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 #9904-17 Inner Primary Mounting Kit 1986-2000 Harley-Davidson FLT/FXR
2 reviews $24.00

Cycle Craft #190 Main Jet - 1988-2006 Keihin CV Carburetor
1 review $5.99

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

Colony #9960-1 Oversize Plated Allen Timing Plug 11/16"-16 Threads Harley-Davidson OEM #720 - Chrome Plated
3 reviews $9.56

Cycle Standard Cycle Standard 24"" Handlebar Wiring Extension Kit for 1996-2006 Harley Models
10 reviews $46.94

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

Lowbrow Customs Black Solo Seat Bolt-On Spring Mounts for Harley-Davidson Swingarm Frames 1958 - 1985
5 reviews $45.76

Colony #9978-2 Custom Fork Stem Bolt 1986-Up Harley-Davidson XL/FXR/FXD/FLST - Chrome Plated
3 reviews $22.80

Martian Machine Heart Cast Aluminum Points Cover - Horizontal
$45.00

Cycle Standard 41mm Fork Seal Rebuild Kit - 1977-1984 Harley-Davidson FL 1980-83 FXWG FLT
$15.00

Cycle Standard Replacement 41MM Fork Springs 1986-1999 Harley-Davidson FLST OEM# 45931-86
$44.99

Cycle Standard Oil Filter for Harley-Davidson XL FXR Softail Touring Models and Buell - Chrome - OEM #63805-80A 63796-77A
8 reviews $14.98

Colony #3796-2 Over Length Manifold Nipple for 61" Narrow Manifiolds On 1940-1954 Harley-Davidson OHV 74"
$22.45

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

Colony #9859-20 Lower Motor Mount Kit 1988-2006 Harley-Davidson FLT/FLHT/FXR/FXRS - Chrome Plated
1 review $44.89

Colony #8840-10 Rear Stand Mounting Kit 1930-1936 Harley-Davidson Side Valve Big Twins 1926-1929 Singles 1926-1935 45's - Parkerized
1 review $22.44

Cycle Standard Oil Filter for Harley-Davidson Dyna Softail and Touring Models - Black - OEM #63798-99A 63731-99
6 reviews $14.91

Colony #8726-8-P Lifter Base Smooth Allen Screw Kit 1976-Up Harley-Davidson Big Twin - Chrome Plated
$14.89

Colony #2131-4 Handlebar Riser Allen Bolt Kit 1/2-13 x 3-3/4" - Chrome Plated
$14.89

The Rough Trade 2-1/8" Wrench for Harley-Davidson Large Port Knucklehead & Panhead Intake
$22.31

Colony #2562-2 Panel Switch Knob and Screw Kit 1939-E1943 Harley-Davidson Big Twins & 45s - Chrome Plated
$14.85

Colony #2560-2 Panel Switch Knob And Screw Kit 1939-1943 Harley-Davidson Big Twin/45s - Chrome Plated
$14.85

Colony #2567-2 Transmission Drain Plug 1981-1992 Harley-Davidson FLT/FXR - Zinc Plated
1 review $11.13

Colony #3346-1 Horn Power Pack Rubber Mount 1954-1964 Harley-Davidson FL/FLH/XL/XLH
$22.00

Colony #3178-2 Piston Lock Ring Tool 1932-1973 Harley-Davidson Big Twins - Parkerized
2 reviews $44.00

#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 $11.00

Colony #2985-2 Damper Tube Mounting Bolts & Copper Washers 1979-Up Harley Sportster 1975-Up FL/FX with 39mm Narrow Glide Forks
6 reviews $11.00

Colony #7825-20 Grade 8 Head Bolt Kit 1948-Up Harley-Davidson Panhead/Shovelhead - CAD Plated
$43.99

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

Colony #9976-2 Stem Bolt Washer Kit 1986-Up Harley-Davidson FLST/FXR/FXD/XL - Zinc Plated
1 review $8.78

Colony #7158-2 Linkert Carburetor Fitting For 1/4 inch ID Hose
2 reviews $8.78

Colony #3036-22 Upper and Lower Motor Mount Kit 1937-1947 Harley-Davidson Big Twin Side Valve - Parkerized
1 review $43.82

Colony #3000-2 Springer Spring Rod Bushings 1931-1945 Harley-Davidson Big Twin Springers - Parkerized
1 review $43.82

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

Colony #3118-3 Sprocket Nut Lockplate Harley 93-06 Softail Touring 93-05 Dyna — Colony #3118-3 Sprocket Nut Lockplate 1993-2006 Harley-Davidson Softail/Touring 1993-2005 Dyna
$14.51

Colony #9634-4 Oil Pump Check & Relief Valve Plugs 1981-Up Harley-Davidson FL/FX - Chrome Plated
1 review $21.73

Colony #9993-5 Front Axle Nut Smooth Spacer Kit 1997-1999 Harley-Davidson FXST/FXSTC/FXSTB/FXDWG - Chrome Plated
2 reviews $43.45

