Micro Switch Housing - Clutch Side - Double - Black - 1982-1995 Harley-Davidson
$80.00

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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