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.

Custom Motorcycle Parts

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BEST SELLING BRANDS

TOP Custom Motorcycle Parts

Cycle Standard 8-1/2 inch Pullback Handlebar Riser Set - Chrome
1 review $125.27

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

Cycle Standard Shift Lever - 1971-1974 Harley-Davidson XL And Early Big Twins (No Splines) - Chrome - OEM #34606-71, 34606-54TA
$30.96

Cycle Standard Shift Lever - 1982-1994 Harley-Davidson FXR - Chrome - OEM #34599-81
$28.91

Cycle Standard Shift Lever - 1974-1984 Harley-Davidson FL 1980-1986 FXWG (With Splines) - Chrome - OEM #34606-74
$22.97

Cycle Standard Shift Lever - 1990-2017 Harley-Davidson Dyna/Softail - Chrome - OEM #34564-90A
$32.58

Cycle Standard Wagner Lockheed Type Rear Disc Brake Master Cylinder - Chrome - 1973-E1979 Harley-Davidson FL/FX
1 review $104.83

Cycle Standard Brake Pedal Rubber 1971-1975 Harley-Davidson FX (except FXWG, FXST) OEM #42394-65
$7.30

Performance Machine 1 inch Contour Billet Brake Master Cylinder 11/16" Bore - Chrome
$461.95

Performance Machine Vintage 4 Piston Caliper 125 X 4R - Black
$586.95

Performance Machine Vintage 4 Piston Caliper 125 X 4R - Chrome
$599.95

Progressive Suspension 412 Series 12" Shocks Chrome With Short Covers 1973-1986 Harley-Davidson Shovelheads
$379.95

Progressive Suspension 412 Series 12" Shocks Chrome With Full Covers 1973-1986 Harley-Davidson Shovelheads
$454.95

Progressive Suspension 412 Series 12" Shocks Black With Short Covers 1973-1986 Harley-Davidson Shovelheads
$379.95

Colony #3745-1 Steering Damper Lower Frame Bracket 1940-1952 Harley-Davidson 45's 1940-1957 Servi-car - Parkerized
$20.00

Colony #3746-1 Steering Damper Lower Frame Bracket 1940-1952 Harley-Davidson 45's 1940-1957 Servi-car - CAD Plated
$20.00

Samwel Supplies Axle for Inline Springer Front Forks - CAD Plated
1 review $38.87 $64.78

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 #3747-2 Steering Damper Friction Washers 1930-1948 Harley-Davidson All Models 1949-1957 45's/Servi-car
$22.00

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 #3738-1 Pinion Gear Nut 1990-1992 Harley-Davidson Big Twins
$17.05

Colony #3722-2 Sprocket Cover Pin 1941-1973 Harley-Davidson 45's
$9.90

Colony #3710-12 Shifter Linkage Mounting Kit 1975-1976 Harley-Davidson XLH/XLCH - Zinc Palted
$13.75

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

Samwel Supplies Reproduction Bearing Adjuster Nuts for Springer Forks - CAD Plated
$54.43

The Cyclery Springer Fork Windshield Apron/Guard
$85.17

Cannonball Springbrake Disc Brake Kit for I-Beam And Classic Springer Forks - 1978-1999 Narrow Dual Flange Front Hub
$1,735.88

Kustom Tech Classic 1 inch Master Cylinder Polished Aluminum - 12 mm Bore
$447.34

Colony #3723-3 Truss Rod Right Front Coupling 1951-1973 Harley-Davidson Servi-car - Parkerized
$20.00

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

Colony #3721-1 Ovesize Allen Timing Plug 1970-1998 Harley-Davidson Dyna 1970-1999 Softail 1970-2003 Sportster - CAD Plated
$7.58

Colony #3380-6 Fork Panel Mounting Kit 1949-1970 Harley-Davidson Big Twins 1952-1970 K/XL - Chrome Plated
$19.80

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 #3725-12 Center Stand Mounting Kit 1957-1981 Harley-Davidson Sportster XL
$56.68

Colony #3705-2 Brake Caliper Bleeder Screws 2009-Up Harley-Davidson Touring 2008-Up V-Rod - Chrome Plated
$10.29

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

Arrow Manufacturing Dyme Piece Tail Light
$285.00

LePera Signature II Two Piece Seat - Diamond - Rigid Frame
$479.00

LePera Cobra Seat - Diamond- Rigid Frame
1 review $479.00

LePera Cobra Seat - Smooth - Rigid Frame
1 review $433.00

LePera Kickflip Seat - Diamond - 2010-2023 Harley-Davidson Sportsters
$548.00

LePera Sprocket Solo Seat - Smooth - 2004-2023 Harley-Davidson Sportsters
$364.00

LePera Sprocket Solo Seat - Diamond - 2004-2023 Harley-Davidson Sportsters
$410.00

LePera Cobra Full-Length Seat - Diamond - 2004-2023 Harley-Davidson Sportsters
$479.00

LePera Cherokee Seat - Smooth - 2004-2023 Harley-Davidson Sportsters
$479.00

LePera Cherokee Seat - Pleated - 2004-2023 Harley-Davidson Sportsters
1 review $548.00

LePera Cherokee Seat - Diamond - 2004-2023 Harley-Davidson Sportsters
$548.00

LePera Silhouette Solo Seat - Smooth - 1958-1978 Harley-Davidson Sportsters
$318.00

Avon Tyres Avon Safety Mileage MKII 5.00-16 Tire
19 reviews $292.44

Lowbrow Customs Moto Luggage Rack - Right Side - 2006-2017 Harley-Davidson Dyna
$89.24 $104.99

Lowbrow Customs Moto Luggage Rack - Left Side - 2006-2017 Harley-Davidson Dyna
$89.24 $104.99

Lowbrow Customs Moto Luggage Rack - Right Side - 2004-2022 Harley-Davidson Sportsters
$127.49 $149.99

Lowbrow Customs Moto Luggage Rack - Right Side - 1994-2003 Harley-Davidson Sportsters
$127.49 $149.99

Lowbrow Customs Moto Luggage Rack - Left Side - 2004-2022 Harley-Davidson Sportsters
$89.24 $104.99

Lowbrow Customs Moto Luggage Rack - Left Side - 1994-2003 Harley-Davidson Sportsters
$89.24 $104.99

Cycle Standard Steel Clutch Plate Set 1984-1990 Harley-Davidson Sportster XL
$44.27

Cycle Standard Clutch Friction Disc Set 1984-1990 Harley-Davidson Sportster XL
$91.07

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

Cycle Standard Tapered T-Bar Extensions - 1.5" High/1" Handlebars - Black
1 review $32.21

Cycle Standard Primary Inspection Cover - Chrome - 2004-2021 Harley-Davidson Sportster XL
1 review $49.28

Unity Manufacturing TUFF Stainless Steel Brake Rotor - 11.5 inch - Rear
$189.99

Unity Manufacturing TUFF Stainless Steel Brake Rotor - 11.5 inch - Front
$189.99

Unity Manufacturing TUFF Stainless Steel Brake Rotor - 10 inch - Rear
$189.99

Unity Manufacturing TUFF Stainless Steel Brake Rotor - 10 inch - Front
$189.99

Unity Manufacturing Solid Stainless Steel Brake Rotor - 10 inch - Rear
$189.99

Unity Manufacturing Solid Stainless Steel Brake Rotor - 10 inch - Front
$189.99

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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