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

Gasbox Front Exhaust Pipe 1966-1969 Harley-Davidson Shovelhead - Bare Steel - OEM #65443-66
1 review $65.00

British Standard 1/4 inch BSP Petcock Fuel Valve - Reserve - For Triumph BSA Norton
17 reviews $27.72

Cycle Standard Clutch Cable OEM #38702-05 2007-2020 Harley-Davidson 883L 2007-2011 1200L 2007-2012 1200N
$64.54

EMGO Stock Triumph Style Brake & Clutch Lever Set - 7/8 inch
13 reviews $96.80

Cycle Standard Throttle Cable OEM #56356-96A Harley Dyna 1996-2008
4 reviews $38.62

Cycle Standard Replacement Front Springer Fork Fender 1993-Up Harley-Davidson FXSTS
$64.31

Unity Manufacturing TUFF Stainless Steel Brake Rotor - 10 inch - Rear
$192.86

Unity Manufacturing Solid Stainless Steel Brake Rotor - 11.5 inch - Front
$192.86

Lowbrow Customs Frisco Mount EFI Sportster Gas Tank - Standard Width - 2.5 gallon
3 reviews $192.40 $233.60

Cycle Craft #46 Pilot Jet - 1988-2006 Keihin CV Carburetor
3 reviews $5.99

Golan Products Inc. 22MM Click-Slick Petcock - Round Body - Black - Forward
$190.95

Golan Products Inc. 22MM Click-Slick Petcock - Round Body - Black - Downward
2 reviews $190.95

Golan Products Inc. 22MM Click-Slick Petcock - Round Body - Black - Backward
$190.95

Golan Products Inc. 22MM Click-Slick Petcock - Round Body - Raw Brass - Forward
2 reviews $190.95

Golan Products Inc. 22MM Click-Slick Petcock - Round Body - Chrome - Downward
$190.95

Drag Specialties Passenger Footpeg Mounting Kit - Black - 2004-2013 Harley-Davidson Sportster XL
$190.75

FNA Custom Cycle Carb Arm Support Bracket for Harley-Davidson Ironheads and Shovelheads - Tumbled
$95.00

Gasbox Chrome Kick Back Sissy Bar - Round Fender - Model A Tail Light
1 review $189.95

Gasbox Chrome Pointed Sissy Bar - Flat Fender - Model A Tail Light
2 reviews $189.95

Gasbox Chrome Square Top Sissy Bar - Round Fender - Model A Tail Light
1 review $189.95

Cycle Standard Kickstand Spring 1936-1987 Harley-Davidson Big Twins / Pre 1984 Ironhead Sportster Models - Chrome - OEM #50011-30
44 reviews $9.04

Cycle Standard Rectangular Motorcycle Mirror - Perch Mount - Black
23 reviews $37.85

British Standard Triumph 650 Foot Peg Set 1964 - 1970
13 reviews $188.95

Amal Carburetor 30mm Carb Phenolic Spacer for Triumph BSA Norton #70-7821
11 reviews $20.93

Lowbrow Customs Black Heart Clamp-On Motorcycle Mirror
8 reviews $46.94

Lowbrow Customs Fish Scale Air Cleaner Cover for S&S Super E/G - Semi Polished
20 reviews $93.80

#2233-12 Rocker Arm Shaft Washer O-Ring Kit Harley Shovelhead 66-84 — Colony #2233-12 Rocker Arm Shaft Washer O-Ring Kit 1966-1984 Harley-Davidson Shovelhead 1957-1984 XL
23 reviews $6.05

Lowbrow Customs Heartthrob Motorcycle Mirror - Clamp On - Chrome
9 reviews $46.82

Drag Specialties Small Radius Laydown 3 Bolt Style License Plate Mount Assembly - Chrome
$93.61

Lowbrow Customs Stainless Steel Solo Seat Hinge / Pivot Bracket - Bolt-On
9 reviews $93.46

Til Death Cycles Lo-Pro XL Footpeg Clevis for 2004-2022 Sportster Models with Mid Controls
1 review $93.27

Cycle Standard Exhaust Port Gasket 1984-2024 Harley-Davidson Big Twins 1986-2022 XL OEM# 65324-83 - 2 Pack
$18.65

Cycle Electric CE-546 Replacement Regulator for Harley-Davidson Model 61 6 Volt Generators
$186.19 $199.31

Cycle Standard Translucent Fuel Line - Clear - 5/16 inch ID
17 reviews $12.39

Airspeed Cycles Wide Bottom Springer Ape Hanger Handlebars - 14 inch Rise - 1 inch - Stainless Steel
$185.00

