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 #2306-16 Electrical Terminal Plate 1959-1969 Harley-Davidson Big Twin
$33.84

Gasbox Front Pipe to Frame Clamp Set for 1958 - 1969 Harley-Davidson FL Models - Parkerized - OEM #65513-58, 65512-37A
4 reviews $22.50

Colony #8807-17 Motor Mounting Kit Upper & Lower 1970-1984 Harley-Davidson Big Twin - Zinc Plated
2 reviews $33.67

Cycle Standard 10 Hole Clutch Pressure Plate 1941-1984 Harley-Davidson Big Twins
1 review $13.44

Cycle Standard Replacement Dished Sprocket - Black - 49 Tooth - 1973-1985 Harley-Davidson Big Twin 1979-81 XL
$67.19

Cycle Standard Replacement Dished Sprocket - Black - 47 Tooth - 1973-1985 Harley-Davidson Big Twin 1979-81 XL
$67.19

Colony #2523-5 Gas Tank Allen Mounting Kit 1988-1994 Harley-Davidson FXR - Chrome Plated
$13.22

Colony #3142-2 Top Plugs For Classic Springer Forks - Aluminum — Colony #3142-2 Aluminum Top Plugs For Classic Harley-Davidson Springer Forks
1 review $22.00

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

Cycle Standard Headlight Visor - 5-3/4" Headlight - Black - Replaces OEM #69738-05
$32.97 $43.96

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

Cycle Standard Transmission Seal and Quad O-ring OEM# 12067A
$9.41

V-Twin Manufacturing Forged Floorboard Tab Set for 1-1/8 inch Tubing
$65.87

Fast Eddy Co. No. 5 Cam Gauge Pins .108" 1990-1999 Harley Big Twins
2 reviews $21.95

Cycle Standard Transmission Sprocket .75" Offset - 24 Tooth - 1991-2006 Harley-Davidson XL 1986-2006 Big Twin 5-Speed
$65.74

Cycle Standard Transmission Sprocket .5" Offset - 23 Tooth - 1991-2006 Harley-Davidson XL 1986-2006 Big Twin 5-Speed
$65.74

Cycle Standard Transmission Sprocket .5" Offset - 22 Tooth - 1991-2006 Harley-Davidson XL 1986-2006 Big Twin 5-Speed
$65.74

Blue Streak High-Performance Condenser - 1970-79 Harley-Davidson
$10.95

James Gaskets Exhaust Port Gaskets - STD Heads for Harley-Davidson Shovelheads
$13.11

Lowbrow Customs Narrow Axle for 39mm Tapered Fork Lowers
$21.85

Cannonball StealthStarter Replacement Starter Relay #01-595
$65.53

Colony #7622-1 Fork Tube Bolt 1973-Mid 1985 Harley-Davidson XL/FX - Chrome Plated
1 review $32.60

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

Drag Specialties Derby Cover - Wrinkle Black - 1999-2018 Harley-Davidson Big Twin/Twin Cam
$61.95

Drag Specialties Derby Cover - Chrome - 1999-2018 Harley-Davidson Big Twin/Twin Cam
1 review $61.95

Colony #8857-8 Cylinder Base Stud Set 1978-1984 Harley-Davidson Big Twins OEM #16837-78
1 review $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 #8142-34 Motor Case Kit Acorn Head 1979-1995 Harley-Davidson Shovelhead/Evo - Chrome Plated
$63.61

Colony #8139-34 Motor Case Kit Acorn Head 1970-1978 Harley-Davidson Shovelhead - Chrome Plated
$63.61

Samwel Supplies Axle for Inline Springer Front Forks - Chrome Plated
$38.05 $63.41

Colony #9913-2 39mm Fork Tube Caps 1988-Up Harley-Davidson FX/XL - Chrome Plated
1 review $31.50

K&N Air Filters Oil Filter - Chrome - 1991-1998 Harley-Davidson Dyna - K&N Part # KN-173C
$20.99

Gasbox Axle Plate Threaded Bungs for 1936 - 1957 Harley-Davidson Big Twin Rigid Frames
2 reviews $20.99

Colony #2331-20 Battery Box Mounting Kit 1965-1984 Harley-Davidson FX/FL
$15.73

Colony #2146-2 Tappet Oil Screen & Spring 1970-1999 Harley-Davidson Big Twin
2 reviews $10.42

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

Lowbrow Customs Pursuit Shifter Peg for Harleys - Black Aluminum
44 reviews $31.10

Colony #8927-3 Gas Strainer Screen 1932-1964 Harley-Davidson Big Twins/45s OEM #62265-32
2 reviews $20.70

Colony #3571-10 Disc Brake Rotor Allen Screw Set 1978-1982 Harley-Davidson FX/XL - Zinc Plated
2 reviews $15.43

