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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Lowbrow Customs Lowbrow Customs Spark Plug Wire Set 1986-2003 Harley-Davidson XL 1980-1989 FLH/FLT
$25.29

Lowbrow Customs Lowbrow Customs Spark Plug Wire Set 2007-2021 Harley-Davidson XL 1999-2006 FLH/FLT
$25.29

Lowbrow Customs Throttle Housing 1981-1995 Harley Thread-In Single Cable - Brass - 1 inch
5 reviews $134.96

Diamond Primary Chain 1936-1986 Harley-Davidson Big Twin 4-Speed 1984-2006 FXST/FLST 1991-2005 Dyna Glide
$188.06 $208.95

Diamond Primary Chain 1980-2006 Harley-Davidson FLT/FXR/FXRS/FXRT
$173.66 $192.95

DP Brakes Full Clutch Plate Kit 1998-1999 Harley-Davidson Evo Big Twin 1999-2017 Twin Cam
$304.95

The Rough Trade 1-3/8" Wrench for Top Fork Nut Harley-Davidson Hydra Glide/Big Twin Large Axle Nut
$22.31

V-Twin Manufacturing Spring Fork Shock 1997-2006 Harley-Davidson FLSTS 2005-Up FLSTSC - Black
$75.58 $100.77

Drag Specialties Rear Drive Belt - 130 Tooth - 1-1/2 inch Width - 1991-2000 Harley-Davidson Dyna
$337.57

Drag Specialties Rear Drive Belt - 130 Tooth - 1-1/2 inch Width - 1994-1999 Harley-Davidson Softail
$337.57

Cycle Electric LeBeef CE-500-CP Replacement Regulator for DGV-5000 Generator
$274.66 $294.02

Cycle Standard 41MM Chrome Fork Tubes 1977-1984 Harley-Davidson FL/FLH - 28-7/8 inch - 8 Over
$212.89

Hawg Supply Honeycomb Kicker Pedal
$109.99

Cycle Standard Clutch Cable OEM #38606-87A 1987-1994 Harley-Davidson FXR +8 inch Extended
$75.02

V-Twin Manufacturing Distributor Hold Down Clamp 1952-1970 Harley-Davidson XL 1936-1973 WL
$14.32 $20.45

Fast Eddy Co. No.26 Cylinder Head Holder - 12MM/14MM Ends
$79.95

Colony #3764-1 Foot Clutch Friction Spring Washer Disc 1936-1940 Harley-Davidson Big Twin 1938-1952 45 Solo 1938-1946 Servi-car - Parkerized
$14.30

Colony #3759-3 Carbuetor Mounting Bracket 1966 Harley-Davidson FL/FLH - Parkerized
$21.50

Colony #3740-1 Oversized Steering Head Cup 1936-1947 Harley-Davidson Knucklehead 1948-1949 Panhead 1937-1938 U Models - CAD Plated
$42.00

Colony #3145-4 Rocker Box Drain Tube Kit 1936-1937 Harley-Davidson 61 Knucklehead
$35.00

Colony #3139-4 Oversize 7/16-14 Transmission Case Bottom Stud Kit 1915-1936 Harley-Davidson Twins
$20.70

V-Factor Motorcycle Parts 18 Spoke Black Stainless Steel Brake Rotor - 11.5 inches - Rear - Replaces Harley-Davidson OEM #41789-92/41797-00
$89.95

V-Factor Motorcycle Parts 18 Spoke Stainless Steel Brake Rotor - 11.5 inches - Front - Replaces Harley-Davidson OEM #44136-92/44156-00
1 review $65.40

Dynatek Performance Electronics 2000I PC Programmable Electronic Ignition Kit for Harley-Davidsons - Includes Module and DC-6-5 Twin Fire II Mini Coil
2 reviews $506.14

Hawg Supply "Swirl" Engine Cover 1936-1954 Harley-Davidson Big Twins - Machined Finish
$99.99

Hawg Supply Bolt-On Mid Peg Mounts 1970-1999 Harley-Davidson Big Twins
$124.99

Hawg Supply Ratchet Top Shifter - Straight Arm
1 review $109.99

Cycle Standard 5-1/2 inch Forged Aluminum Handlebar Risers - Black
$92.64

Cycle Standard 5-1/2 inch Forged Aluminum Handlebar Risers - Chrome
$92.64

Cycle Standard 3-1/2 inch Forged Aluminum Handlebar Risers - Chrome
1 review $85.08

Drag Specialties 6-1/2 inch Forged Aluminum Handlebar Risers - Chrome
$79.80

Drag Specialties 6-1/2 inch Pullback Handlebar Riser Set - Black
1 review $162.13

Cycle Standard Shift Lever - 1971-1974 Harley-Davidson XL And Early Big Twins (No Splines) - Chrome - OEM #34606-71, 34606-54TA
$34.06

Cycle Standard Shift Lever - 1982-1994 Harley-Davidson FXR - Chrome - OEM #34599-81
$31.80

Cycle Standard Wagner Lockheed Type Rear Disc Brake Master Cylinder - Chrome - 1973-E1979 Harley-Davidson FL/FX
1 review $110.07

