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

EMGO Triumph 650 c.c. 1963 - 1972 Complete Engine Gasket Kit
39 reviews $116.16

Cycle Standard Throttle Cable OEM #56308-96 1996-2003 Harley-Davidson Sportster XL
15 reviews $27.71

Andrews EV27 Camshaft - 1984-1999 Harley-Davidson Big Twin
$230.61 $251.95

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

Unity Manufacturing Rear Brake Caliper Bracket for Swingarm Harleys - 11.5" Rotor - 3/4" Axle - Raw
$115.00

Sully's Customs Camel Back Seat - Diamond Pattern - 1982-2003 Harley Sportsters
13 reviews $229.99

Lowbrow Customs 39mm Tapered Fork Lowers - Black
$344.06

Lowbrow Customs Pursuit Shifter Peg for Harleys - Solid Brass
41 reviews $57.31

Goodridge 35 Degree 3/8 inch/10mm Banjo Fitting - Ebony
8 reviews $15.95

Lowbrow Customs DIY Motorcycle Fender Strut Mounting Kit for Custom Chopper & Bobber
87 reviews $62.33

Burly Brand Complete Handlebar Cable/Brake Line Kit for 12" Ape Hanger Handlebars 2004-2006 Harley-Davidson Sportsters
$227.66 $252.95

Burly Brand Complete Handlebar Cable/Brake Line Kit for 12" Ape Hanger Handlebars 1997-2003 Harley-Davidson Sportsters
$227.66 $252.95

Lowbrow Customs Spark Plug Wire Set For Use With Gasbox 1986-2003 Sportster Top Motor Mounts with Coil Relocation
1 review $25.29

Lowbrow Customs Belt to Chain Conversion Kit Harley 883 Sportster 1995-2003 - Black Sprocket
29 reviews $167.41

Andrews A2 Camshaft - L1977-1984 Harley-Davidson Shovelhead
2 reviews $226.76 $251.95

Lowbrow Customs Finned 1" Handlebar Risers - Aluminum
15 reviews $112.47

EK Chains 530 ZVX3 Sealed Extreme Series X-Ring Chain - 150 Links - Black
1 review $334.75 $359.95

Dynatek Performance Electronics 2000I PC Programmable Electronic Ignition Kit for Harley-Davidsons
9 reviews $330.71

Cycle Standard Wagner Lockheed Type Rear Drum Brake Master Cylinder - Chrome - 1958-1972 Harley-Davidson FL 1971-1972 FX
$110.07

Cycle Standard Complete Rear Rubber Motor Mount Kit 2004-13 Harley-Davidson Sportsters
$164.86

Cycle Standard Front Fender - Chrome - Harley-Davidson 1973-up XL FX FXR 35mm 39mm Narrow Glide Front Forks - OEM #59031-83
19 reviews $109.90

Cycle Electric Stator CE-8999 for 1989-1999 Harley-Davidson Evo Big Twins with 32 amp Alternator
27 reviews $109.29 $116.99

Mid-USA Hardbody Handlebar Riser Adapter Kit for Springers - Chrome
2 reviews $109.15

Shinko Motorcycle Tires SR777 Front Motorcycle Tire - 90/90-21
2 reviews $108.99

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

Cycle Standard Custom Flush Mount Polished Stainless Steel Pop-Up Gas Cap and Weld In Bung
10 reviews $108.43

Lowbrow Customs Rear Caliper Bracket for Rigid Models with 11-1/2 inch Rotors - 1" Axle - Raw
2 reviews $108.34

Lowbrow Customs Rear Caliper Bracket for Rigid Models with 11-1/2 inch Rotors - 3/4" Axle - Black
7 reviews $108.34

Mooneyes 3 quart Traditional Chopper Oil Tank for Harley-Davidson Choppers
9 reviews $325.00

Arlen Ness Big Sucker Stage 1 Air Filter Kit - Chrome - 1999-2017 Harley-Davidson Twin Cam
3 reviews $215.96 $239.95

Led Sled Customs Stainless Steel Universal Kickstand with Internal Spring - for 1 inch tubing
4 reviews $161.43

Gasbox Upswept Exhaust Pipe Set 1948-1957 Harley-Davidson Rigid Panhead - Chrome
5 reviews $214.95

Gasbox S&S Carburetor Support Bracket - 1985-1999 Harley-Davidson Evolution Big Twin
27 reviews $27.99

Drag Specialties Steel Clutch Plate Kit - 1968 - 1984 Shovelhead
12 reviews $40.23

Bates Bates Kill Bill Motorcycle Battery Disconnect Switch - Brass Knob
35 reviews $33.74

Lowbrow Customs Premium 39mm Chrome Fork Seal Covers - Chrome - Harley-Davidson OEM #46002-87
3 reviews $42.45

