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 #3671-1 Starter Solenoid Plunger Cover 1965-1988 Harley-Davidson Big Twins 1967-1980 XL
$9.68

Colony #3146-1 Breaker Point Eccentric Screw 1947-70 Harley Davidson — Colony #3146-1 Breaker Point Eccentric Screw Harley-Davidson OEM #30507-47A
$9.68

Colony #2728-1 Chain Housing Top or Shifter Lever Pivot Screw 1965-1984 Harley-Davidson FL 1971-1984 FX - Chrome Plated
$9.68

Colony #2657-3 Clutch Hub Bearing Plate Springs 1944-1984 Harley-Davidson Big Twins 1944-1973 45's - CAD Plated
$4.84

Colony #9910-4 Fork Slider Drain Screws 1973-Up Harley-Davidson XL/FXR - Chrome Plated
5 reviews $4.84

Colony #9664-8 Linkert Carb Mounting Screws Harley-Davidson OEM #27424-48 - Parkerized
4 reviews $9.56

Colony #9527-1 Oil Pump Bypass Valve Plug 1936-1952 Harley-Davidson Big Twin 1937-Up UL/45s - CAD Plated
$9.56

Colony #9524-1 Oil Pump Check Valve Plug 1936-1980 Harley-Davidson Big Twin 1937-Up UL/45s - CAD Plated
$9.56

Colony #8200-10 Star Shaped Wheel Hub Outer Cover Screw Kit 1936-1966 Harley-Davidson - Chrome Plated
2 reviews $9.56

Colony #9916-2 Custom Air Cleaner Cover Countersunk Mounting Kit 1983-Up Harley-Davidson Big Twins - Chrome Plated
$4.76

Colony #8796-4 Handlebar Clamp Allen Screw Kit 1982-Up Harley-Davidson FX/XL - Chrome Plated
8 reviews $9.31

Colony #8775-4 Dash Mounting Kit Button Allen 1977-1985 Harley-Davidson FX - Chrome Plated
$9.16

Colony #9915-4 Seat Bracket Button Head Mounting Kit 1987-Up Harley-Davidson Softail/Fat Boy - Chrome Plated
$8.93

Colony #9503-1 Timing & Oil Tank Plug 1938-1951 Harley-Davidson All Models OEM# 2326-38 - CAD Plated
$8.80

Colony #3180-18 Mud Flap Mounting Kit 1932-49 Harley Davidson Big Twins — Colony #3180-18 Mud Flap Mounting Kit 1932-1949 Harley-Davidson Big Twins - Parkerized
$8.80

Colony #2286-1 Sprocket Shaft and Pinion Gear Shaft Nut 1936-E1981 Harley-Davidson Big Twins - Parkerized
$8.80

Colony #9504-1 Timing & Oil Tank Plug 1938-1951 Harley-Davidson All Models OEM #2326-38 - Parkerized
1 review $8.80

Colony #8441-1 Timing/Oil Plug All Harley-Davidson Timing Plug and 74s Oil Tanks - Chrome Plated
$8.78

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

Colony #9529-12 Pushrod Cover O-Ring Seal Kit Harley-Davidson Big Twin Evo/Twin Cam/Sportster
3 reviews $8.78

Colony #9304-1 Oversize Harley-Davidson Timing & Oil Tank Plug - Chrome Plated
1 review $8.78

Colony #8483-2 Dash Center Screw Kit 1947-1967 Harley-Davidson - Chrome Plated
1 review $8.78

Colony #8114-1 Timing Plug/Oil Tank Plug OEM #704 1952-1969 Harley-Davidson FL and XL -Chrome Plated
1 review $8.78

Colony #2098-2 Generator Phillips Screw Kit 1950-1954 Harley-Davidson Big Twin - CAD Plated
$8.47

Colony #3501-1 Oil Tank Adapter Fitting For Filter 1950-1964 Harley-Davidson Big Twins - CAD Plated
$8.47

Colony #2623-1 Oil Pressure Switch Nipple 1939-1969 Harley-Davidson Big Twins - CAD Plated
$8.47

Colony #9933-12 Intake Manifold to Cylinder Head Allen Kit 1986-1987 Harley-Davidson XL
$8.36

Drag Specialties 40A Circuit Breaker 1970-1999 Harley-Davidson Big Twin/XL 1999 Twin Cam
$8.27

Colony #2733-2 Fork Slider Drain Screws 1949-1977 Harley-Davidson FL - CAD Plated
$3.99

Colony #9782-4 Triple Tree Pinch Allen Bolt All Harley-Davidson FL and Wideglide - Chrome Plated
$7.96

Colony #3448-5 Disc Brake Rotor To Hub Allen Screw Kit 1974-1977 Harley-Davidson FX/XL - Zinc Plated
$7.87

Colony #3473-1 Oil Tank Drain Plug 1981-1992 Harley-Davidson FLT 1982-1985 FXR - Zinc Plated
$7.87

Colony #3778-1 Clutch Dissasembly Washer Harley-Davidson Knuckleheads/Panheads/Shovelheads
1 review $7.70

Colony #3708-1 Instrument Panel Cover Plate Left Side 1939-1946 Harley-Davidson All Models - CAD Plated
$7.70

Colony #2587-1 Timer Cable Clamp 1936-1948 Harley-Davidson Big Twins - CAD Plated
$7.70

Colony #3343-2 Carburetor Bowl Drain Plug 1939-1965 Linkert
$7.57

Cycle Standard Brake Pedal Rubber 1971-1975 Harley-Davidson FX (except FXWG, FXST) OEM #42394-65
$7.30

