What is the most important thing to decide before starting a custom motorcycle build?

Decide how the bike will be used first. Whether it’s for city riding, cross-country touring, camping, or track riding, each purpose points toward different part choices. Once the bike’s intended use is clear, selecting the right components becomes much easier. The How to Build a Bobber guide is a solid starting point for the full build process.

How do I make my motorcycle faster?

Start with a free-flowing air filter and an exhaust system that is properly tuned for your carburetor or fuel injection setup. For greater performance gains, consider increasing engine displacement with a big bore kit and improving airflow with custom camshafts or cylinder head work. Since each modification builds on the previous one, tuning after every upgrade is important.

What should I change first to make my motorcycle more comfortable?

Focus on three key areas: the seat, footpeg position, and handlebar setup. Handlebar rise and pullback typically have the greatest impact on comfort, handling, and riding posture. Investing in a quality seat can also significantly improve comfort on long rides.

Are custom Harley parts compatible with all Harley-Davidson models?

No. Fitment depends on the specific part and model year. Harley-Davidson aftermarket parts are often designed for particular platforms such as Big Twin, Sportster, or Softail models, and compatibility can vary by year range. Always review the fitment information on the product listing before ordering, and contact the supplier if compatibility is unclear.

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BEST SELLING BRANDS

TOP Custom Motorcycle Parts

Cycle Standard Narrow Alien Motorcycle Gas Tank - 2.1 gallon
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Lowbrow Customs Gas Tank Adapter Brackets 1982-2003 Harley Sportsters XL
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Lowbrow Customs Cloth Covered Wire - 12 gauge - sold by the foot - Assorted Colors Available
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Cycle Standard Round Motorcycle Mirror - Perch Mount - Chrome with Retro Blue Glass
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Drag Specialties Friction Clutch Plate Kit (5-Pack) for 1968-1984 Harley Shovelhead
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Lowbrow Customs T-Bars Handlebars - 12 Inch Rise - 1 inch Diameter - Black
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Shinko Motorcycle Tires Super Classic 270 Front Motorcycle Tire - 4.00-19 61H
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Mid-USA 21 x 2.15 Chrome Antique Style Front Spool Wheel
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Prism Supply Co. Prism Supply Co. Box Chopper Tail Light - Polished
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James Gaskets Top End Gasket Kit 1991-2003 Harley-Davidson Sportster XL 883/1200
5 reviews $124.86

Lowbrow Customs Four Piston Brake Caliper - Polished Aluminum
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Lowbrow Customs Four Piston Brake Caliper - Black Powdercoat
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Cannonball Extended Throwout Bearing for Stealthstarter Electric Starter 1936-1975 4 Speed Harley-Davidson Big Twins
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Drag Specialties 530 O-Ring Drive Chain - 120 Links includes Master Link - Chrome
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Cycle Standard Z Bar Handlebars - 1 inch - 6 inch Rise - Chrome
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Sully's Customs Sporty 2-Up Seat - Black H-Pleat - 2004-2021 Harley-Davidson Sportsters
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Kustom Tech Deluxe 1" Handlebar Risers - Chromed Brass
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Lowbrow Customs Tsunami Fender - Raw Aluminum - 1994 - 2003 Sportsters
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Cycle Standard Box Chopper Tail Light
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Cycle Standard Dished Wassell Peanut Frisco Mount Shallow-Tunnel Gas Tank - 2.2 gal
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Cycle Standard Dished Wassell Peanut Mid-Tunnel Gas Tank - 2.0 gal
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Cycle Standard Bobbed Rear Fender With 1973-Up Light Mount for 1984-1999 Harley-Davidson Softail
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LePera Baron II One Piece Seat - Diamond - Rigid Frame
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Gasbox Motorcycle Parts Chrome Square Top Sissy Bar - Round Fender - Box Tail Light — Gasbox Chrome Square Top Sissy Bar - Round Fender - Box Tail Light
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Prism Supply Co. Derby Cover Foot Clutch Kit - Polished Cover - 1994-2003 Harley-Davidson Sportster
1 review $314.99