Airspeed Cycles Narrow Bottom Ape Hanger Handlebars - 14 inch Rise - 1 inch - Stainless Steel
$185.00

Lowbrow Customs Brass Gas / Oil Filler Cap - Unvented
10 reviews $36.98

Thrashin Supply Co. ARP Foot Peg Hardware Kit for Harley-Davidson FXR/XL/Dyna
$46.00

Dynatek Performance Electronics Programing Kit for Dynatek 2000I PC Programmable Ignitions
$183.71

Lowbrow Customs Radius Fork Tube Caps - Chrome - 39mm Narrow Glide Front End
6 reviews $45.76

Drag Specialties Replacement Front Fender 1954-84 Harley-Davidson FLST/FLSTC
$182.95

Lowbrow Customs Classic Grips - Metalflake Red - 1 inch
31 reviews $18.28

Cycle Standard Mustang Gas Tank - Dual Filler - 3.3 Gallon
2 reviews $182.75

Lowbrow Customs Blade Levers - Black - 1996 - 2003 Harley Davidson Sportsters and 1996 - 2017 Dyna / Softail / Touring Models
57 reviews $45.51

Red Fox Enterprises Glass License Plate Prism Reflector - Rainbow
3 reviews $14.00

Cycle Standard Clutch Cable OEM #38619-71B Harley Sportster XL 1971-1985
6 reviews $30.33

Cycle Standard 41MM Chrome Fork Tubes 1984-1999 Harley-Davidson FXWG/D FXST - 26-1/4 inch - 2 Over
$181.81

Lowbrow Customs Wheel Bearing Adapter Tophats 25mm to 3/4" - Pair
$16.50

Colony #2675-20 Footboard Mounting Kit 1936-1954 Harley-Davidson Davidson Big Twin - Parkerized
2 reviews $60.50

Cycle Electric CE-500L Replacement Regulator for DGV-5000L Generator
6 reviews $180.23 $192.93

8mm Suppression Core Cloth Spark Plug Wire Sets - Red with Black and Yellow tracers — Lowbrow Customs 8mm Cloth 90 Degree Spark Plug Wire Sets - Red with Black and Yellow tracers
21 reviews $36.03

Lowbrow Customs Black Steel Solo Seat Hinge / Pivot Bracket - Harley Ironhead Sportster 1957-1978
11 reviews $30.02

Lowbrow Customs 7mm Cloth 90 Degree Spark Plug Wire Sets - Green w/ Yellow Tracers
5 reviews $30.02

Cycle Standard Bates Style LED Tail Light - Chrome
10 reviews $30.00

Trader Cody's Choppers Rear Master Cylinder Mount for Harley-Davidson 4 Speeds - Stainless Steel
$30.00

Prism Supply Co. Bristol Breather - Linkert Carburetor - Polished
$60.00

LePera Pillion P-Pad - Smooth for Bare Bones Solo Seats - fits 1984-1999 Harley-Davidson Softail
$180.00

Hawthorn Co. Cycles Single Breaker Mount
$10.00

Custom Dynamics Micro Bullet Turn Signals - Chrome - Red
2 reviews $60.00

Custom Dynamics Micro Bullet Turn Signals - Chrome - Amber
$60.00

Custom Dynamics Micro Bullet Turn Signals - Black - Amber
1 review $60.00

Hawg Supply Swirl Points Cover For Harley Davidson Big Twin & Sportser - Polished
$59.99

Cycle Standard Replacement 39MM Fork Springs 1997-2003 Harley-Davidson XL OEM# 45376-97
$44.99

Lowbrow Customs Lowbrow Customs Springer Buckhorn Handlebars - 1 inch - Raw
$179.95

Lowbrow Customs Cole Foster Grips Black 1 inch
66 reviews $25.70

Gasbox Heavy Duty Universal 4 Speed Transmission Mounting Plate
$59.95

Cycle Standard Shift Lever - 1990-2017 Harley-Davidson Dyna/Softail - Chrome - OEM #34564-90A
$35.84

Bare Knuckle Performance Sprung Weld-On Chain Tensioner
$179.00

Dunlop Tires K70 3.25-19 Front/Rear Motorcycle Tire
5 reviews $178.95

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

Drag Specialties Rear Brake Master Cylinder Assembly - Chrome - 2007-13 Harley-Davidson Sportster XL
$178.45

Burly Brand Narrow Bottom Ape Hanger Handlebars - 1 inch - 14 inch Rise - Chrome

3 $178.44 $183.95

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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Custom Motorcycle Parts FAQ

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