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 #2711-2 Brake Shaft Cross Over Bushing Kit 1937-1957 Harley-Davidson Big Twins
4 reviews $18.15

Samwel Supplies Reproduction Bearing Adjuster Nuts for Springer Forks - Parkerized
8 reviews $54.19

Colony #2082-5 Front Brake Shoe Pivot Stud Kit 1949-1971 Harley-Davidson FLH 1958-1972 Servi-car - CAD Plated
1 review $27.07

Cycle Standard Mini 1:1 ratio Mechanical Speedometer - 2.4 inch
4 reviews $53.99

Colony #7607-7 Front Rocker Stud Assembly 1930-1948 Harley-Davidson Big Twin Springers
$53.96

Colony #3639-2 Intake Manifold Rubber Seals 1978-1984 Harley-Davidson Shovelhead & Sportster
$7.70

Cycle Standard Replacement Dished Sprocket - Black - 51 Tooth - 1973-1985 Harley-Davidson Big Twin 1979-81 XL OEM# 41470-73
$66.56

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

Cycle Standard Heel-Toe Shift Lever - 1965-1984 Harley-Davidson FL/FLH (With Splines) - Chrome - OEM# 34692-74TA
$52.84

Colony #9618-18 Jiffy Stand & Foot Clutch Lever Bracket Mounting Kit 1936-1978 Harley-Davidson Big Twin - CAD Plated
1 review $26.40

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

Cometic Gasket Inc. Cam Change Gasket Kit - 1993-99 Harley-Davidson Big Twin
$26.20

Cometic Gasket Inc. Cam Change Gasket Kit - 1970-92 Harley-Davidson Big Twin
$26.20

Colony #3038-18 Gas Tank Mounting Kit 1937-1975 Harley-Davidson Big Twins 1971-1972 FX - Parkerized
1 review $17.42

Colony #9893-18 Gas Tank Mounting Kit 1937-1975 Harley-Davidson Big Twin 1972-1972 FX - Parkerized
3 reviews $17.42

Colony #3045-14 Inner Primary Chain Guard Kit 1936-1954 Harley-Davidson Big Twins - Parkerized
1 review $26.08

Colony #9866-18 Transmission Mounting Kit 1986-Up Harley-Davidson FXST - Chrome Plated
$26.07

Colony #3744-1 Stem Crown Nut Kit 1936-1948 Harley-Davidson Big Twin Springer
$51.70

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

Colony #3014-34 Stock Fastener Motor Case Kit 1948-1964 Harley-Davidson Panhead - Parkerized
2 reviews $51.70

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

Drag Specialties Oil Filter for 1980-1985 Harley-Davidson Sportster and Big Twin Models - Black - OEM# 63782-80
1 review $10.25

#3107-16 Front Shock Absorber Upper Mount Kit Harley Springer 1946-57 — Colony #3107-16 Front Shock Absorber Upper Mount Kit 1946-1957 Harley-Davidson Springers - Parkerized
$51.15

Colony #9864-6 Grease Fitting Zerk Type 1936-1984 Harley-Davidson - CAD Plated
3 reviews $12.74

Colony #2867-1 Rear Axle Spacer 1936-1957 Harley-Davidson Big Twins - Chrome Plated
$25.30

Colony #8602-20 Oversize Stroker Upper Pushrod Cover Kit 1940-1947 Harley-Davidson Knucklehead & All Shovelhead - Chrome Plated
1 review $50.08

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

Colony #8156-30 Primary Cover Screw Kit 1936-1964 Harley-Davidson Big Twins - CAD Plated
$25.00

Colony #8860-8 Cylinder Base Stud Spacer 1978-1984 Harley-Davidson Shovelhead OEM# 16836-78 - Chrome Plated
1 review $24.98

Clymer Manuals 1948-1965 Harley Davidson Panhead Manual
$49.95

Cycle Standard Handlebar Clamp - Smooth - Chrome
$22.25

Gasbox Peg Mount License Plate Bracket - 1984-2017 Harley-Davidson Softail - Vertical or Horizontal
7 reviews $49.95

Drag Specialties 50A Circuit Breaker 1970-1999 Harley-Davidson Big Twin/XL 1999 Twin Cam
$12.43

Colony #2714-36 Instrument Panel Base Restoration Kit 1939-1946 Harley-Davidson Big Twins
1 review $49.50

Cycle Standard 41mm Fork Seal Rebuild Kit - 1949-1977 Harley-Davidson FL
$17.66

Colony #9695-26 Transmission Mounting Kit 1936-1964 Harley-Davidson Big Twin - Parkerized
2 reviews $49.41

Colony #8232-26 Transmission Mounting Kit 1936-1964 Harley-Davidson Big Twin - CAD Plated
1 review $49.41

