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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Burly Brand Scrambler Handlebars - 1 inch - Black

1 $171.86 $190.95

Drag Specialties Fat Bob Style Gas Tanks - 1984-1999 Harley-Davidson FXST/FLST 1985-1986 FX/FXWG - 5 Gallon
$343.39

Lowbrow Customs Harley-Davidson Crankshaft Turning / Rotating Tool - 1954 - 2005 Big Twin
10 reviews $38.14

Lowbrow Customs Harley-Davidson 4 Speed Transmission Work Stand
23 reviews $42.88

Drag Specialties Wheel Bearings and Races for Harley-Davidson OEM #9267
$42.56

Lowbrow Customs FiltroMax Belt Drive Mounting Bracket
11 reviews $26.15

Cycle Standard Rocker Box D-rings - Polished - 1948-65 Harley-Davidson Panhead
$111.74

Drag Specialties Clutch Cable Harley-Davidson 4 Speed Big Twin 1968-86 - 56" Long
2 reviews $66.73

Lowbrow Customs 39mm Solid Riser Bushings for Harley-Davidson - Black
22 reviews $36.98

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

Cycle Standard Wagner Lockheed Type Rear Drum Brake Master Cylinder - Chrome - 1958-1972 Harley-Davidson FL 1971-1972 FX
$110.07

Old-Stf Cycle Old-STF Cycle Shovelhead Aluminum Carburetor Intake Support Bracket
$66.00

Colony #3081-7 Seat Spring Upper and Lower Set 1936-1957 Harley-Davidson Rigid Big Twin
3 reviews $82.50

Hawg Supply Ratchet Top Shifter - Bend-Back
1 review $109.99

Colony #2012-8 Head Bolt Set 12 Point 1992-Up Harley-Davidson Big Twin 1993-Up XL - Chrome Plated
5 reviews $109.99

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

Cycle Standard Chrome Headlight Eyebrow Visor for Harley Sportster FX FX FXR - No Indicator Light Mounting Holes
2 reviews $54.76

Cycle Standard Oil Temperature Dipstick OEM #62635-79 Harley-Davidson 1970-84 Big Twin 1984-94 FXR 1987-92 FLT 1970-78 XL
12 reviews $36.37

Lowbrow Customs Pursuit Foot Peg Set - Raw Aluminum
18 reviews $108.93

Colony #2548-8 Clutch Hub Nut Kit 1941-1984 Harley-Davidson Big Twin - Parkerized
16 reviews $25.00

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

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

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

Cycle Standard 49mm Fork Leg Assembly Rebuild Kit 2006-2017 Harley-Davidson Dyna Glide Models w/8mm and 14mm Damper Bolts
$106.55

Drag Specialties Billet Flange Carb Adapter - Mount Mikuni or CV carb to Harley-Davidson Evo Big Twin/Panhead/Shovelhead/Ironhead Models
13 reviews $45.46

LePera Bare Bones Solo Seat - Smooth - fits 1984-1999 Harley-Davidson Softail
1 review $318.00

Bates CV Carb Choke Relocation Bracket - fits Harley Sportster, Dyna, FXR, Softail
22 reviews $18.63

Cycle Standard Primary Chain Adjuster Kit - 1965-2000 Harley-Davidson Big Twin
3 reviews $78.99

Lowbrow Customs Throttle Housing 1981-1995 Harley Thread-In Single Cable - Black - 1 inch
7 reviews $105.15

Cycle Standard Exhaust Port Gaskets - 1966-1984 Harley-Davidson FX/FL OEM# 65843-68A - 2 Pack
$12.10

Colony #8302 CHR Complete Stock Hardware Kit - 1948-1957 Harley-Davidson Panhead - Chrome Plated
$308.88

Cycle Standard Drilled Stainless Steel Brake Rotor - 11.5 inches - Rear - Replaces Harley-Davidson OEM #41789-92
$102.14

Lowbrow Customs Finned Exhaust Flanges 1984-2025 Harley-Davidson Big Twin and 1986-2022 XL (Except Revolution Sportster)
$76.43

Lowbrow Customs Rogue Rear Fender Strut Set 1958 - 1984 Harley-Davidson Panhead Shovelhead
17 reviews $101.87

Lowbrow Customs Primary Drive Clutch Locking Tool for Harley-Davidson Big Twins 1940-84
23 reviews $38.14