Colony #3051-1 Oversized Drain Plug 1965-1984 Harley-Davidson FL 1971-1984 FX Chain Housing 1967-1992 XL Crankcase - Zinc Plated
$7.26

Colony #2412-6 Crank Pin Nut Lock Plates 1941-1953 Harley-Davidson Big Twins 1957-1980 XL
$7.26

Colony #2727-1 Chain Housing Top or Shifter Lever Pivot Screw 1965-1984 Harley-Davidson FL 1971-1984 FX - CAD Plated
1 review $7.26

Colony #9670-10 Star Wheel Hub Outer Screw Kit 1936-1966 Harley-Davidson - Parkerized
1 review $7.17

Colony #2496-2 Tappet Oil Screen and Spring 1966-1969 Harley-Davidson Shovelhead
1 review $6.96

Colony #2414-1 Clutch Pushrod Adjusting Screw Nut 1941-E1984 Harley-Davidson Big Twin 1941-1973 WL/WLA/WLC/ Servi-cars - Parkerized
$6.96

James Gaskets Generator Mounting Gasket 1940-1957 Harley-Davidson Big Twin
$1.14

Colony #9966-4 Footpeg Mounting Bolt/Nut Kit 1969-Up Harley-Davidson FX/FL/XL - Zinc Plated
$6.78

Colony #3646-5 Ignition Coil Mounting Plate Kit 1965-1984 Harley-Davidson FL/FX/XL - Zinc Plated
$6.60

Colony #3216-2 Clutch and Brake Lever Bushings 1941-1964 Harley-Davidson
$6.05

Colony #3335-4 Wheel Brake Cylinder Mounting Bolts 1958-1972 Harley-Davidson FL/FLH 1958-Up Sidecars - Parkerized
1 review $6.05

Cycle Craft #200 Main Jet - 1988-2006 Keihin CV Carburetor
$5.99

Colony #9931-8 Intake Manifold to Cylinder Head Allen Kit 1990-1994 Harley-Davidson Big Twin/XL
$5.96

Colony #8402-2 Point Cover Acorn Head Screws 1971-Up Harley-Davidson Shovelhead & Sportster - Chrome Plated
3 reviews $5.96

Colony #9948-8 Electrical Panel Cover Mounting Allen Kit 1991-Up Harley-Davidson Dyna - Chrome Plated
$5.95

Colony #3211-4 Chain Guard To Gear Box Screw Kit 1930 - 1935 Harley-Davidson VLs — Colony #3211-4 Chain Guard To Gear Box Screw Kit 1930-1935 Harley-Davidson VLs - Parkerized
1 review $5.81

Colony #9783-4-P Headlight Visor Mounting Bolt Kit Smooth Chrome Allen Harley XL FX FXR 1959-up — Colony #9783-4-P Headlight Visor Smooth Allen Mounting Kit 1959-Up Harley-Davidson XL/FX/FXR - Chrome Plated
$5.58

Colony #9784-4 Headlight Visor Mounting Hex Bolt Kit 1959-Up Harley-Davidson XL/FX/FXR - Chrome Plated
$5.58

Colony #9964-2 Fork Tube Bolt Washers 1978-Up Harley-Davidson FL/FXWG/Softail - Chrome Plated
2 reviews $5.18

Colony #8120-1 Starter Crank Pin Stud 1936-Up Harley-Davidson Big Twins - CAD Plated
$5.18

Colony #3761-5 Dash Cover Mounting Kit 1936-1946 Harley-Davidson Twins - CAD Plated
$4.95

Colony #9731-3 Gas Strainer Rebuild Kit 1939-1941 Harley-Davidson Twins
$4.76

Colony #3697-4 Exhaust Port Nuts 1984-1999 Harley-Davidson Big Twin 1986-Up XL 1999-Up Twin Cam - Zinc Plated
2 reviews $4.40

Colony #2629-4 Speedometer Mounting Kit 1936-Up Harley-Davidson Stewart-Warner Speedometers - CAD Plated
1 review $3.63

Colony #9963-1 Stem Nut Washer 1971-1985 Harley-Davidson FX 1979-1985 XL 79-85 - Chrome Plated
$2.78

Lowbrow Customs PVC Spacer Kit For Extended 39mm Fork Tubes
$12.96

Lowbrow Customs PVC Spacer Kit For Extended 41mm Fork Tubes
$12.96

Cycle Electric Alternator Kit CE-81AR 1989-1996 Harley-Davidson FLH/FLT/FXR
$575.74 $616.31

Cycle Electric Alternator Kit CE-81A-97R 1997-1998 Harley-Davidson FLH/FLT/FXR
$543.97 $582.29

Cycle Electric Alternator Kit CE-74TR 1999-2003 Harley-Davidson Dyna Models
$537.91 $575.81

Cycle Electric Alternator Kit CE-73TR 2001-2006 Harley-Davidson Softail Models
$531.12 $568.54

Cycle Electric Alternator Kit CE-71AR 1980-1988 Harley-Davidson FLH/FLT/FXR With 5 Speed Rubber Mount Motors
$571.48 $611.75

Cycle Electric Alternator Kit CE-61AR for 1980-1988 Harley-Davidson FLH/FLT/FXR With 5 Speed Rubber Mount Motors
$476.96 $510.57

Cycle Electric Alternator Kit CE-22ANBR for 1970-1998 Harley-Davidson Big Twins With No Battery
$388.34 $415.70

Fast Eddy Co. No. 67 Plumber Nut Intake Wrench for 1941-1954 Harley-Davidson FL Large Style Intakes
$89.95

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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