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 #9817-15 Electrical Terminal Plate 1970-1974 Harley-Davidson FX/XL - Parkerized
2 reviews $25.00

James Gaskets Exhaust Port Gasket Kit - Thin Graphite Wire Gaskets & Hex Nuts - 1984-Up Harley-Davidson Evo/Twin Cam 1986-2022 XL
1 review $24.95

Cycle Electric Shim Kit CE-8120 for CE-32A Alternators on Harley-Davidsons
3 reviews $24.84

Cycle Standard Oil Filter OEM# 63840-53 for Harley-Davidson Big Twins with Filter In Tank
9 reviews $9.00

Lowbrow Customs Radius Breather Bolts for Harley-Davidson Twin Cam - Brass
3 reviews $49.49

Colony #9854-28 Upper & Lower Motor Mount Kit 1984-1999 Harley-Davidson Softail - Chrome Plated
2 reviews $49.25

Colony #8738-10 Disc Brake Rotor Bolt & Nut Kit Harley-Davidson FL/FX/XL - Chrome Plated
3 reviews $16.38

Colony #2763-5 Intake Manifold Nipple Installation Tool 1940-1954 Harley-Davidson OHV 74's 1953-1956 K/KH - Parkerized
$97.90

Colony #2085-2 Seat Post Bushing Installation Tool 1958-1984 Harley-Davidson Big Twins - Parkerized
$48.73

Colony #2540-2 Ignition Timer Cover Stud Kit 1980-Up Harley-Davidson Big Twin/XL - Zinc Plated
$13.92

Cycle Standard Shift Lever - 1974 & Up Harley-Davidson FX - Chrome - OEM #34564-74TA
5 reviews $24.00

Cycle Craft #175 Main Jet - 1988-2006 Keihin CV Carburetor
$5.99

Colony #8225-8 Rocker Shaft End Plug & Cap Kit 1971-Up Harley-Davidson Shovelhead 1971-1985 XL - CAD Plated
2 reviews $31.81

Colony #3449-10 Disc Rear Rotor To Hub Screw & Nut Kit 1979-1991 Harley-Davidson FX/XL 1981-1984 FL Spoke or Cast Wheel - Zinc Plated
4 reviews $15.73

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

Mid-USA Clutch Pushrod for Harley-Davidson Big Twins OEM #37088-90
$13.20

Colony #2105-8 Gas Tank Mounting Grommets/Spacers 1994-1999 Harley-Davidson Softail
3 reviews $15.40

Drag Specialties Vented Screw-In Gas Cap - Chrome - 1982-1996 Harley-Davidson
6 reviews $30.69

Cannonball Custom Transmission Adjuster Custom for Cannonball Transmission Base Plate 1936-1985 4 Speed Harley-Davidson Big Twins
$91.46

Drag Specialties Shifter Linkage - Chrome - 1986-2017 Harley-Davidson FLS/_FXST/_FXS/_FLST
$45.53

Colony #8010-10 Front Brake Shackle Rebuilding Kit 1940-1948 Harley-Davidson Big Twins & 45's
$90.88

Cycle Standard Oil Filter for Harley-Davidson XL FXR Softail Touring Models and Buell - Black - OEM #63805-80A 63796-77A
9 reviews $11.33

Colony #3269-5 Rear Disk Brake Rotor Screw Kit 1997-Up Harley-Davidson All Models - Zinc Plated
3 reviews $11.32

Colony #9424-8 Cylinder Base Stud Set 1985-1999 Harley-Davidson Big Twin Evo
$90.20

Drag Specialties Aramid Fiber Clutch Plate Set L1984-1989 Harley-Davidson Big Twins
$90.05

Hawthorn Co. Cycles Battery Box Antigravity 12 Cell w/ Breaker Mount
$90.00

Colony #7812-12 Inner Primary Mounting Kit - 1955-1964 Harley-Davidson Panhead
$29.98

Colony #2133-4 Handlebar Riser Allen Bolt Kit 1/2-20 x 2-3/4" - Chrome Plated
1 review $14.89

Colony #2123-4 Handlebar Riser Cupped Washers 1973-Up Harley-Davidson All Models - Chrome Plated
3 reviews $14.89

Lowbrow Customs Domed Screw-In Gas Cap for Harley-Davidson 1982-1995 / Modern Triumph Bonneville T100 / T120, Scrambler, Thruxton - Brass
10 reviews $89.06

James Gaskets Fork Seal Rebuild Kit 1984-2017 Harley-Davidson FL FX
2 reviews $22.20

James Gaskets Fork Seal Rebuild Kit 1977-1983 Harley-Davidson FL FLH FLH-80 FLT-80 FLT Classic
3 reviews $22.20

Colony #2966-10 Grade 8 Head Bolt Kit 1977-1984 Harley-Davidson Shovelhead - CAD Plated
3 reviews $44.00

Gasbox S&S Carburetor Support Bracket - Harley-Davidson Evo Big Twin and Strokers - Tumbled Stainless
10 reviews $21.95