LePera Bare Bones Solo Seat - Smooth - fits 1984-1999 Harley-Davidson Softail
1 review $318.00

Lowbrow Customs Belt to Chain Conversion Kit Harley Davidson Dyna Twin Cam 2006-2017 - Black Sprocket
15 reviews $219.06

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

Lowbrow Customs Belt to Chain Conversion Kit Harley 883 Sportster 2004 & up - Black Sprocket
24 reviews $205.78

Prism Supply Co. Jockey Shifter for Harley-Davidson Big Twin - Short Arm
6 reviews $89.99

Gasbox The Traveler DIY Sissy Bar Kit
7 reviews $89.95

Gasbox Axle Mount License Plate Bracket - Vertical - Left Side Mount - 3/4 Inch Axles
15 reviews $69.95

Cycle Standard Clutch Cable OEM #38619-86A 1986-2003 Harley-Davidson 883 Sportster XL
18 reviews $44.86

Lowbrow Customs Ovate Axed Gas Tank - Super Narrow - 1.6 gallon
10 reviews $207.84

Lowbrow Customs Stingray Ribbed Steel Fender 6 inch Width
70 reviews $207.08

Shinko Motorcycle Tires Classic 240 Whitewall Front/Rear Motorcycle Tire - MT90-16 74H
$153.95

Lowbrow Customs Belt to Chain Conversion Kit Harley-Davidson Dyna 1994-99 - Black Sprocket
11 reviews $195.44

Cycle Standard Drilled Stainless Steel Brake Rotor - 11.5 inches - Rear - Replaces Harley-Davidson OEM #41789-92
$102.14

Colony #8603-8 Adjustable Pushrod & Solid Lifter Kit 1984-Up Harley-Davidson Evo
2 reviews $102.11

Cycle Standard Mini Ape Hanger Handlebars - 1 inch - 9 inch Rise - Chrome
40 reviews From $121.93

Cycle Standard 8 inch Black Mini Apes Handlebars for Harley-Davidson
29 reviews From $121.96

Lowbrow Customs Drag Bar Handlebars - 1 inch - Chrome
12 reviews From $55.13

Lowbrow Customs Reproduction Harley Model 125 / Model 165 / Hummer Gas Tank - With Key Switch
8 reviews $303.11

Cycle Standard Z Bar Handlebars - 1 inch - 6 inch Rise - Black
40 reviews From $85.73 $104.63

Lowbrow Customs Pursuit Grip Set - Black
22 reviews $75.67 $103.39

Cycle Standard Axed Dual Cap Chopper Gas Tank - 2.2 Gallon
30 reviews $201.62

Cycle Electric Alternator Kit CE-94T-15 90 Series 56 Amp 2014-2016 Harley-Davidson FLH/FLT - Water Cooled
1 review $599.97 $642.25

Cycle Standard Clutch Plate Kit 1968-1984 Harley-Davidson Big Twins
$85.71

Mullins Chain Drive Richmond Spool Hub - Polished
1 review $299.95

Lowbrow Customs Shotgun Exhaust Pipes 2004-2021 Harley-Davidson Sportster XL - Raw Steel
3 reviews $299.93

Gasbox Top Motor Mount - 1986-2003 Sportster - Stainless Steel - With Coil and Stock Ignition Switch Mounts
8 reviews $49.95

Amal Carburetor Concentric 928 930 932 Carburetor Rebuild Kit 622/238 Triumph BSA
21 reviews $33.30

Lowbrow Customs Super Banana Gas Tank - Mid Tunnel - 2.6 Gallon
19 reviews $199.67

Cycle Electric Alternator Kit CE-94T-14 90 Series 56 Amp 2014-2016 Harley-Davidson FLH/FLT - Air Cooled
$593.97 $635.83

V-Twin Manufacturing Chrome Kickstand - 1952-1979 Harley-Davidson Ironhead Sportster XL Models
5 reviews $98.51

LePera Le Pera Signature II Solo Seat fits Rigid Frame
4 reviews $295.00

V-Factor Motorcycle Parts 18 Spoke Stainless Steel Brake Rotor - 11.5 inches - Rear - Replaces Harley-Davidson OEM #41789-92/41797-00
$65.40

Cycle Electric Alternator Kit CE-94T-12 90 Series 56 Amp 2011-2013 Harley-Davidson FLH/FLT
$586.80 $628.15

Cycle Standard Tail Light Assembly for 1973-1999 Harley-Davidsons - Replaces OEM #68008-73A
13 reviews $65.15

Drag Specialties Scorpion Solo Seat - Rigid Frame
$292.95

Lowbrow Customs Deluxe Choke Knob Enricher for Harley-Davidson S&S Super E and G Carburetors - Chrome
45 reviews $48.61

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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