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 #8823-10 Coil Mounting Stud Kit 1948-1955 Harley-Davidson Big Twin 1948-1955 45s OEM #72341-48 - CAD Plated
3 reviews $13.40

Colony #9667-8 Oil Tank Mounting Kit - 1936-1957 Harley-Davidson Kuncklehead/Panhead - Parkerized
$13.40

Cycle Standard Oil Filter for Harley-Davidson Sportster and Big Twin Models - Black - OEM #63782-80
$13.29

Cycle Standard Headlight Visor - 7" Headlight - Black - Replaces OEM #69734-05
$26.55 $35.40

Colony #8408-1 Transmission Mainshaft Locknut & Washer 1936-1991 Harley-Davidson Big Twin 4 Speed
3 reviews $17.60

Colony #3122-4 Carburetor Bowl Locknut Brass1930-65 Harley Davidson Big Twins — Colony #3122-4 Carburetor Bowl Locknut 1930-1965 Harley-Davidson Big Twins - Brass
1 review $17.55

James Gaskets Exhaust Port Gaskets - STD Heads for Harley-Davidson Shovelheads
$13.11

#2373-1 Fork Tube Bolt OEM 45756-59 Harley Superglide 71-72 K XL 52-72 — Colony #2373-1 Fork Tube Cap/Bolt 1971-1972 Harley-Davidson Superglide 1952-1972 K/XL - Chrome Plated
1 review $26.07

Colony #8799-12 Primary Cover Screw Kit 1969-1969 Harley-Davidson Big Twin - Chrome Plated
$26.06

Lowbrow Customs Harley-Davidson Shovelhead Tune & Service Video Workshop Manual DVD with Frank Kaisler
42 reviews $5.19 $10.19

Cycle Standard Clutch Cable OEM #38618-52 1952-1967 Harley-Davidson FL/EL
1 review $25.86

Colony #3561-1 Stem Crown Nut 1939-1948 Harley-Davidson Big Twin Springer - Parkerized
$51.70

Colony #3010-34 Stock Fastener Motor Case Kit 1936-1939 Harley-Davidson Flathead - Parkerized
$51.70

Colony #7148-3 Oil Line/Vent Fitting - Pre-1965 Harley-Davidson Davidson Big Twin - Chrome Plated
1 review $17.22

Colony #7137-22 High Crown Acorn Rocker Box Bolt Kit - 1966-1984 Harley-Davidson Shovelhead - Chrome Plated
4 reviews $51.43

Colony #9923-5 Custom Front Axle Spacer Kit Smooth 1996-1999 Harley-Davidson FLSTF - Chrome Plated
$50.69

Cycle Standard Shift Lever - 1985-2006 Harley-Davidson Big Twin/Twin Cam - Chrome - OEM #33715-85A
1 review $25.33

Colony #2695-5 Linkert Low Speed Needle Valve 3-1/2 inch 1948-1965 Harley-Davidson Type 1 Heads
$25.30

Colony #2464-5 Brake Drum Wheel Mounting Bolt Set - 1936-1972 Harley-Davidson Knucklehead/Panhead/Shovelhead - Parkerized
4 reviews $25.30

#2399-2 Stem Nut Stock Zinc OEM 45718-71 Harley FX FXR 71-87 XL 78-87 — Colony #2399-2 Stem Nut Stock 1971-1987 Harley-Davidson FX/FXR 1978-1987 XL - Zinc Plated
5 reviews $16.70

Unity Manufacturing Clutch Lockup Tool - BDL Clutches
$50.00

Unity Manufacturing Four Speed Clutch Lockup Tool - Stock
3 reviews $50.00

Colony #9724-30 Primary Cover Screw Kit 1936-1964 Harley-Davidson Big Twin - Parkerized
2 reviews $25.00

Colony #9692-4 Rear Axle Nut and Lock Kit - 1930-1972 Harley-Davidsons Knucklehead/Panhead/Shovelhead - Parkerized
3 reviews $24.98

Clymer Manuals 1948-1965 Harley Davidson Panhead Manual
$49.95

Thrashin Supply Co. Shifter Peg - Black
$49.95

James Gaskets Primary Cover Gasket 1965-1988 Harley-Davidson Big Twin
$24.91

Colony #8113-20 Transmission Side & Clutch Arm Nut Kit Harley-Davidson Big Twin 4 Speeds To 1984 - CAD Plated
2 reviews $9.96

Colony #7112-19 Transmission Side Cover & Clutch Arm Acorn Nut Kit - 1936-1984 Harley-Davidson Big Twin 4 Speeds - Chrome Plated
3 reviews $24.71

Drag Specialties Wheel Bearings and Races - Replaces Harley-Davidson OEM #43577-67
$49.28

Colony #9928-20-P Motor Mounting Smooth Allen Kit 1988-2006 Harley-Davidson FLT/FLHT/FXR/FXRS - Chrome Plated
$49.25

Colony #9927-28 Upper & Lower Motor Mounting Allen Kit 1984-1999 Harley-Davidson Softail - Chrome Plated
$49.25

Colony #9854-28 Upper & Lower Motor Mount Kit 1984-1999 Harley-Davidson Softail - Chrome Plated
2 reviews $49.25

Colony #8739-10 Disc Brake Rotor Buttonhead Bolt & Nut Kit Harley-Davidson FL/FX/XL - Chrome Plated
2 reviews $16.38

Cycle Standard Throttle Idle Cable OEM #55355-92 Harley Dyna 1992-1995 - Blacked Out
$16.30 $23.28

