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

Lowbrow Customs Domed Steel Motorcycle Oil Tank for Triumph Choppers
17 reviews $224.94

Gasbox Strong Arm Top Engine Mount For Early Big Twin Engines In Gasbox Frames
$74.95

Gasbox Antigravity 4 Cell Universal Battery Box Flat Mount - Tumbled Aluminum
23 reviews $44.95

James Gaskets Primary Cover Gasket 1965-1988 Harley-Davidson Big Twin
$24.91

Goodridge Universal Braided Stainless Brake Line - 17" - Ebony
$31.95

Cycle Standard 41MM Chrome Fork Tubes 1984-1999 Harley-Davidson FXWG/D FXST - 32-1/4 inch - 8 Over
$223.64

Gates Corporation 5/16 inch Black Fuel / Oil Line - By The Foot
11 reviews From $11.18

Cycle Standard Lucas Non-Resistor Type Spark Plug Cap
1 review $12.38

James Gaskets Fork Seal Rebuild Kit 1949-1977 Harley-Davidson FL
$22.20

Cycle Standard Throttle Cable OEM #56308-88 Harley Sportster XL 1988-1995
13 reviews $27.71

British Standard Clutch Cable for Triumph 650cc 1968-1972 Made in UK OEM #60-1993
4 reviews $55.37

Cycle Standard Deluxe Chrome Motorcycle Brake Light Switch Harley-Davidson 1937-1957 Knucklehead Panhead Flathead OEM #72004-39
15 reviews $31.60

Led Sled Customs Universal Kickstand with Internal Spring - for 1 inch tubing - Black
10 reviews $109.95

Led Sled Customs Universal Kickstand with Internal Spring - for 1-1/4 inch tubing - Black
12 reviews $109.95

Drag Specialties 1157 Style Mini Replacement 12V Dual Filament Bulb - 10 Pack
9 reviews $16.91

ODI Vans/Cult V-Twin Motorcycle Grips by ODI - Iridescent Purple - 1 inch
14 reviews $21.95

Lowbrow Customs Finned Heat Shield - 6 inch
25 reviews $73.16

Drag Specialties Dual Gauge Bracket - Black - 1995-2001 Harley-Davidson XL1200 99-05 FXDX 95-00 FXDX-CONV
2 reviews $219.37

Drag Specialties Dual Gauge Bracket - Chrome - 1995-2001 Harley-Davidson XL1200 99-05 FXDX 95-00 FXDX-CONV
$219.37

Rich Phillips Seat Co. Snub Nose Leather Solo Seat - Buckskin
4 reviews $219.00

Rich Phillips Seat Co. Leather Solo Seat - Buckskin
3 reviews $219.00

Rich Phillips Seat Co. Leather Solo Seat - Black
52 reviews $219.00

Drag Specialties Wheel Bearings and Races - Replaces Harley-Davidson OEM #9052
3 reviews $27.37

Cycle Standard Z Bar Handlebars - 1 inch - 2 inch Rise - Black
1 review From $109.34

Cycle Standard Bayonet / Cam Harley Style Vented 2" Gas Cap - Black
33 reviews $19.84

Reverb Inc. Reverb Vintage Style Cable Wrap - Black/White
8 reviews $31.12

Cycle Standard Bobbed Undrilled Rear Fender - 1989-2003 Harley Davidson Sportster XL Models
8 reviews $217.73

EBC Brakes Sintered Rear Brake Pads 1991-98 H-D FXD/FXDL/FXDWG 84-94 FXR L87-99 FXST/FXSTB/FXSTC/FXSTS/FLST/FLSTC/FLSTF/FLSTS
2 reviews $54.14 $56.31

Lowbrow Customs Narrow Axle for 39mm Tapered Fork Lowers
$24.04

Cycle Standard 3/8 inch NPT Petcock Straight Outlet
28 reviews $43.26

Drag Specialties 3-1/2 inch Pullback Handlebar Riser Set - Black
$108.07

Cycle Standard Derby Cover - Chrome - 2004-2021 Harley-Davidson Sportster XL
2 reviews $54.01

Mooneyes Rat Fink Head License Plate Bolts - Gray
10 reviews $18.00

Arlen Ness Big Sucker Stage 1 Air Filter Kit - Chrome - 1993-1999 Harley-Davidson Evolution Big Twin
2 reviews $215.96 $239.95

Standard Motorcycle Products Points & Condenser Kit 1970-E1978 Harley-Davidson Shovelhead (L1978-1984 Big Twin if converted to points) 1971-E1978 XL
$17.95

Goodridge 45 Degree 3/8 inch/10mm Banjo Fitting - Stainless Steel
6 reviews $17.95

Bates Linkert 4-Bolt Carb Throttle Conversion Kit 1940-65 Harley-Davidson Knucklehead and Panheads
3 reviews $71.73

