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

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Cycle Electric Stator CE-9100 for 1991-2006 Harley-Davidsons Sportster - OEM #29967-89
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Prism Supply Co. Prism Supply Co. Box Chopper Tail Light - Polished
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Lowbrow Customs Complete Chopper Wiring Harness 2007-2013 EFI Harley-Davidson Sportster
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Lowbrow Customs Rigid Frame Axle Plate Set OEM Harley-Davidson Style
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Cycle Standard Stock Style Harley-Davidson Sportster Gas Tank 2004-2006 - 2.2 gallon
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Lowbrow Customs Shotgun Exhaust Pipes 2004-21 Harley-Davidson Sportster XL Chrome
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Shinko Motorcycle Tires Super Classic 270 Front Motorcycle Tire - 4.00-19 61H
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Cycle Standard 41MM Chrome Fork Tubes 1984-1999 Harley-Davidson FXWG/D FXST - 30-1/4 inch - 6 Over
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Cycle Standard 8 inch Mini Apes Handlebars - Chrome Finish
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Cycle Electric Generator DGV-5000-LH 12 Volt Low Voltage - 1936-1964 Harley-Davidsons w/Heli Coils
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Til Death Cycles 49mm Harley-Davidson Front End Extended Damper Tube Kit
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Cycle Standard 41MM Chrome Fork Tubes 1949-1976 Harley-Davidson FL - 26 inch - 6 Over
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Avon Tyres AM7 Safety Mileage Mark II Tire 4.00-18 inch
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Belt Drives LTD. 8mm/2 inch Primary Open Belt Drive - Kick Start - Spline Shaft - 1955-1984 Harley-Davidson Big Twin
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Lowbrow Customs Premium Stainless Steel Intake Clamp & Seal Kit 1955-1977 Harley-Davidson FL/FX/XL
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Lowbrow Customs Banana Gas Tank - Deep Tunnel - 1.8 gallon
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Mid-USA Forward Controls 1936-1999 Harley-Davidson Big Twin - 5/8" Bore - Polished Billet
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Gasbox 007 Stainless Air Cleaner for 1991-2022 Harley-Davidson CV Carburetor/EFI
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Gasbox Dog Dish Air Cleaner - Fits S&S Super E / G Carburetors
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Gasbox Full Rigid Chopper Frame 2004-2022 Harley-Davidson Sportsters - 3" Up - Frisco Tank Mounts - Horseshoe Oil Tank
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Lowbrow Customs 39mm Solid Handlebar Riser Bushings for Harley-Davidson - Aluminum
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American Prime Mfg. Comp Master Ignition Advance Unit - 1970-Up Harley-Davidson Replaces OEM #3251770T
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American Prime Mfg. Brake/Mechanical Clutch Control Kit for 1 inch Handlebars - 9/16 inch Bore - Chrome
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Antigravity Batteries Antigravity Lithium Small Case Battery - 4 Cell - AG-401
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Gremlin Wiring Builders Box Custom Wiring Harness Kit - Motorcycles With Points And After Market Electronic Ignitions
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American Prime Mfg. Transmission Bearing Support
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Cycle Standard Front Brake Master Cylinder Assembly - Black - Single Disc 1996-2017 Models (EXCEPT 15-17 Softail, 08-17 Dressers, Trike, 04-17 XL)
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ODI Vans/Cult V-Twin Motorcycle Grips by ODI - Black - 1 inch
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Podtronics Podtronics Regulator / Rectifier - Triumph / BSA
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LePera Bare Bones Solo Seat - Diamond - fits 1984-1999 Harley-Davidson Softail
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Coker Tire Classic Cycle Motorcycle Tire 5.00-16
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Cycle Standard Bayonet / Cam Harley Style Vented 2" Gas Cap - Chrome
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Lowbrow Customs Belt to Chain Conversion Kit Harley 1200 Sportster 1995-2003 - Black Sprocket
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Sully's Customs Skinny Style Seat - Black Vertical Pleat - 1982-2003 Harley-Davidson Sportsters
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Mullins Chain Drive 39mm Super Narrow Triple Trees Set
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Gremlin Wiring The Sportster Treatment Custom Wiring Harness Kit 1998 Harley-Davidson Sportster Models
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Gasbox Gasbox "Lorain" Full Frame 1957-1985 Harley-Davidson Ironhead Sportsters
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Old-Stf Cycle Centerline Adjustable Aluminum Transmission Plate - Harley-Davidson Big Twin 4 Speeds
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Kustom Tech DeLuxe 1 inch Clutch Lever Polished Aluminum & Brass
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Gasbox Universal Battery Box for YTZ-12S Electric Start Motorcycle Battery
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Antigravity Batteries Antigravity Lithium Small Case Battery - 8 Cell - AG-801
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Cycle Standard 35MM Chrome Fork Tubes - 29-1/4 inch - 6 Over
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Mooneyes Moon Emergency Tank Fuel Reserve Bottle and Carrier
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Gasbox Gasbox Classic DIY Sissy Bar Kit
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LePera Signature One Piece 14" Back Seat - Diamond/Buttons - Rigid Frame
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LePera Baron II One Piece Seat - Diamond - Rigid Frame
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S&S Cycle Super E Carburetor Kit 1957-78 Harley-Davidson O-Ring Sportster XL
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V-Factor Motorcycle Parts MCM Slash Cut Drag Pipes 1986-2006 Harley-Davidson Softail - Chrome
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Cycle Electric Alternator Kit CE-82T 2006-2007 Harley-Davidson Dyna Models
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Cycle Standard Ribbed Chrome Steel Fender 5 inch Width
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Lowbrow Customs Forward Control Kit 1991-2003 Harley-Davidson Sportsters - Black Anodized
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Diamond 530 Drive Chain - 110 links USA made
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Kustom Tech Internal Throttle Kit - Right Side 1 inch
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Kustom Tech Classic 1 inch Clutch Lever Polished Aluminum
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Cycle Standard 11" Chrome Shocks With Chrome Spring - 1 inch Under - 1973-1984 Harley-Davidson FX/FXE 1972-1984 FL
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Sully's Customs Solo Seat - Black Diamond - Rigid Frame
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Gremlin Wiring Gremlin Wiring Harness Kit for 1949-1999 Kick-Only Shovelhead & Big Twin Models
1 review $199.99

Cycle Standard 35MM Chrome Fork Tubes - 31-1/4 inch - 8 Over
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Lowbrow Customs Louvered Air Cleaner for Harley CV / EFI 1991-2020 - Chrome
82 reviews $81.78

Cycle Standard Braided Stainless Cut-To-Length Compression Brake Line Kit - Clear Coating
2 reviews $62.81

Lowbrow Customs Complete Solid Motor Mount Kit for 2004 - Up Harley-Davidson Sportster XL
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Mid-USA Four Piston Brake Caliper - Chrome
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Lowbrow Customs Weatherproof Starter Ignition Switch - Brass Bezel
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Progressive Suspension 412 Series 11" Chrome Shocks - Full Cover 2004-2021 Harley-Davidson XL
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Drag Specialties 530 O-Ring Drive Chain - 120 Links includes Master Link - Chrome
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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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