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

Colony #8738-10 Disc Brake Rotor Bolt & Nut Kit Harley-Davidson FL/FX/XL - Chrome Plated
1 review $16.38

Colony #9622-16 Lifter Base Screw Kit 1936-1953 Harley-Davidson Big Twin 1937-1973 45's - Parkerized
2 reviews $16.35

Colony #3533-3 Front Brake Cable Clip 1950-1971 Harley-Davidson FL/FLH - CAD Plated
2 reviews $16.34

James Gaskets Exhaust Gasket/Mounting Kit for Harley-Davidson 1984-2013 Big Twins and 1986-2013 XL
15 reviews $24.43

Colony #2085-2 Seat Post Bushing Installation Tool 1958-1984 Harley-Davidson Big Twins - Parkerized
$48.73

Colony #7350-15 Acorn Primary Cover Screw Kit 1971-Up & All 4 Speed Harley-Davidson Big Twins - Chrome Plated
$48.73

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

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

Cycle Craft #175 Main Jet - 1988-2006 Keihin CV Carburetor
$5.99

Colony #9009-5 Linkert Carb Support Bracket 1941-1953 Harley-Davidson OHV OEM# 27431-41 - Parkerized
$15.95

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

Colony #9521-22 Upper & Lower Motor Mount Kit 1937-1947 Harley-Davidson Big Twin Side Valve - Chrome Plated
$47.80

Colony #2205-4 Swing Arm Pivot Hex Bolts 1984-1999 Harley-Davidson Softail - Chrome Plated
$47.38

#3099-2 Starter Clutch to Mainshaft Nut Lockwasher Kit Harley 1941-67 FL FLH — Colony #3099-2 Starter Clutch to Mainshaft Nut Lockwasher Kit 1941-1967 Harley-Davidson FL/FLH
2 reviews $7.87

Colony #3664-10 Disc Rotor Allen Screw & Nut Kit 1979-1991 Harley-Davidson XL/FX (Spoked Wheel) - Zinc Plated
$15.73

Colony #3037-8 Oil Tank Mounting Kit 1936-1957 Harley-Davidson Big Twins - Parkerized
$15.73

Drag Specialties Starter Brake Light and Fuel Pump Relay 1991-2007 Harley-Davidson Big Twin Models (w/diode)
$15.55

Colony #7500-2 Oversize Timing Plug/Oil Tank Plug & Tap Kit 11/16-16 Thread - Chrome Plated
$46.35

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

Lowbrow Customs Banded Screw-In Gas Cap for Harley-Davidson 1996 & later - Aluminum
10 reviews $46.24

Cycle Standard Clutch Cable OEM 38602-92 Harley Dyna 1992-2005 - Blacked Out
$46.07 $56.33

Cycle Standard Shift Lever - 1985-2006 Harley-Davidson Big Twin/Twin Cam - Chrome - OEM# 33715-85A
1 review $23.03

Colony #7410-1 Sprocket Shaft Bearing Retainer with Lip Seal Standard Size Replaces 1955-1968 Harley-Davidson 74's
4 reviews $45.98

Cycle Standard Steel Clutch Plate Set 1991-Up Harley-Davidson Sportster 90-97 Big Twin
$25.53

Colony #2501-12 Rear Brake Rod Mounting Kit 1930-1969 Harley-Davidson Big Twin - Parkerized
1 review $15.31

Colony #2430-2 Transmission Mainshaft Bearing Nut and Lock Tab 1936-1985 Harley-Davidson Big Twin - Parkerized
1 review $15.31

Cycle Standard Headlight Visor - 5-3/4" Headlight - Chrome - Replaces OEM# 69738-05
$45.32

Cycle Standard Stock Style Chrome Kicker Lever - 1936 - 1977 Harley Big Twin and 1957 - 1976 XL
5 reviews $45.07

Gasbox Front Pipe to Frame Clamp Set for 1958 - 1969 Harley-Davidson FL Models - Parkerized - OEM # 65513-58, 65512-37A
3 reviews $22.50

Colony #9928-20 Motor Mounting Allen Kit 1988-2006 Harley-Davidson FLT/FLHT/FXR/FXRS - Chrome Plated
1 review $44.89

Cycle Standard Neck Post Bearing & Race Set Made in China
$15.99

Colony #8762-17 Primary Cover Allen Head Screw Kit 1971-Up Harley-Davidson Shovelhead/Evo 4 Speed - Chrome Plated
2 reviews $22.34

Colony #2138-4 Handlebar Riser Hex Bolt Kit 1/2-13 x 3-1/2" - Chrome Plated
1 review $14.89

Colony #2137-4 Handlebar Riser Hex Bolt Kit 1/2-13 x 3" - Chrome Plated
4 reviews $14.89

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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