Colony #7516-4 Aluminum Pushrods for Hydraulic Lifters - 1966-1983 Harley-Davidson Shovelhead
5 reviews $71.50

Colony Ignition Switch Bezel for 1948-1959 Harley-Davidson Model 125/165 Hummer Gas Tanks
4 reviews $30.62

Lowbrow Customs Lowbrow Customs Springer Buckhorn Handlebars - 1 inch - Chrome
$214.23

Cycle Standard Springer Style Bottom Mount Headlight - Chrome
11 reviews $107.03

Shinko Motorcycle Tires SR777 Front Motorcycle Tire - 100/90-19
6 reviews $106.99

Cycle Standard Ride-On Engine Stablizer Link Kit 1982-94 Harley-Davidson FXR 91-94 Dyna 80-08 Touring
$106.96

EMGO Triumph 650cc Stock Style Header Exhaust Pipes 1963-1970 OEM #70-5957 70-5958
13 reviews $213.88

Cycle Standard Blackout Taillight 1999-2015 Harley-Davidson FL/FX/Sportster (except 12-15 XL1200C/CP)
2 reviews $71.27

British Standard Pushrods for Triumph Bonneville 650 Motorcycles - Set of 4- OEM #70-2620
2 reviews $106.82

Lowbrow Customs Rocker Box Oil Pressure Gauge Adapter Fitting - Brass - 1971 - Up Harley-Davidson Shovelhead, 1971 - 1985 Sportster
8 reviews $30.51

Cycle Standard 5-3/4 inch diameter Diamond Chrome Halogen Headlight - Clear Lens
14 reviews $106.68

Goodridge 30330TC-CL Universal Braided Stainless Brake Line - 30" - Clear Coated
4 reviews $70.95

British Standard Pancake Air Filter Triumph - Thread On Triumph T120/T140
2 reviews $53.20

Cycle Standard Fuel Injection Fuel Line Assembly +3 inch - 2007-2022 Harley-Davidson Sportster
1 review $70.91

Cycle Standard Clutch Cable OEM #38699-04 2004-Up Harley-Davidson Sportster XL
12 reviews $70.79

Lowbrow Customs Speedometer Gauge Riser Mount for 1 inch T-Bar Handlebars - Black
11 reviews $105.93

Cycle Standard Domed Slim Chrome Screw-In Harley Style Gas Cap 1996 & up
16 reviews $30.25

Cycle Standard Screw-In Harley Stock Style Vented Gas Cap - 1982-1995 - Black
$23.51

Kustom Tech Motorcycle Parts Classic 1 inch Brake Lever - Raw Aluminum — Kustom Tech Classic 1 inch Brake Lever - Raw Aluminum
$211.57

Cycle Standard 2 inch Billet Tapered Handlebar Riser Set
$105.76

Lowbrow Customs Competition Screw-In Gas Cap for Harley-Davidson 1996 & later - Polished
41 reviews $42.30 $51.64

Colony #2748-8 Rear Axle Adjusters Swingarm End Cover Kit 1997-2004 Harley-Davidson Sportster - Zinc Plated
6 reviews $35.20

Cycle Standard Transmission Sprocket .5" Offset - 23 Tooth - 1991-2006 Harley-Davidson XL 1986-2006 Big Twin 5-Speed
$70.34

Cycle Standard Clutch Cable OEM #38666-00 Harley Dyna 2000-2005
$70.32

Lowbrow Customs Bolt On 3/4 inch Ignition Key Switch Bracket for Harley-Davidson Four Speed Transmissions - Tumbled Stainless
13 reviews $26.37

Lowbrow Customs Bolt On 13/16 inch Ignition Key Switch Bracket for Harley-Davidson 4 Speed Transmissions - Tumbled Stainless
9 reviews $26.37

Colony #8155-30 Primary Cover Screw Kit 1936-1964 Harley-Davidson Big Twins - Chrome Plated
3 reviews $30.00

Lowbrow Customs Belt to Chain Conversion Kit Harley-Davidson Dyna 2000-05 Mag Wheels - Black Sprocket
3 reviews $209.99

Lowbrow Customs Belt to Chain Conversion Kit Harley 883 Sportster 2004 & up - Chrome Sprocket
11 reviews $209.99

Prism Supply Co. 22mm Petcock - Brass
4 reviews $104.99

Prism Supply Co. Handlebar 1 inch Grip Collar - Polished Brass
$34.99

Gasbox Drag Pipe Mounting Kit - 1952-81 Harley-Davidson Ironhead Sportster
2 reviews $104.95

Goodridge 30328TC-CL Universal Braided Stainless Brake Line - 28" - Clear Coated
2 reviews $69.95

ODI V-Twin Fusion Alloy Throttle Tube - 1984 & Up H-D Cable Operated
2 reviews $69.95

Gasbox Strong Arm Top Motor Mount 1948-84 Harley Big Twins
7 reviews $69.95

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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