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 #8153-2 Generator Mounting Screws 1958-1969 Harley-Davidson Big Twins - Chrome Plated
2 reviews $12.74

Colony #8012-2 Intake Manifold Nuts 1930-1948 Harley-Davidson 74 & 80 c.i. Flathead 1936-1939 61 c.i. OHV & 1940-1946 WLD - Chrome Plated
$38.03

Colony #9868-26 Inner Primary Mounting Kit 1970-1979 Harley-Davidson FL/FX
$38.00

Colony #2155-4 Rear Axle Nut and Spacer Kit Grooved Harley-Davidson VRSC 2002-04 - Chrome Plated
$37.90

Colony #2153-3 Front Axle Nut and Spacer Kit Grooved 2002-2003 Harley-Davidson VRSC - Chrome Plated
$37.90

Colony #2385-1 Oversized 9/16-18 Thread Tap for Stripped Drain Hole 1965-Up Harley-Davidson Big Twin 1967-Up Sportster
3 reviews $37.66

Colony #9856-15 Custom Sprocket Bolt & Washer Kit 1973-Up Harley-Davidson FL/FX/XL W/Spoke Rear Wheel - Chrome Plated
$37.66

Colony #9860-20 Lower Motor Mount Kit 1988-2006 Harley-Davidson FLT/FLHT/FXR/FXRS
$36.94

Cycle Standard Rubber Battery Strap 1991-17 Harley-Davidson FXST FLST 80-92 FLT 78 XLCR 79 XL
2 reviews $6.14

Colony #8866-8 Sprocket Cover / Master Cylinder Mounting Kit Acorn Head 1986-Up Harley-Davidson - Chrome Plated
2 reviews $18.34

Colony #9532-13 Rear Crash Bar Mounting Kit 1936-1957 Harley-Davidson Big Twin - Parkerized
1 review $36.54

Colony #3083-6 Handlebar Grip Retainer Kit Harley-Davidson 1949-1953 Big Twins/45/K models - CAD Plated
$36.30

Colony #3296-16 Spotlight Mounting Kit 1949-1978 Harley-Davidson Big Twins - Chrome Plated
$18.15

Colony #2827-3 Schebler and Linkert Carburetor Float Lever Screw Kit 1916-1965 Harley-Davidson - CAD Plated
$12.10

Colony #2126-12 Generator Brush Positive Terminal Screws/Fittings 1932-1957 Harley-Davidson All Models
$18.15

Colony #8214-7 Generator Mounting Hardware Kit 1930-1957 Harley-Davidson Twins - CAD Plated
1 review $18.15

Colony #3685-12 Lower Motor Mount Kit 1966-1969 Harley-Davidson OHV Big Twins - Chrome Plated
$36.03

Colony #3468-7 Steering Damper Upper Kit 1930-1936 Harley-Davidson VL
$36.00

Colony #9954-5 Point Cover Mounting Button Torx Kit 1999-Up Harley-Davidson Twin Cam Dyna/FLT 2000-Up Softail - Chrome Plated
2 reviews $7.17

Colony #9420-21 Transmission Mounting Kit Late 1977-1986 Harley-Davidson Big Twin - Chrome Plated
3 reviews $35.84

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

Colony #8769-3 Front Axle Nut & Washer Kit 1972-Up Harley-Davidson Wideglide - Chrome Plated
1 review $11.56

Colony #8768-3 Front Axle Nut & Washer Kit 1973-1991 Harley-Davidson FX/XL - Chrome Plated
$11.56

The Rough Trade Original Tool Kit Reproduction Wrench Set for Harley-Davidson Panheads
$11.54

Colony #3193-2 Primary Drain Plug 2004-2006 Harley-Davidson Softail - Zinc Plated
10 reviews $11.50

Colony #8851-4 Footpeg Mounting Shoulder Bolt & Nut Kit 1969-Up Harley-Davidson FX/FL/XL OEM #4721 - Chrome Plated
$17.22

Colony #8792-5 Disc Brake Rotor to Hub Flat Allen Screw 1980-1981 Harley-Davidson FLT OEM #1643 - Chrome Plated
1 review $17.14

Colony #8484-1 Stem Nut Reproduction 1936-1948 Harley-Davidson Big Twin Springers - Chrome Plated
1 review $17.14

Lowbrow Customs Pursuit Shifter Peg for Harleys - Raw Aluminum
28 reviews $34.13

Colony #3028-4 Upper Inner Pushrod Covers 1957-1985 Harley-Davidson Sportster 1936-1983 OHV Big Twin - Parkerized
3 reviews $34.05

Colony #8204-4 Hydraulic Lifter Converters Eliminate Hydraulic Units 1953-Up Harley-Davidson Big Twins
$34.05

Colony #2922-5 Air Cleaner Over Length Mounting Screw and Lock Kit 1936-1955 Harley-Davidson All Twins - CAD Plated
$16.94

Colony #9419-19 Transmission Mounting Kit 1965-Early 1977 Harley-Davidson Big Twin - Zinc Plated
4 reviews $33.67

Colony #9200-33 Windshield Mounting Kit 1949-Up Harley-Davidson FL/FX/XL/K - Chrome Plated
2 reviews $33.67

Colony #8606-6 Rear Axle Cap Kit 1973-Up Harley-Davidson Big Twin 1979-Up Sportster XL - Chrome Plated
1 review $33.67

Cycle Standard S&S Super E/G Carburetor Adapter for CV Air Cleaners - Black
$33.53

Colony #9676-5 Seat Bar Bushing Set 1937-1964 Harley-Davidson Big Twin 1929-1952 45 Solo - Parkerized
2 reviews $33.31