Colony #2230-6 Intake Manifold Nipple Repair Kit 1948-1954 Harley-Davidson OHV - CAD Plated
2 reviews $24.37

Colony #8464-15 Primary Cover Cap Screw Kit 1971-Up Harley-Davidson 4 Speed Big Twins - Chrome Plated
$48.73

Cycle Standard 35mm Fork Seal Rebuild Kit - Showa Forks - 1984-87 Harley-Davidson XL FX FXR
6 reviews $16.23

Lowbrow Customs Banded Screw-In Gas Cap for Harley-Davidson 1996 & later - Aluminum
10 reviews $48.55

Colony #8798-12 Inner Primary Mounting Kit - 1965-1969 Harley-Davidson Shovelhead
$24.26

Colony #3366-4 Brass Exhaust Port Nuts Harley-Davidson 1986-Up XL 1984-1999 Big Twins 1999-Up Twin Cam
6 reviews $12.10

Colony #9217-4 Handlebar Bolt Kit Harley-Davidson 1936-1948 Big Twin Springers 1940-Up 45 Springers - Chrome Plated
$12.10

Colony #8149-12 Timing Cover Screw Kit 1936-1969 Harley-Davidson Big Twins - Chrome Plated
1 review $24.20

Colony #3785-1 Inner Primary Cover Reinforcement Ring 1936-1954 Harley-Davidson Knucklehead/Panhead
$24.00

Cycle Craft #44 Pilot Jet - 1988-2006 Keihin CV Carburetor
$5.99

Colony #9833-24 Rocker Cover Allen Screw Kit 1985-Up Harley-Davidson FL/FX 1986-Up XL - Chrome Plated
3 reviews $23.91

Colony #7803-11 Acorn Nut Kickstand Mounting Kit 1936-1986 Big Twin 4 Speeds (Except Softail) - Chrome Plated
5 reviews $23.91

Colony #2281-18 Spark Coil Mounting Kit 1937-1947 Harley-Davidson Big Twins - Parkerized
$47.38

Colony #3571-10 Disc Brake Rotor Allen Screw Set 1978-1982 Harley-Davidson FX/XL - Zinc Plated
2 reviews $15.43

Colony #2771-4 Kick Starter Pedal Mounting Kit 1917-Up Harley-Davidson Davidson - Chrome Plated
2 reviews $15.40

Colony #2105-8 Gas Tank Mounting Grommets/Spacers 1994-1999 Harley-Davidson Softail
3 reviews $15.40

Colony #8931-16-P Rocker Cover Smooth Allen Kit 1985-Up Harley-Davidson FL/FX 1986-Up XL - Chrome Plated
$23.01

Lowbrow Customs Lowbrow Customs Spark Plug Wire Set 2004-2006 Harley-Davidson XL 1999-2008 FLH/FLT
$22.99

Cycle Standard Throttle Cable OEM #56356-92 Harley Dyna 1992-1995 +4 inch Extended
$22.98

Colony #3451-4 Lower Shock Mounting Kit 1973-1984 Harley-Davidson FLH 1973-1986 FX - Zinc Plated
$9.08

Colony #8728-12 Rubberized Cork Pushrod Cover Seals Pre-1979 Harley-Davidson Panhead/Shovelhead
18 reviews $9.08

Cycle Standard Fork Neck Cup Dust Shield - Top - for Harley-Davidson Big Twins OEM #48361-80
11 reviews $9.02

Martian Machine Heart Cast Aluminum Points Cover - Horizontal
$45.00

Colony #7815-4 Acorn Head License Plate Mounting Kit And Rubber Washers - Chrome Plated
1 review $8.93

Colony #9808-6 Oil Nipple Cap 1915-1964 Harley-Davidson All Models - CAD Plated
1 review $14.85

Colony #3679-16 Lower Motor Mount Kit 1936-1957 Harley-Davidson OHV Big Twins - Chrome Plated
$44.28

Drag Specialties Bicycle-Style Kicker Pedal
$44.24

Colony #8112-20 Transmission Side & Clutch Arm Nut Kit Harley-Davidson Big Twin 4 Speeds To 1984 - Chrome Plated
3 reviews $14.74

Colony #9912-2 Fork Tube Cap 1978-Up Harley-Davidson FL/FXWG/Softail - Chrome Plated
$22.09

Colony #3364-1 Carburetor Choke Rod 1948-1965 Harley-Davidson OHV Big Twins - CAD Plated
1 review $21.99

Colony #2143-2 Springer Spring Rod Bushings 1949-1949 Harley-Davidson Big Twin 1946-1952 45s 1946-1957 Servi-car - Parkerized
$43.82

James Gaskets Replacement Float Bowl O-ring for 1988-1991 Harley-Davidson CV Carbs
$6.24

Drag Specialties 35mm Lower Fork Slider Bushing 1984-1987 Harley-Davidson FX/FXE/FXR 84-87 XL OEM# 45416-84
$14.51

Drag Specialties 35mm Upper Fork Slider Bushing 1984-1987 Harley-Davidson FX/FXE/FXR 84-87 XL OEM# 45413-84
$14.51

Colony #2000-6 Swing Arm End Plates/Wheel Adjuster 1991-2005 Harley-Davidson Dyna Glide - Chrome Plated
1 review $21.73

Colony #8820-9 Transmission Side Cover Allen Screw Kit 1936-Up Harley-Davidson Big Twin 4 Speeds - Chrome Plated
$21.60

Colony #2528-10-P Gas Tank Mounting Smooth Allen Kit 1990-1995 Harley-Davidson Softail - Chrome Plated
$21.51

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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