Colony #2866-1 Rear Axle Spacer 1936-1957 Harley-Davidson Big Twins - Parkerized
$20.57

Colony #8014-2 Rear Chain Adjuster Screws - 1936-1972 Harley-Davidson Knucklehead/Panhead/Shovelhead - CAD Plated
2 reviews $15.29

Colony #3652-3 Primary Inspection Cover Kit 1929-1952 Harley-Davidson 45's 1932-1973 Servi-car 1930-1936 VL - Parkerized
$20.35

Colony #8467-24 Rocker Arm Cover Screw Cap Kit Harley-Davidson Panheads - Chrome Plated
$60.12

Trader Cody's Choppers Rear Master Cylinder Mount for Harley-Davidson 4 Speeds - Stainless Steel
$30.00

Prism Supply Co. Bristol Breather - Linkert Carburetor - Polished
$60.00

Hawg Supply Swirl Points Cover For Harley Davidson Big Twin & Sportser - Polished
$59.99

Gasbox 4 Speed Transmission Mounting Plate for 1937 - 1957 Harley-Davidson Big Twins OEM #47698-36
1 review $59.95

Cycle Craft #42 Pilot Jet - 1988-2006 Keihin CV Carburetor
3 reviews $5.99

Colony #7804-6 Spark Plug Cable Packing Nut Kit 1927-1959 Harley-Davidson Coils
1 review $19.93

Colony #8837-10 Sprocket Nut & Bolt Kit Cap Head 1973-Up Harley-Davidson Big Twin/XL - Spoked Wheel - Chrome Plated
$29.70

Colony #3534-22 Rear Fender Rail Screw & Acorn Nut Kit 1980-1986 Harley-Davidson FXWG - Chrome Plated
$29.70

Colony #8901-4 Carburetor Bowl Lock Nut 1930-1965 Harley-Davidson OEM #27375-29 - Chrome Plated
$19.80

Cycle Standard Fly By Wire Throttle Tube - 1 inch - Black
26 reviews $11.79

Drag Specialties Shifter Linkage - Chrome - 1982-94 99-00 Harley-Davidson FXR
$29.63

Colony #2584-7 Steering Damper Upper Kit 1936-1948 Harley-Davidson Big Twin - Chrome Plated
$58.30

Colony #3074-8 Caliper Mounting Bolts 1973-1980 Harley-Davidson Big Twin Rear 1972-1980 Front - Zinc Plated
5 reviews $19.36

Colony #8777-20 Head Bolt Allen Screw Kit 1948-Up Harley-Davidson Panhead/Shovelhead - Chrome Plated
$57.94

Colony #7517-8 Knucklehead Rocker Arm Cover Nut Strip & Screw Plate Kit 1936-1947 Harley-Davidson Knucklehead
1 review $57.94

Lowbrow Customs Distributor Circuit Breaker Wrench for Harley-Davidson Big Twin Knucklehead Panhead #94501-56
8 reviews $19.17

Colony #2770-4 Kick Starter Pedal Mounting Kit 1942-Up Harley-Davidson - Parkerized
1 review $14.30

Colony #8601-8 Hi-Torque Cylinder Base Nut Set Harley-Davidson Big Twin Pre-Evo - Black
2 reviews $28.60

Colony #8205-8 Saddle Bag Mounting Kit 1934-1957 Harley-Davidson - Chrome - Chrome Plated
2 reviews $28.42

Drag Specialties Wheel Bearings and Races - Replaces Harley-Davidson OEM #9052
3 reviews $28.80

Colony #3553-3 Rear Axle Mount Kit 1989-Up Harley-Davidson Big Twins & XL - Chrome Plated
3 reviews $9.38

Colony #8495-1 1937-1986 Harley-Davidson Big Twin Transmission & Sportster XL Motor Case Drain Plug OEM #707 - CAD Plated
3 reviews $9.35

Colony #7612-3 Oil Line/Vent Line Fittings Pre-1965 Harley-Davidson Big Twins - CAD Plated
2 reviews $13.94

Colony #2745-2 Oversized Ignition Timer Cover Stud Kit 1972-1979 Harley-Davidson Big Twin - Zinc Plated
$13.92

Colony #2450-1 Wire Clip Front Frame Leg 1936-1969 Harley-Davidson Big Twin - Parkerized
1 review $13.92

Drag Specialties 3-1/2 inch Pullback Handlebar Riser Set - Chrome
2 reviews $57.19

James Gaskets Primary Cover & Inspection Cover Gasket Kit 1984-1986 Harley-Davidson FL/FLH/FX/FXE/FXWG 1984-1988 Softail
$55.23

Colony #2693-1 Spoke Nipple Wrench Harley-Davidson Big Twins/45s/Servi-car
$55.00

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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