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 Foot Peg Chrome Clevis Mounts
22 reviews $30.33

Andrews N4 Camshafts - 2000-Up Harley-Davidson Sportster XL 2000-02 Buell
$454.46 $504.95

Andrews N2 Camshafts - 1991-1999 Harley-Davidson Sportster XL 1994-99 Buell
$454.46 $504.95

Cycle Standard Round Motorcycle Mirror - Perch Mount - Black with Retro Blue Glass
76 reviews $37.87

Cycle Electric Alternator Kit CE-67TR 1999-2003 Harley-Davidson FXD Dyna - Upgrade to 3 Phase
$451.28 $483.08

Airspeed Cycles Wide Bottom Springer 6 Bend Handlebars - 8 inch Rise - 1 inch - Stainless Steel
1 review $225.00

Airspeed Cycles Narrow Bottom 6 Bend Handlebars - 8 inch Rise - 1 inch - Stainless Steel
$225.00

Prism Supply Co. Sportster Jockey Shift Kit - 1991-2003 Harley-Davidson Sportster
1 review $224.99

Cooper Smithing Co. Ribbed Handmade Steel Fender - for 16 inch Tires
12 reviews $224.95

Cooper Smithing Co. Ribbed Handmade Steel Fender - for 18 inch Tires
8 reviews $224.95

Lowbrow Customs Domed Steel Motorcycle Oil Tank for H-D Sportster Big Twin and Universal Choppers
23 reviews $224.94

Lowbrow Customs Dimpled Steel Motorcycle Oil Tank for Triumph Choppers
30 reviews $224.94

Biltwell Slimline Risers - Black Stainless Steel - 1 inch
24 reviews $149.95

Gasbox Primary Mount License Plate Bracket - 1967 - 2003 Sportsters
19 reviews $49.95

Gasbox 1986 - 2003 Sportster Frisco Style Gas Tank Lift Kit
20 reviews $49.95

Kustom Tech Choke Knob Enricher / Enrichment Device Brass Acorn Style for Harley-Davidson S&S Super E / G Carbs
21 reviews $74.67

Red Fox Enterprises Glass License Plate Round Reflector - Red
13 reviews $14.00

Goodridge Universal Braided Stainless Brake Line - 21" - Ebony
4 reviews $31.95

Lowbrow Customs Radius Breather Bolts for Harley-Davidson Evo - Black ED
51 reviews $49.49

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

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

Lowbrow Customs 8 Piece Aluminum Wheel Axle Spacer Kit - 1.125 inch O.D. x 3/4 inch I.D.
3 reviews $34.03

EMGO Cocktail Shaker Mufflers - Upswept - Right Side Pair - for 1-1/2 to 1-3/4 inch Exhaust Pipes
12 reviews $221.02

Wassell Vape Electronic Ignition Triumph BSA Norton
5 reviews $220.15

Cycle Standard Prime 1 inch Handlebar Switch Kit - Dual Mini Switch - Chrome
6 reviews $109.98

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

Cycle Standard 3/8 inch NPT Petcock 90 Degree Outlet
19 reviews $39.93

Drag Specialties Replacement Starter - 1990-2006 Harley-Davidson Big Twin/Twin Cam - Black
1 review $438.79

Cycle Standard CV Carburetor Vacuum Piston Replaces Harley-Davidson OEM #27585-88
5 reviews $39.86

Lowbrow Customs Pursuit Foot Peg Set - Raw Aluminum
18 reviews $108.93

Monster Craftsman Clamp on Tensioner 530 Sprocket - 1 inch Tubing
2 reviews $145.00

Lowbrow Customs Primary Mount 13/16 inch Ignition Key Switch Bracket for Harley-Davidson Sportster 1991-2003
40 reviews $27.17

Drag Specialties High Rear Scorpion Seat Pad
$216.95

LePera Cobra Seat - Smooth - fits 1984-1999 Harley-Davidson Softail
1 review $433.00