Cycle Electric Alternator Kit CE-60AR for 1970-1984 Harley-Davidson 4 Speed Solid Mount Motors
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Cycle Electric Stator CE-9100 for 1991-2006 Harley-Davidsons Sportster - OEM #29967-89
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Kustom Tech DeLuxe 1 inch Master Cylinder Polished Aluminum
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Mooneyes 60 psi Oil Pressure Gauge
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Cycle Craft Carburetor Rebuild Kit 1988-2006 Harley-Davidson CV Carbs
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Lowbrow Customs Beck Grips - Black - 1 inch
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D.I.D. Chains 530 VX3 X-Ring Chain - 130 Links - Gold
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Cycle Standard 1936-1986 Harley-Davidson Big Twin 4 Speed Complete Kickstarter Rebuild Kit
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Cycle Standard Drilled Stainless Steel Brake Rotor - 11.5 inches - Replaces Harley-Davidson OEM #41797-00
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Cycle Electric Alternator Kit CE-62AR for 1991-1998 Harley-Davidson Dyna 1984-1999 Softail Models
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V-Factor Motorcycle Parts MCM Slash Cut Drag Pipes 1986-2006 Harley-Davidson Softail - Chrome
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Cycle Standard Drilled Stainless Steel Brake Rotor - 10 inches - Replaces Harley-Davidson OEM #41807-73, 41813-79
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Motone Screw-In Billet Gas Cap for 1996 & later Harley-Davidson - Vented - Satin Brass
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Lowbrow Customs Domed Steel Motorcycle Oil Tank for Triumph Choppers
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Biltwell Slimline Risers - Polished Stainless Steel - 1 inch
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Gasbox Dog Dish Air Cleaner - Fits S&S Super E / G Carburetors
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Lowbrow Customs Finned Heat Shield, 12 inch
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Mooneyes MOON Spun Aluminum Air Cleaner for CV or S&S Super E/G Carburetors
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Cycle Standard Wassell Peanut Frisco Gas Tank 2.1 gallon
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Choppahead Clamp On Aluminum Oil Tank - 1954 - 1970 Triumph 650 - Finned Ends
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Mooneyes Finned Points Cover for Harley-Davidson Sportsters
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Cycle Standard 39MM Chrome Fork Tubes - 25 inch - Stock Length
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Airspeed Cycles Wide Bottom Springer Ape Hanger Handlebars - 11 inch Rise - 1 inch - Stainless Steel
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Cycle Electric Stator CE-8999 for 1989-1999 Harley-Davidson Evo Big Twins with 32 amp Alternator
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Antigravity Batteries Antigravity Lithium Small Case Battery - 16 Cell - AG-1601
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Cycle Standard Z Bar Handlebars - 1 inch - 4 inch Rise - Black
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Sully's Customs Skinny Style Seat - Black Diamond - 1982-2003 Harley-Davidson Sportsters
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Gasbox Shovelhead Exhaust Pipe Set 2-into-1 for 1970-84 Harley Cone - Bare Steel OEM #65435-70
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S&S Cycle Carb Mainfold Insulator Block for Super E Carburetors S&S Cycle #16-0491
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Lowbrow Customs T-Bars Handlebars - 10 inch Rise - 1 inch Diameter - Black
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Shinko Motorcycle Tires Super Classic 270 Front/Rear Motorcycle Tire - 4.50-18 70H
1 review $142.95

Prism Supply Co. 1/4 inch NPT Petcock - Brass
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Lowbrow Customs Throttle Housing 1996 & up Harley Push-In Dual Cable - Black - 1 inch
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Lowbrow Customs Throttle Housing 1996 & up Harley Push-In Dual Cable - Aluminum - 1 inch
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Lowbrow Customs Belt to Chain Conversion Kit Harley 1200 Sportster 2004 & up - Black Sprocket
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Gasbox Evo Sportster CV Carburetor Support Bracket - 1991-2006 Harley-Davidson Sportsters - Tumbled Aluminum
26 reviews $34.95

The Speed Merchant 39mm Speed Triple Trees - Black - 1991-05 Harley-Davidson FXD 1988-20 XL 1988-00 FXR
$836.96 $929.95

Lowbrow Customs Belt to Chain Conversion Kit Harley-Davidson Dyna 1994-99 - Chrome Sprocket
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James Gaskets Primary Cover Gasket & Seal Kit - 1991-2003 Harley-Davidson Sportster
2 reviews $30.70

Cycle Standard Blackbird Legacy Gas Tank for 2007-2022 EFI Harley-Davidson Sportsters - 3.5 gallon
20 reviews $275.08

Lowbrow Customs S&S Super E and G Carb Extended Float Bowl Screws - Brass
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Cycle Standard Laredo Gas Tank - Center Filler
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Cycle Standard Harley King Sportster Gas Tank 2.9 Gallon Stock Style for 1995-2003 with Left Side Petcock
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Mooneyes Finned Points Cover for Harley-Davidson Big Twins
37 reviews $67.67

Drag Specialties Skeleton Kickstarter Pedal - Brass
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CUSTOM MOTORCYCLE PARTS FOR HARLEY, TRIUMPH, AND BSA BUILDS The parts you choose define the bike. OEM keeps it stock. Aftermarket opens up fitment, finish, and function options the factory never offered. Whether you are sourcing a direct replaceme...

CUSTOM MOTORCYCLE PARTS FOR HARLEY, TRIUMPH, AND BSA BUILDS

The parts you choose define the bike. OEM keeps it stock. Aftermarket opens up fitment, finish, and function options the factory never offered. Whether you are sourcing a direct replacement for a worn component or tracking down a specific piece to finish a chopper or bobber build, the catalog here covers custom Harley parts, BSA, and vintage Triumph across hundreds of categories.

WHY BUILDERS GO AFTERMARKET

Stock parts do the job they were designed for. Aftermarket custom motorcycle parts do what the builder needs:

Fitment Where OEM Falls Short: Finding correct OEM components for older Harley Big Twin, BSA, or vintage Triumph motorcycle parts gets harder every year. Aftermarket and reproduction parts fill those gaps with components built to the same spec or better.
Material and Finish Options: Many aftermarket parts come in finishes the factory never offered, including billet aluminum, stainless, black oxide, and chrome. The part matches the direction of the build rather than fighting it.
Universal Parts for Custom Work: Raw, unfinished, and universal parts give you a starting point to cut, shape, and mount to your specific frame and geometry. That is something a stock replacement never offers, and it is where bobber motorcycle parts and chopper builds get interesting.
Cost and Availability on Older Platforms: For british motorcycle parts and vintage Triumph or older Harley platforms, reproduction aftermarket parts are often the more practical choice on both availability and price.

BRANDS AND WHAT WE STOCK

The catalog covers hardware, fabrication parts, engine components, controls, lighting, and everything in between. Key brands include Colony for hardware and fasteners and Mid-USA for drivetrain and engine components. Fitment data is listed on each product page. If you are not sure what fits your year and model, the team is reachable by chat, phone, or email.

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