Gasbox Heavy Duty Coil Mount - Big Twin 1965 - 1982
18 reviews $21.95

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

Lowbrow Customs Harley-Davidson Twin Cam A Motor Engine Stand
16 reviews $87.62

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

Cycle Standard Inner Shift Lever 1982-Up Harley-Davidson FL Models - Chrome - OEM #33718-82B
$28.57

Colony #7131-12 Aluminum Alloy Tubular Adjustable Pushrods & Lifter Adapters 1953-1965 Harley-Davidson Panhead
$85.45

Drag Specialties Wheel Bearings and Races for Harley-Davidson OEM #9267
$42.56

Prism Supply Co. Speedometer Cable Eliminator for 1936-1984 Harley-Davidson Big Twin 4 Speed
$16.99

Cycle Standard Exhaust Port Gasket 1984-2024 Harley-Davidson Big Twins 1986-2022 XL OEM# 17048-98 - 2 Pack
$12.10

Colony #2601-2 Brake Caliper Bleed Screws 1983-2004 Harley-Davidson Big Twin 1983-2003 XL - Zinc Plated
6 reviews $8.47

Colony #9707-18 Rear Fender Mounting Kit 1936-1957 Harley-Davidson Big Twin - Parkerized
2 reviews $42.00

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

Cycle Standard Oil Filter for Harley-Davidson Sportster and Big Twin Models - Chrome - OEM #63782-80
4 reviews $16.79

Colony #8732-24 Valve Cover Screws 1-1/4 inch Long 1954-1965 Harley-Davidson Panhead With Alloy D-Rings - Chrome Plated
1 review $41.97

Colony #3270-10 Rear Rotor to Hub Screw & Nut Kit 1992-Up Harley-Davidson XL/FLT/Softail/Dyna - Zinc Plated
$13.98

Colony #8748-12 Transmission Top Cover Allen Screw 1965-1978 Harley-Davidson Big Twin - Chrome Plated
2 reviews $27.83

Colony #8931-16 Rocker Cover Allen Head Screw Kit 1985-Up Harley-Davidson FL/FX 1986-Up XL - Chrome Plated
3 reviews $20.85

Colony #9917-8 Rocker Arm Heat Treated Stud Kit 1948-1965 Harley-Davidson Panhead
2 reviews $27.75

Cycle Standard Handlebar Clamp - Finned - Black
$27.59

Colony #8100-8 Chain Adjuster & Swingarm End Cover Kit 1973-1984 Harley-Davidson FX/FL 1979-1992 XL 1981-1987 FXR - Chrome Plated
3 reviews $41.29

Colony #3177-2 Piston Lock Ring Tool Pre-1977 Harley-Davidson K/KH 1973-Up FL
6 reviews $82.50

Colony #3081-7 Seat Spring Upper and Lower Set 1936-1957 Harley-Davidson Rigid Big Twin
3 reviews $82.50

Colony #2677-10 Extra Long Seat Post Rod Nuts Spacers Kit 1936-1980 Harley-Davidson Big Twins
$82.50

Motone Screw-In Billet Gas Cap for 1996 & later Harley-Davidson - Vented - Black
$82.47 $102.31

Cycle Standard 41mm Fork Seal Rebuild Kit - 1984-2013 Harley-Davidson FLT 1984-86 FXWG 1984-17 Softail 2012-16 FLD
2 reviews $20.54

Colony #8754-2-P Generator Smooth Allen Screws 1958-1969 Harley-Davidson Panhead & Shovelhead - Chrome Plated
$13.55

LCFabrications Micro Switch Housing - Brake Side - Double - Black - 1996-2013 Harley-Davidson
$80.00

Marion Metalworks Big Twin Fabricator Shifter Plate - Stainless Steel
$20.00

Colony #7104-2 Brass Intake Manifold Seals 1940-54 Harley-Davidson OHV 74's/61's 1953-56 K/KH
$20.00

Fast Eddy Co. No. 5 Cam Gauge Pins .108" 1990-1999 Harley Big Twins
2 reviews $39.95

Blue Streak High-Performance Points - 1970-79 Harley-Davidson
3 reviews $19.95

Colony #2912-14 Footboard Mounting Kit Parkerized Harley Davidson Big Twins 1958-64 — Colony #2912-14 Footboard Mounting Kit 1958-1964 Harley-Davidson Big Twins - Parkerized
$79.75

Colony #8801-2 Transmission Fill Plug 1940-1984 Harley-Davidson Big Twin 4 Speed - Chrome Plated
1 review $15.94

Cycle Standard Primary Chain Adjuster Kit - 1965-2000 Harley-Davidson Big Twin
4 reviews $78.99

Cometic Gasket Inc. Cam Change Gasket Kit - 1970-92 Harley-Davidson Big Twin
$26.20

Cycle Standard 39mm Fork Seal Rebuild Kit - Showa Forks - 1988-2020 Harley-Davidson XL 1988-94 FXR 1987-2005 Dyna Models
6 reviews $15.68

Drag Specialties Clutch Cable OEM #38606-87A Harley-Davidson FXST 1987-1999 +6 inch Extended
$78.39

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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