Colony #3252-6 Locking Exhaust Pipe Bolt Kit 1966-1984 Harley-Davidson Shovelhead - Chrome Plated
8 reviews $27.50

Lowbrow Customs Locking Tab Washer for Harley-Davidson Rear Wheel Pulley / Sprocket - Tumbled Stainless
24 reviews $12.57

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

Hawg Supply No Mess Oil Drain Valve For Harley-Davidson 5/8-18 thread
1 review $59.99

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

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

Bare Knuckle Performance 39mm Narrow Glide "The Clinch" Fork Brace - Gloss Black
1 review $299.00

Cycle Standard Mesh Air Cleaner - Black - Harley-Davidson CV Carb Sportster and Big Twin
30 reviews $98.65

Colony #8301 PARK Complete Stock Hardware Kit - 1940-1947 Harley-Davidson Knucklehead - Parkerized
1 review $295.30

Colony #8793-5 Disc Front Brake Rotor to Hub Torx Screw Kit 1984-Up FX/FXR/FLT/XL - Chrome Plated
11 reviews $14.52

Cycle Standard Oil Temperature Dipstick OEM #62668;828-87 Harley-Davidson 1984-99 Softail FXST FLST 1979-2003 XL
29 reviews $36.28

The Speed Merchant 39 mm Fork Preload Adjuster - Raw Machined Finish
$143.96 $159.95

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

Cycle Standard Transmission Sprocket .5" Offset - 24 Tooth - 1991-2006 Harley-Davidson XL 1986-2006 Big Twin 5-Speed
$70.34

Drag Specialties Clutch Cable OEM #38618-68C Harley-Davidson 4 Speed Big Twin 1968-1986
$56.13

Motone Screw-In Billet Adapter for 2.5" Monza Gas Cap for 1996 & later Harley-Davidson
5 reviews $56.08 $69.64

Lowbrow Customs Throttle Housing 1981-1995 Harley Thread-In Dual Cable - Aluminum - 1 Inch
5 reviews $93.46

Unity Manufacturing Hydraulic Pushrod Wrench Set
3 reviews $35.00

Gasbox Front Exhaust Pipe 1948-1965 Harley-Davidson Panhead - Chrome - OEM #65440-48
2 reviews $70.00

LCFabrications "The OG" Brake Switch Pod Delete - Polished - for Harley-Davidson
16 reviews $35.00

Cycle Standard Heavy Duty Chrome Kicker Lever 1936-1977 Harley-Davidson Big Twin 1957-1976 XL
8 reviews $69.49

Cycle Standard Ignition Advance Unit WIth Bolt 1970-Up Harley-Davidson OEM# 3251770T
4 reviews $39.42

Drag Specialties 4-1/2 inch Pullback Handlebar Riser Set - Black
$137.75

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

Clymer Manuals 1966 - 1984 Harley Davidson Shovelhead Manual
15 reviews $54.95

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

Lowbrow Customs Dual 4-1/2 inch Bottom Mount Headlight Bracket - Harley Narrow Glide, Triumph, BSA - Tumbled Stainless
5 reviews $45.76

Lowbrow Customs Bottom Mount Headlight Bracket - Harley Narrow Glide, Triumph, BSA - Tumbled Stainless
7 reviews $45.76

Colony #2651-10 Front Brake Shackle Rebuilding Kit 1939 Harley-Davidson Big Twin/45's
$90.88

Drag Specialties 6-1/2 inch Forged Aluminum Handlebar Risers - Black
1 review $135.63

Drag Specialties Clutch Cable OEM #38618-68C Harley-Davidson 4 Speed Big Twin 1968-1986 - 60" Long
$67.79

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

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

Cycle Standard Reproduction Long Skirted Eaton Style Bayonet / Cam Style Vented Gas Cap - Chrome
23 reviews $38.04

Cycle Standard Deluxe Black Harley-Davidson Brake Light Switch - Knucklehead, Panhead, Flathead (1937-1957) OEM #72004-39
18 reviews $33.24

Cycle Standard Clutch Hub Retainer With Rollers 1941-1984 Harley-Davidson Big Twins - OEM #37567-41A
1 review $29.41

Cycle Standard Chrome Fork Neck Cup Kit for 1949-1987 Harley-Davidson Big Twins
$52.50

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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