Cycle Standard Headlight Visor - 7" Headlight - Black - Replaces OEM #69733-05
$33.24 $44.32

Colony #2847-3 Wheel Bearing Locknut Seal Kit 1967-1972 Harley-Davidson FL/FLH 1971-1972 FX 1967-1972 Servi-car - CAD Plated
1 review $33.00

Colony #9402-1 Timing Plug 1970-Up Harley-Davidson OEM #720 - Chrome Plated
$11.00

Colony #8879-30 Rear Fender Support Mounting Kit 1958-1980 Harley-Davidson FL/FLH - Chrome Plated
4 reviews $33.00

Colony #3464-1 Choke Lever 1938-1965 Harley-Davidson Big Twins - Parkerized
$32.99

Colony #3352-1 Clutch Release Lever Stud 1938-1984 Harley-Davidson Big Twins
1 review $32.99

Colony #3165-4 Muffler Mount Spacers 1979 - 1984 Harley-Davidson FL FLH OEM 57089-71 — Colony #3165-4 Muffler Mount Spacers 1979-1984 Harley-Davidson FL/FLH - Zinc Plated
1 review $10.89

Colony #2973-4 Spacers Harley-Davidson OEM #58102-49 - 4 Pack - CAD Plated
4 reviews $10.89

Colony #8600-8 Hi-Torque Cylinder Base Nut Set Harley-Davidson Big Twin Pre-Evo - Chrome Plated
2 reviews $32.60

Colony #8831-10 Disc Brake Rotor to Hub Screw & Nut Kit 1978-1983 Harley-Davidson FXWG - Chrome Plated
1 review $16.01

Colony #3794-2 Tail Lamp Speed Nut & Screw Kit 1955-1972 Harley-Davidson FL/FLH/FX/XL
$15.95

Colony #8801-2 Transmission Fill Plug 1940-1984 Harley-Davidson Big Twin 4 Speed - Chrome Plated
1 review $15.94

Colony #9824-3 Custom Front Axle Nut & Spacer Kit 1988-1996 Harley-Davidson FXSTS - Chrome Plated
$31.87

Colony #9812-3 Smooth Rear Axle Spacer Kit 1991-1999 Harley-Davidson Dyna Glide - Chrome Plated
$31.87

Colony #9975-4 Front Axle Nut Smooth Spacer Kit 1995-1999 Harley-Davidson XL/Dyna - Chrome Plated
$31.87

Colony #8857-8 Cylinder Base Stud Set 1978-1984 Harley-Davidson Big Twins OEM #16837-78
1 review $31.87

Colony #8856-8 Cylinder Base Stud Set 1930-1977 Harley-Davidson Big Twins OEM #16831-30
4 reviews $31.87

Colony #7603-4 Lower Motor Mount Kit Acorn Nut 1936-1984 Harley-Davidson OHV Big Twins - Chrome Plated
6 reviews $31.87

Colony #9932-8 Intake Manifold to Cylinder Head Allen Kit 1995-Up Harley-Davidson Big Twins/XL
2 reviews $6.33

Colony #3777-1 Fuel Strainer Flexible Hose Nipple 1950-1965 Harley-Davidson Twins
1 review $7.87

Colony #8821-18-OS Oversize Top of Tank Screw & Washer Kit 1918-1936 All Harley-Davidson 1936-1952 45s - Nickel Plated
$31.14

Colony #8160-4 Rear Axle Nut and Lock Kit - 1930-1972 Harley-Davidson Knucklehead/Panhead/Shovelhead - Chrome Plated
$31.14

Colony #8916-17-P Primary Cover Smooth Allen Screw Kit 1985-Up Harley-Davidson FXR 1985-1999 FLT 5 speed - Chrome Plated
2 reviews $31.13

Colony #2141-2 Swingarm Covers 1986-1999 Harley-Davidson Softail - Plated
4 reviews $31.13

Colony #3050-2 Stem Nut Lockwasher Kit 1960-Up Harley-Davidson FL/FLH W/O Steering Damper
$15.52

Colony #2600-2 Brake Caliper Bleed Screws 1983-2004 Harley-Davidson Big Twin 1983-2003 XL - Chrome Plated
4 reviews $10.29

Colony #3683-16 Lower Motor Mount Kit 1958-1965 Harley-Davidson OHV Big Twins - CAD Plated
$30.80

Colony #3578-28 Footboard Pad Rivets 1941-1965 Harley-Davidson All Models
$15.40

Colony #2920-2 Nut & Lock Kit 1936-Up Harley-Davidson Big Twin Kickstarter 1936-1979 Bg Twin 4 Speed Countershaft
5 reviews $7.70

Colony #7101-1 Motor Sprocket Nut 11/16-18 Thread - 1930-1954 Harley-Davidson Big Twins
$15.40

Colony #2277-10 12 Point Sprocket Bolt and Washer Kit 1979-1990 Harley-Davidson XL 1973-1992 Big Twin - Chrome Plated
1 review $30.79

Drag Specialties Organic Rear Brake Pads L1987-99 H-D XL 91-98 Dyna Glide 84-97 FXR 84-E87 FXST/FLST
$30.58

Cycle Standard 5 Hole Chrome Derby Cover for Harley-Davidson Big Twins
$30.58

Cycle Standard Kickstand Bumper Rubber - 1999-2006 Harley-Davidson Touring Models OEM #50245-99A
6 reviews $7.58

Colony #2783-5 Starter Pedal Axle Kit 1916-1962 Harley-Davidson - Parkerized
$30.25

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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