Cycle Standard Brake Pedal Rubber 1971-1975 Harley-Davidson FX (except FXWG, FXST) OEM #42394-65
$8.03

Drag Specialties Lower Fork Slider Bushings - 39mm - 0.778" - Harley-Davidson OEM #W4546587
1 review $16.00

Drag Specialties Upper Fork Slider Bushings - 39mm - 0.588" - Harley-Davidson OEM #45461-87
2 reviews $16.00

Performance Machine 1 inch Contour Billet Brake Master Cylinder 11/16" Bore - Chrome
$461.95

Performance Machine 1 inch Contour Billet Clutch Lever Assembly - Chrome
$343.95

Progressive Suspension 412 Series 12" Shocks Chrome With Short Covers 1973-1986 Harley-Davidson Shovelheads
$379.95

Progressive Suspension 412 Series 13.5" Shocks Chrome With Full Covers 1958-1972 Harley-Davidson FL/FLH
1 review $454.95

Progressive Suspension 412 Series 12" Shocks Black With Short Covers 1973-1986 Harley-Davidson Shovelheads
$379.95

Colony #3748-1 Steering Damper Friction Washer And Windshield Mount 1924-1929 Harley-Davidson LT/QT 1930- 1967 Big Twins 1937-1957 45's/Servi-car - Parkerized
$11.00

Colony #3747-2 Steering Damper Friction Washers 1930-1948 Harley-Davidson All Models 1949-1957 45's/Servi-car
$22.00

Colony #3743-5 Disc Brake Rotor Allen Screws 1982-1985 Harley-Davidson FLT Cast Wheels - Zinc Plated
$13.20

Colony #3739-1 Chain Housing Plug 1980-1984 Harley-Davidson FLT 1983-1984 FXRT
$13.75

Colony #3711-4 Rocker Arm Spacer Kit 1966-1984 Harley-Davidson FL 1971-1984 FX
$20.00

Colony #3709-5 Disc Brake Rotor Allen Screw Kit 1980-1981 Harley-Davidson FLT Cast Wheels - Zinc Plated
$12.10

Colony #3706-5 Dash Cover Mounting Kit 1936-1946 Harley-Davidson Twins - Chrome Plated
$5.50

Colony #3659-1 Linkert Main Nozzle 1940-1951 Harle-Davidson OHV
$30.00

Colony #3655-1 Linkert High Speed Needle 1936-1939 Harley-Davidson OHV - CAD Plated
$29.99

Colony #2698-1 Linkert 1st Type High Speed Needle 1936-1939 Harley-Davidson OHV - CAD Plated
$29.99

The Cyclery Bearing Adjuster Nut Socket for Springer Forks
$108.50

Samwel Supplies Reproduction Bearing Adjuster Nuts for Springer Forks - Chrome
$74.88

The Cyclery Springer Fork Windshield Apron/Guard
$85.17

Cannonball Springbrake Disc Brake Kit for I-Beam And Classic Springer Forks - Star Hub
1 review $1,656.10

Cannonball Springbrake Disc Brake Kit for I-Beam And Classic Springer Forks - 1978-1999 Narrow Dual Flange Front Hub
$1,735.88

Cannonball Extended Throwout Bearing for Stealthstarter Electric Starter 1975-1984 4 Speed Harley-Davidson Big Twins
$90.54

Drag Specialties Chrome Saddlebag Support Brackets - 1991-2017 Harley-Davidson Dyna
$150.47

Colony #3700-5 Ignition Coil Mount Plate 1985-2003 Harley-Davidson XL 1994-2001 Touring 1991-1999 Softail 1991-1994 Dyna - Chrome Plated
1 review $11.00

Colony #3701-5 Ignition Coil Mounting Plate Kit 1949-1959 Harley-Davidson Big Twins 1952-1970 K/XL - Chrome Plated
$9.90

Colony #3380-6 Fork Panel Mounting Kit 1949-1970 Harley-Davidson Big Twins 1952-1970 K/XL - Chrome Plated
$19.80

Colony #3731-2 Crankcase Bolt Set 1930-1978 Harley-Davidson Big Twins - Chrome Plated
$14.30

Colony #3730-2 Crankcase Bolt Set 1930-1978 Harley-Davidson Big Twins - CAD Plated
$14.30

Colony #3729-2 Crankcase Bolt Set 1930-1978 Harley-Davidson Big Twins - Parkerized
$14.30

Colony #3704-2 Brake Caliper Bleeder Screws 2009-Up Harley-Davidson Touring 2008-Up V-Rod - Black Oxide
1 review $8.47

Colony #3727-11 Battery Box Mounting Kit 1930-1936 Harley-Davidson VL - Parkerized
$20.90

Cycle Standard Clutch Shell With Starter Ring 1970-E1984 Harley-Davidson Big Twins - OEM #37702-70A
$266.91

Cycle Standard Clutch Shell 1941-1964 Harley-Davidson Big Twins - OEM #37703-41
$202.30

Cycle Standard 5-1/2 inch Pullback Handlebar Riser Set - Black
$106.42

Cycle Standard Handlebar Clamp - Smooth - Black
$28.12

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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