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

Cycle Standard Forward Control Kit 1991-2003 Harley-Davidson Sportsters - Chrome - OEM #33891-98
19 reviews $268.09 $324.09

Cycle Electric Generator DGV-5000-BLK 12 Volt - 1965-1984 Harley-Davidson - Blacked Out
2 reviews $535.58 $573.32

Lowbrow Customs Domed Screw-In Gas Cap for Harley-Davidson 1996 & later - Brass
23 reviews $89.06

Lowbrow Customs Fork Neck Cup Conversion Kit 7/8" to 1" Stem 1952-1981 Harley-Davidson Ironhead Sportster
$97.00

Drag Specialties Complete Advance Unit Assembly 1970-1999 Harley Davidson Big Twin 1971-2003 XL Points Ignition (Except Single Fire Ignition)
6 reviews $44.45

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

Cycle Craft Carburetor Rebuild Kit 1988-2006 Harley-Davidson CV Carbs
12 reviews $25.70

Haifley Seats Cobra Seat - Black Pleated - 2004-2021 (Excl. 2007-09) Harley-Davidson Sportsters
1 review $350.00

Airspeed Cycles Narrow Bottom Ape Hanger Handlebars - 11 inch Rise - 1 inch - Stainless Steel
$175.00

Sully's Customs Sporty 2-up - Black Horizontal Pleated - 1982-2003 Harley-Davidson Sportsters
48 reviews $209.99

Cycle Electric Alternator Kit CE-84T-06R 2006 Harley-Davidson FLH/FLT
$524.25 $561.19

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

Cycle Standard Chrome Kickstand Kit - Stock Length - 1966-1986 Harley-Davidson FL FX
15 reviews $116.39

Lowbrow Customs Belt to Chain Conversion Kit Harley-Davidson Dyna 1994-99 - Chrome Sprocket
2 reviews $207.99

Fast Eddy Co. No. 12 Float Bowl Drain Valve for S&S Super E / G / B Carburetors
32 reviews $44.95

Lowbrow Customs 39mm Tapered Fork Lowers - Black
$344.06

Lowbrow Customs Pursuit Grip Set - Brass
47 reviews $171.85

Cycle Standard 5 Stud Clutch Hub Assembly - Harley-Davidson Big Twins 1941-1984 OEM #37550-41B
6 reviews $114.25

Cycle Standard Screw-In Harley Stock Style Vented Gas Cap - 1996 & up - Chrome
38 reviews $29.28

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

Cycle Standard Drilled Stainless Steel Brake Rotor - 11.5 inches - Replaces Harley-Davidson OEM #44156-00
4 reviews $101.89

Coker Tire Firestone Deluxe Champion Motorcycle Tire 4.00-19
5 reviews $169.58

Mooneyes Finned Points Cover for Harley-Davidson Big Twins
37 reviews $67.67

Cycle Standard Chrome Single Cable Chopper Throttle Assembly - 1 inch
31 reviews $28.94

Lowbrow Customs Springer Top Clamp for Standard 3.5" Handlebar Risers
3 reviews $202.45

Cycle Standard Sportster Style Frisco Mount Gas Tank - Standard Width - 2.5 gallon
4 reviews $202.19

Kustom Tech Deluxe Throttle Housing Polished Aluminum for 1 inch bars
7 reviews $144.03

Biltwell Single Cable Cast Whiskey Throttle - Black - 1 inch
31 reviews $99.95

PanAm Oils Inc. Oil/Ignition Shut-Off Valve Pre-2000 Harley-Davidson
1 review $249.49

Lowbrow Customs Four Piston Brake Caliper - Polished Aluminum
$249.00

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

Gasbox Upswept Shotgun Exhaust Pipe Set for 1970-1984 Harley-Davidson Shovelhead Rigid Applications
1 review $329.95

Lowbrow Customs Rigid Shock Struts for Harley-Davidson Motorcycles
13 reviews $140.58

James Gaskets Primary Cover Gasket & Seal Kit - 1991-2003 Harley-Davidson Sportster
2 reviews $30.70

Mooneyes 60 psi Oil Pressure Gauge
36 reviews $49.00

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

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

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

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

Cooper Smithing Co. Replacement Springer Fork Legs - Stock Length - 1940-Up Harley-Davidson
$325.00

Cycle Standard 6 inch Wide Flat Trailer Fender with Bobbed End - Steel
9 reviews $162.41

Drag Specialties Hydraulic Brake Light Switch 1984-99 Harley-Davidson FLST/FX/FXST/FXR 79-85 XL 91-98 Dyna 71-84 FX 80-98 FLT 82-83 FXR
9 reviews $21.35

Led Sled Customs 7 inch Contour Fender for 16 inch Stock Style Dunlop Tires
36 reviews $160.00

Shinko Motorcycle Tires Classic 240 Front Motorcycle Tire - 100/90-19 63H
7 reviews $119.99

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

Lowbrow Customs Brake Caliper Anchor Rod - 6 inch - Black
14 reviews $63.81

LePera Cobra Solo Seat - Smooth - Rigid Frame
3 reviews $318.00

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

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

Gasbox Chrome Pointed Sissy Bar - Flat Fender - Box Tail Light
$189.95

Prism Supply Co. 1/4 inch NPT Petcock - Brass
9 reviews $94.95

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

Cycle Standard Nose Cone Cam Gear Cover - Chrome - 1973-92 Harley-Davidson Big Twin
2 reviews $189.33

Lowbrow Customs 39mm Narrow Glide Fork Brace - Standard Width
3 reviews $157.46

Gasbox Tall Chopper Bolt On Sissy Bar With Cross Bracket - 2004 & Up Sportsters
$134.95

Cycle Standard Z Bar Handlebars - 1 inch - 4 inch Rise - Chrome
20 reviews From $104.39

Kustom Tech DeLuxe 1 inch Master Cylinder Polished Aluminum
9 reviews $470.03

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

Lowbrow Customs Frisco Mount Sportster Gas Tank - Super Narrow - 1.6 gallon
37 reviews $231.99

Performance Machine 1 inch Contour Billet Brake Master Cylinder 9/16" Bore - Chrome
$461.95

V-Twin Manufacturing Mid Brake Control Kit 1979-1982 Harley-Davidson FX/FXE
$145.94 $208.49

Cycle Standard Drilled Stainless Steel Brake Rotor - 11.5 inches - Replaces Harley-Davidson OEM #41791-79A
2 reviews $101.89

Cycle Standard Drilled Stainless Steel Brake Rotor - 11.5 inches - Replaces Harley-Davidson OEM #41797-00
1 review $101.89

Cycle Electric Alternator Kit CE-62AR for 1991-1998 Harley-Davidson Dyna 1984-1999 Softail Models
$457.86 $490.13

Burly Brand Complete Handlebar Cable/Brake Line Kit for 16" Ape Hanger Handlebars 1997-2003 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

JRC Engineering JRC Triumph BSA Norton 12v Premium Sealed AGM Motorcycle Battery
43 reviews $113.76

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

Gasbox Chrome Shorty Grab Bar - Flat Fender
6 reviews $129.95

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

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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