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 Ribbed Chrome Steel Fender 5 inch Width
12 reviews $202.59

Prism Supply Co. Linkert Snap Throttle Kit
$89.99

Gasbox Tall Chopper Bolt On Sissy Bar - 2004 & Up Sportsters
62 reviews $134.95

Belt Drives LTD. 8mm/2 inch Primary Open Belt Drive - Kick Start - Spline Shaft - 1955-1984 Harley-Davidson Big Twin
$808.37 $850.92

Cycle Standard 41MM Chrome Fork Tubes 1949-1976 Harley-Davidson FL - 24 inch - 4 Over
1 review $200.70

Biltwell Thunder Risers - Polished Stainless
7 reviews $199.95

Lowbrow Customs Black Heart Motorcycle Mirror - Perch Mount - Black
35 reviews $46.84

Cycle Standard 4 inch Chrome Tapered Handlebar Riser Set
24 reviews $113.39

Mooneyes MC Motorcycle Chopper Oil Tank for Harley-Davidson Choppers
10 reviews $395.00

Belt Drives LTD. 11mm/1.5 inch Primary Belt Drive - Kick Start - Spline Shaft - 1965-E1984 Harley-Davidson Big Twin
$784.84 $826.15

Shinko Motorcycle Tires SR777 Rear Motorcycle Tire - 130/90B16
2 reviews $156.95

Gasbox Evo Sportster CV Carburetor Support Bracket - 1991-2006 Harley-Davidson Sportsters
53 reviews $27.99

FNA Custom Cycle Dual Headlight Mount - Short - Stainless Steel
2 reviews $195.00

Cycle Standard 35MM Chrome Fork Tubes - 27-1/4 inch - 4 Over
5 reviews $194.89

Shinko Motorcycle Tires Classic 240 Double Whitewall Front/Rear Motorcycle Tire - MT90-16 74H
2 reviews $154.95

LePera Bare Bones Solo Seat - Pleated - fits 1984-1999 Harley-Davidson Softail
$387.00

Performance Machine Performance Machine Classic 4 Piston Brake Caliper - Polished
$385.43

Mid-USA Dual Piston Brake Caliper - Polished
$192.50

Drag Specialties Ape Hanger/Narrow TBW Handlebars - 1 inch - 14 inch Rise - Chrome
3 reviews $153.69

Mid-USA Forward Controls 1936-1999 Harley-Davidson Big Twin - 5/8" Bore - Black Billet
1 review $383.40

Goodridge 90 Degree 3/8 inch/10mm Banjo Fitting - Ebony
11 reviews $15.95

Cycle Standard 1/4 inch NPT Lever Petcock - Chrome Plated Brass
45 reviews $23.89

Lowbrow Customs Solo Seat Weld-On Spring Mounts / Perches
75 reviews $40.22

Kustom Tech Deluxe 1" Handlebar Risers - Raw Brass
26 reviews $190.36

Gasbox Chrome Kick Back Sissy Bar - Round Fender - Box Tail Light
5 reviews $189.95

Gasbox Chrome Pointed Sissy Bar - Round Fender - Box Tail Light
1 review $189.95

Cycle Standard Z Bar Handlebars - 1 inch - 8 inch Rise - Black
11 reviews From $108.37

Cycle Standard Inner Primary Chain Tensioner - 1996-2006 Harley-Davidson Twin Cam OEM# 39964-99A
$34.49

Lowbrow Customs Rear Caliper Bracket for Rigid Harleys - 11.5" Rotor - 3/4" Axle - Raw
10 reviews $108.34

Cycle Standard Solo Custom Mini Rear Brake Master Cylinder Assembly - Chrome
1 review $189.58

James Gaskets Primary Cover & Inspection Cover Gasket Kit 8-Hole Primary Cover 1970-1982 Harley-Davidson Shovelhead
$68.87

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

Cycle Standard Replacement Flat Sprocket - Chrome - 48 Tooth - 1982-1992 Harley-Davidson Sportster OEM #41470-86T
$75.02

LCFabrications Harley Davidson Electronic Speedometer Sensor Delete - Eliminator
14 reviews $30.00

Award Cycle Finned Timing Cover - Triumph Pre-Unit Generator Models
$749.99

Gasbox XLR Drag Pipe Set fits 1957 - 1980 (except 1979) Harley-Davidson Sportster XL XLH XLCH XLR ModelsLR Models - Chrome OEM #65487-59
5 reviews $249.99

Mid-USA 16" x 3.00" Black Wheel for 1973-1984 Harley Big Twin - Front or Rear - Dual Flange
5 reviews $247.55