Colony #9897-6 Grease Fitting Zerk Type 1936-1984 Harley-Davidson - Chrome Plated
2 reviews $14.34

Colony #3754-1 Circuit Breaker Base Retainer 1936-1964 Harley-Davidson All Models
$21.45

Colony #8006-2 Brass Intake Manifold Seals 1936-1939 Harley-Davidson Knucklehead All 1930-1948 Sidevalve (Except 45's)
$21.45

Cycle Craft #170 Main Jet - 1988-2006 Keihin CV Carburetor
1 review $5.99

Drag Specialties Semi Metallic Rear Brake Pads 1982-E87 H-D XL 84-E87 FXR 84-E87 FXST/FLST 85-86 FXWG 85 FXE/FXEF 82-83 FXR/FXRS/FXRT 83-84 FXWG 84 FXE/FXEF
$20.95

Colony #3047-3 Oil Line Vent Line Fittings Pre-1965 Harley-Davidson Twins - Parkerized
$13.94

#3088-1 Foot Shifter Lever Bushing Harley Big Twins 1970-84 — Colony #3088-1 Foot Shifter Lever Bushing 1970-1984 Harley-Davidson Big Twins
1 review $20.90

V-Twin Manufacturing Polished Shifter Rod 1991-2005 Harley-Davidson FXD
$29.20 $41.71

Colony #9680-6 Front Fender Mounting Kit 1936-1948 Harley-Davidson Springers - Parkerized
$20.85

Lowbrow Customs Spare Parts Book for 1949-1957 Harley-Davidson Panhead
15 reviews $41.61

Colony #8151-2 Generator Screw Kit 1936-1957 Harley-Davidson Big Twin - Chrome Plated
1 review $10.37

Colony #2980-11 Fender to Brace Rivets and Tool 1930-1979 Harley-Davidson All Models
2 reviews $20.57

Colony #2070-1 Oil Line Fitting Chrome 1/8 NPT Thread for 3/8 inch Hose OEM #63533-41 - Chrome Plated
6 reviews $4.54

Colony #2810-13 Instrument Panel Light Switch Kit 1937-1938 Harley-Davidson Big Twins - CAD Plated
$40.70

Colony #2304-2 Handlebar Plunger 1949-1953 Harley-Davidson Big Twins/45's/Hummer Models
1 review $20.31

Cycle Standard Clutch Release Arm 1971-1978 Harley-Davidson FX 1968-1978 FL
$40.41

Colony #2142-12 Pushrod Cover Seal Kit 1979-1984 Harley-Davidson Shovelhead
4 reviews $13.40

Lowbrow Customs Harley-Davidson Shovelhead Tune & Service Video Workshop Manual DVD with Frank Kaisler
42 reviews $5.71 $11.21

Colony #2762-3 Starter Crank Bushings and Seal Kit 1937-1967 Harley-Davidson Big Twins
$13.31

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

Cycle Standard Throttle Cable OEM #56356-96A Harley Dyna 1996-2008 +4 inch Extended
$39.63

Colony #3374-4 Triple Clamp Bolt Kit 1932-1936 Harley-Davidson 45"/74"/80" Twins 1932-1934 C Singles - Parkerized
$39.60

Colony #3576-1 Gas Tank Rubber Divider 1936-1938 Harley-Davidson Big Twins
$19.80

Colony #2086-1 Seat Post Bushing Installation Tool 1936-1957 Harley-Davidson Big Twins - Parkerized
4 reviews $19.80

Colony #9012-5 Linkert Carb Support Bracket 1939-1948 Harley-Davidson OEM #1110-39 - Parkerized
$13.20

Colony #8004-4 Intake Manifold Conversion Nipple Kit/Panhead O-ring Style Manifold 1936-1939 Harley-Davidson OHV Small Port Heads
$39.47

James Gaskets Exhaust Port Gaskets - STD Heads for Harley-Davidson Shovelheads
$13.13

Colony #9858-15 Custom Sprocket Bolt & Nut Kit 1985-Up Harley-Davidson FXWG/FXRS W/Spoke Rear Wheel - Chrome Plated
$39.11

Colony #9711-5 Shifter Lever Stud & Bushing 1936-1954 Harley-Davidson - Parkerized
3 reviews $19.51

Colony #3328-4 Exhaust Port Nuts Harley-Davidson 1986-Up XL 1984-1999 Big Twins 1999-Up Twin Cam - Zinc Plated
14 reviews $4.84

Colony #2900-1 Motor Sprocket Nut 1991-2006 Harley-Davidson Big Twins
2 reviews $19.36

Colony #2181-6 Handlebar Grip Retainer Kit 1949-1953 Harley-Davidson Big Twins/45's/K Model - Chrome Plated
1 review $38.50

Colony #2015-6 Oversize Valve Cover Screws 1948-1965 Harley-Davidson Panhead W/Steel D Rings - CAD Plated
1 review $19.12

Colony #9523-1 Oil Pump Check Valve Plug 1936-1980 Harley-Davidson Big Twin 1937-Up UL/45s - Chrome Plated
2 reviews $12.74

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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