Boyer Bransden Electronic Ignition for Triumph and BSA Motorcycles 500 / 650 / 750 c.c.- Kit 00052
21 reviews $216.43

American Prime Mfg. Cast Alternator Shroud Cover for Open Belt Drives fits 1970-2006 Harley-Davidson Big Twins - Polished
$72.09

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

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

James Gaskets Top End Gasket Kit 1966-1984 Harley-Davidson Shovelhead
$71.99

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

Lowbrow Customs Pursuit Grip Set - Raw Aluminum
24 reviews $107.67

Cycle Standard Choke Knob Enricher for Harley-Davidson S&S Super E and G Carburetors - Brass
8 reviews $53.64

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

Performance Machine Performance Machine Classic 4 Piston Brake Caliper - Chrome
2 reviews $426.95

Cycle Standard 41MM Chrome Fork Tubes 1977-1984 Harley-Davidson FL/FLH - 28-7/8 inch - 8 Over
$212.89

Lowbrow Customs T-Bars Handlebars - 8 inch Rise - 1" Diameter - Black
11 reviews From $141.73

Kustom Tech Classic 1 inch Master Cylinder - Raw Aluminum
2 reviews $424.31

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

Cycle Standard 39mm Fork Leg Assembly Rebuild Kit 1988-2022 Harley-Davidson XL 1991-1998 FXD 1987-2000 FXR
$84.74

V-Twin Manufacturing Foot Clutch Release Arm 1936-1964 Harley-Davidson Big Twin OEM# 3705136
$42.35

Colony #1004 Complete Show Bike Kit Allen Hardware Harley-Davidson 1992-1999 Softail - Chrome Plated
$211.75

Cycle Standard Motorcycle Tire Inner Tube - 5.00 / 5.10-16 inch Center Metal Valve
11 reviews $32.33

Prism Supply Co. Bristol Breather - S&S Super E/G Carburetor - Polished
$60.00

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

Sully's Customs Sporty 2-up - Black Diamond - 1982-2003 Harley-Davidson Sportsters
31 reviews $209.99

Gasbox Big Twin CV Carburetor Support Bracket - 1985-1999 Harley-Davidson Evolution Big Twin
30 reviews $27.99

Hugh's Handbuilt HHB Harley Davidson Sprocket Lock System - Raw Silver (Tumbled Finish)
1 review $69.89

Kustom Tech Deluxe Polished and Brass Wire / Cable Operated Master Cylinder With Reservoir
3 reviews $416.80

Cycle Standard Fat Bob Rear Fender - 1994 - 2003 Harley Davidson Sportster XL Models
17 reviews $206.48

Lowbrow Customs Deluxe Choke Knob Enricher for Harley-Davidson S&S Super E and G Carburetors - Brass
75 reviews $51.54

Cycle Standard Round Motorcycle Mirror - Clamp On - Chrome
8 reviews $41.20

Cycle Electric Generator DGV-2569 65A 12v for 1936-1984 Harley-Davidsons
13 reviews $408.86 $437.67

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

Cycle Electric Stator CE-0732 for 2007-2013 Harley-Davidson Sportsters OEM# 29997-07
$135.76 $145.32

James Gaskets Motor Gasket Kit W/Alum-Foamet Base 1948-1965 Harley-Davidson Panhead
$101.74

Lowbrow Customs KR Style Bolt-On Hardtail Rear Frame Section for 1967-1978 Harley-Davidson Ironhead Sportster
34 reviews $405.59

Cycle Standard 5 Post Ignition Key Switch Replaces Harley-Davidson OEM #71500-36T - Chrome Bezel
7 reviews $50.55

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

Lowbrow Customs Flying Monkey Grips - Black and White Stripes - 1 inch
106 reviews $33.44

Cycle Standard 22mm Petcock Harley-Davidson Style - Black - Right Hand Outlet
13 reviews $26.73 $36.84

Cycle Standard Fishtail Exhaust 30 inch Extension Set
23 reviews $200.01

Led Sled Customs Derby Oil Tank for Harley-Davidson Choppers
5 reviews $199.95

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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