Cycle Standard Chrome Rear Axle Kit 1980-2001 Harley-Davidson FL FLH FLT 82-94 FXR 86-06 FLST
3 reviews $67.40

Shinko Motorcycle Tires Super Classic 270 Whitewall Front Motorcycle Tire - 3.00-21 57S
$122.95

American Prime Mfg. Brake/Mechanical Clutch Control Kit for 1 inch Handlebars - 11/16 inch Bore - Black
$368.63

Cycle Standard Chrome Mesh CV Carb Air Cleaner - Sportster & Big Twin Harley
41 reviews $105.05

Cycle Standard Motorcycle Mirror Clamp - Chrome - for 1 inch Handlebars
18 reviews $23.71

Sully's Customs Sporty 2-Up Seat - Black Arched Pleat - 2004-2021 Harley-Davidson Sportsters
5 reviews $244.95

Cycle Standard Motorcycle Tire Inner Tube - 4.00 / 4.50-18" Center Metal Valve
13 reviews $22.86

Lowbrow Customs Rear Chain Adjuster for 3/4 inch Axle - Universal Motorcycle or Custom Hardtail Use
16 reviews $38.42

S&S Cycle Super E Carburetor Kit 1991-2003 Harley-Davidson Sportster XL
3 reviews $799.95

Lowbrow Customs Bolt-On Hardtail Frame 1963-1970 Triumph - Unit 650 c.c.
39 reviews $363.99

Belt Drives LTD. 8mm/1.5 inch Primary Belt Drive - Kick Start - 1955-1964 Harley-Davidson Big Twins
1 review $726.39 $764.62

Belt Drives LTD. 8mm/1.5 inch Primary Belt Drive - Kick Start - 1936-1954 Harley-Davidson Big Twins
$726.39 $764.62

Cycle Electric Regulator CE-540L for use on 12v Harley-Davidson Generators
22 reviews $181.55 $194.34

Cycle Electric Alternator Kit CE-22AR for 1970-1988 Harley-Davidson Big Twins
$362.34 $387.87

Dynatek Performance Electronics 3 Ohm Dual Output HD - For Use With Dyna Electronic Ignitions
3 reviews $144.43

Dynatek Performance Electronics 5 ohm Dual Fire Coil - for Points Ignition
4 reviews $144.43

Cycle Standard 5-3/4 inch diameter Chrome Bottom Mount Halogen Headlight
$79.99

Gremlin Wiring Gremlin Wiring Harness Kit for 1989-1999 Harley-Davidson Softail Models
$359.95

Prism Supply Co. 1/4 inch NPT Petcock - Stainless Steel
13 reviews $119.95

Gasbox Chopper DIY Sissy Bar Kit
43 reviews $89.95

American Prime Mfg. Transmission Bearing Support
4 reviews $59.95

Cycle Electric Stator CE-3845-02 for 2002 - 2005 Harley-Davidson FLH and FLT Models
11 reviews $143.49 $153.60

Burly Brand Narrow Bottom Ape Hanger Handlebars - 1 inch - 16 inch Rise - Chrome

2 $178.44 $183.95

Cycle Standard Drilled Stainless Steel Brake Rotor - 11.5 inches - Replaces Harley-Davidson OEM #44136-84A, 44136-92
$101.89

Cycle Standard 3 position Ignition Key Switch Replaces Harley-Davidson OEM #71425-77 - Chrome Body / Chrome Bezel
18 reviews $41.58

Airspeed Cycles T-Bar Handlebars - 10 inch Rise - 1 inch - Stainless Steel
2 reviews $235.00

Cycle Electric Alternator Kit CE-84T-07 2007-2008 Harley-Davidson FLH/FLT
$704.87 $754.54

Cycle Standard High Performance Clutch Pressure Plate for Harley Shovelhead Replaces OEM #37871-41
17 reviews $46.94

Mid-USA Dual Piston Brake Caliper - Chrome
3 reviews $233.75

Sully's Customs Solo Seat - Black Horizontal Pleat - Rigid Frame
3 reviews $175.00

Sully's Customs Solo Seat - Black Vertical Pleat - Rigid Frame
3 reviews $175.00

LCFabrications "The OG" Clutch Switch Pod Delete - Black - for Harley-Davidson
28 reviews $35.00

Prism Supply Co. "Super Prism" Throttle Cable for Prism Throttle Assemblies - 40 inch
$69.99

Cycle Electric Alternator Kit CE-86T 2008-2011 Harley-Davidson Softail
$699.49 $748.78

Hugh's Handbuilt HHB Harley Davidson Sprocket Lock System - Black Anodized
1 review $69.89

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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