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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Bare Knuckle Performance Overbearing - For Use With All OEM Clutch and Drive Components
$149.00

Bare Knuckle Performance Overbearing 2.0 - For Use With Aftermarket Clutch and Drive Components
$149.00

Gasbox Full Rigid Chopper Frame 1936-1999 Harley-Davidson Big Twin 5 Speed - 3" Up - Frisco Tank Mounts - Horseshoe Oil Tank
3 reviews $1,799.00

Gasbox Full Rigid Chopper Frame 1936-1999 Harley-Davidson Big Twin 5 Speed - 3" Up - Sporty Tank Mounts - Horseshoe Oil Tank
1 review $1,799.00

Gasbox Full Rigid Frame 1936-1999 Harley-Davidson Big Twin 5 Speed - Sporty Tank Mounts - Horseshoe Oil Tank
$1,799.00

Gasbox Full Rigid Frame 1936-1999 Harley-Davidson Big Twin 4 Speed - Sporty Tank Mounts - Horseshoe Oil Tank
1 review $1,799.00

Cycle Electric LeBeef Generator DGV-5000-CP 12 Volt - 1965-1984 Harley-Davidsons
$638.37 $683.35

Cycle Standard Transmission Sprocket .75" Offset - 24 Tooth - 1991-2006 Harley-Davidson XL 1986-2006 Big Twin 5-Speed
$70.34

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

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

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

V-Twin Manufacturing Spring Fork Shock 1997-2006 Harley-Davidson FLSTS 2005-Up FLSTSC - Black
$70.54 $100.77

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 Electric LeBeef CE-540-CP Regulator for use on 65a 12v Harley-Davidson Generators
$275.98 $295.43

Hawg Supply Honeycomb Kicker Pedal
$109.99

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

Drag Specialties Clutch Cable OEM #38606-87A Harley-Davidson FXST 1987-1999
$73.09

Drag Specialties 15A Circuit Breaker 1970-1999 Harley-Davidson Big Twin/XL 1999 Twin Cam
1 review $10.95

Drag Specialties 40A Circuit Breaker 1970-1999 Harley-Davidson Big Twin/XL 1999 Twin Cam
$7.95

V-Twin Manufacturing Distributor Hold Down Clamp 1952-1970 Harley-Davidson XL 1936-1973 WL
$9.95 $20.45

Drag Specialties Clutch Cable OEM #38599-83A Harley-Davidson FXST 1987-1999
$73.09

Fast Eddy Co. No. 42 Starter Clutch/Kicker Gear Puller
$249.95

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 #3733-1 Steering Head Cup 1936-1947 Harley-Davidson Knucklehead 1948-1949 Panhead 1937-1938 U Models - CAD Plated
1 review $42.00

Colony #3732-1 Upper/Lower Fork Neck Bearing Race 1936-1949 Harley-Davidson Knucklehead 1937-1948 Big Twin U Models 1948-1949 Panhead
$27.00

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

Colony #3140-4 Oversize 1/2-13 Transmission Case Bottom Stud Kit 1915-1936 Harley-Davidson Twins
$22.45

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

Cycle Standard Front Brake Master Cylinder Assembly - Chrome - Single Disc 1996-2017 Models (EXCEPT 15-17 Softail, 08-17 Dressers, Trike, 04-17 XL)
2 reviews $230.05

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

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

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

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 - Black
1 review $135.63

Drag Specialties 6-1/2 inch Forged Aluminum Handlebar Risers - Chrome
$73.09

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

Cycle Standard Shift Lever Bracket 1970-1984 Harley-Davidson FL Models - OEM #33630-70
$60.53

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 Shift Lever - 1990-2017 Harley-Davidson Dyna/Softail - Chrome - OEM #34564-90A
$35.84

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

Performance Machine 1 inch Contour Billet Brake Master Cylinder 9/16" Bore - Chrome
$461.95

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 #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

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

PanAm Oils Inc. Oil/Ignition Shut-Off Valve Pre-2000 Harley-Davidson
1 review $249.49

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

Colony #3728-4 Rear Axle Nut & Washer Kit 1973-Up Harley-Davidson Big Twins 1979-Up XL
$14.30

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

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

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

Motion Pro Clutch Spring Compression Tool - Harley-Davidson XL/Big Twin
2 reviews $81.99

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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