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

Mooneyes Rat Fink Head License Plate Bolts - Green
25 reviews $18.00

Cycle Electric Alternator Kit CE-81AR 1989-1996 Harley-Davidson FLH/FLT/FXR
$575.74 $616.31

Lowbrow Customs Louvered Air Cleaner for S&S Super E / G Carburetors - Chrome
37 reviews $81.78

James Gaskets Complete Motor Gasket Kit - Sportster 1000cc 1972 - 1985
10 reviews $114.43

FNA Custom Cycle FNA Mini Far-E Headlight - Amber Lens
$285.71

FNA Custom Cycle FNA Mini Far-E Headlight - Smoke Lens
1 review $285.71

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

Cycle Standard Round Motorcycle Mirror - Perch Mount - Chrome
25 reviews $38.03

Hawg Supply Watson 4" Air Cleaner S&S Super E/G Carburetor - Brushed Aluminum
$189.99

Hawg Supply Flatty 4" Air Cleaner S&S Super E/G Carburetor - Brushed Aluminum
$189.99

Gasbox Motorcycle Parts Chrome Square Top Sissy Bar - Round Fender - Box Tail Light — Gasbox Chrome Square Top Sissy Bar - Round Fender - Box Tail Light
3 reviews $189.95

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

Drag Specialties AGM Maintenance Free Battery 1986-1996 Harley-Davidson Sportster XL
1 review $113.94

Cycle Standard Rectangular Motorcycle Mirror - Perch Mount - Chrome
18 reviews $37.87

S&S Cycle S&S Super E, B & G Master Carburetor Jet Kit - #11-7272
12 reviews $112.95

No School Choppers 1928 - 1932 Ford Duolamp -Stop Lens- Model A stainless steel Tail Light for your bobber or chopper
43 reviews $56.16

Cycle Standard 22mm Petcock Harley-Davidson Style - Chrome - Left Hand Outlet
30 reviews $40.11

Lowbrow Customs Finned Air Cleaner Cover for S&S Super E/G - Semi Polished
65 reviews $93.48

Parts Unlimited AGM RTX5L-BS Maintenance Free Battery - For Kick Start Motorcycles
11 reviews $50.95

Progressive Suspension Heavy-Duty Fork Springs 1999-2005 Harley-Davidson FXD FXDC FXDL 2004-15 XL Models
3 reviews $139.95

Cycle Standard 6 Post Ignition Key Switch Replaces Harley-Davidson OEM #71501-73A - Chrome Bezel
12 reviews $50.78

Colony #8307 CAD Complete Stock Hardware Kit - 1966-1969 Harley-Davidson Shovelhead - CAD Plated
$279.10

Cycle Electric Generator DGV-5000-LH 12 Volt Low Voltage - 1936-1964 Harley-Davidsons w/Heli Coils
1 review $557.87 $597.17

Cycle Standard Mini Speeder Bullet Style Turn Signals - Chrome
24 reviews $55.78 $76.90

Cycle Standard 41mm Fork Leg Assembly Rebuild Kit 1986-2013 Harley-Davidson FLT/FLHT/FLHX/FLTR 1999-2013 FLHR 1984-2010 FXST 1986-1998 FLST 2000-2017 FLS/FLST 1984-1986 FXWG 1993-2005 FXDWG
2 reviews $79.40

Drag Specialties Gas Tank with Aero-Style Gas Cap - 1995-03 Harley-Davidson Sportster - 3.3 Gallon
$277.67

Cycle Standard Clutch Cable OEM #38621-86A 1986-2003 Harley Sportster 1100 & 1200 XL
20 reviews $32.62

Cycle Electric Alternator Kit CE-84T-12 2011-2113 Harley-Davidson FLH/FLT
1 review $550.12 $588.88

Prism Supply Co. Bristol Breather - CV Carburetor - Tumbled
3 reviews $55.00

S&S Cycle Super E Carburetor Assembly - Black #110-0133
$549.95

Cycle Electric Alternator Kit CE-88T 2012-2017 Harley-Davidson Softail
$548.86 $587.53

Cycle Standard 3 position Universal Quick-Start Ignition Key Switch - Chrome Bezel
10 reviews $42.16

Bare Knuckle Performance 39mm Narrow Glide "The Clinch" Fork Brace - Raw
$274.00

LePera Cherokee Seat - Pleated - 2004-2023 Harley-Davidson Sportsters
1 review $548.00

Cycle Standard Front Motor Mount 1982-94 Harley-Davidson FXR 80-08 FLH FLT
$36.51

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

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

Cycle Standard Brake/Mechanical Clutch Controls Kit - Chrome - 1999-2007 Harley-Davidson FLT/FLHX/FLHT/FLTR/FLHR
$272.41

Cycle Standard Throttle Idle Cable OEM #56309-96 1996-2003 Harley-Davidson Sportster XL
14 reviews $28.67

Cycle Electric Regulator CE-540L for use on 12v Harley-Davidson Generators
22 reviews $181.55 $194.34

Lowbrow Customs Radius Breather Bolts for Harley-Davidson Evo - Brass
35 reviews $49.49

Cycle Electric Alternator Kit CE-81A-97R 1997-1998 Harley-Davidson FLH/FLT/FXR
$543.97 $582.29

Cycle Electric DGV-5000 12V Generator for Harley-Davidson 1965-1984
57 reviews $543.94 $582.26

Cannonball Extended Crossover Shaft For Use With Stealthstarter Electric Starter Kit Rigid Frame 4 Speed Harley-Davidson Big Twins
$90.61

Cycle Electric Alternator Kit CE-24S-04 for 2004-2006 Harley-Davidson 1200 Sportsters
$541.41 $579.56

Hawg Supply Quick-Pull Clutch Cable Bracket V2.0 For Harley-Davidson Ratchet Top 4 Speed Transmissions
1 review $89.99

Gasbox Tall Chopper Bolt On Sissy Bar - 2006-2017 Dyna
21 reviews $134.95

Gasbox Chopper Bolt On Sissy Bar - 1994 - 2003 Sportsters
32 reviews $134.95

Gasbox Hidden Strap Rear Fender Strut - Flat Fender
3 reviews $89.95

Gasbox Big Twin 4 Speed Oil Filter Mounting Bracket
$59.95

Gasbox Tapered Sissy Bar or Strut Rod Machined Ends
31 reviews $29.95

Cycle Standard Chrome Dual Cable Throttle Assembly with Black Grips - 1 inch OEM #56392-77
15 reviews $33.51

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

Wassell Wassell 200 Watt High Output Stator - fits 500/650/750c.c. Triumph / BSA / Norton
19 reviews $178.06

Cycle Standard Clutch Shell With Starter Ring 1970-E1984 Harley-Davidson Big Twins - OEM #37702-70A
$266.91

Cycle Standard Rear Brake Master Cylinder Assembly - Chrome - 2008-2021 Harley-Davidson FLHT/FLHX/FLHR/FLTR/FLTRX/FLTRU/FLTRK
3 reviews $177.84

Cycle Standard 49mm Fork Leg Assembly Rebuild Kit 2006-2017 Harley-Davidson Dyna Glide Models w/8mm and 14mm Damper Bolts
$106.55

Cycle Standard 5-1/2 inch Pullback Handlebar Riser Set - Black
$106.42

Cycle Standard Gas Tank Mounting Kit 1986-2003 Harley Sportster Rubber Mounted Tanks
$27.99

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

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

Cycle Standard Sparto Polished Aluminum Tail Light - 12v
31 reviews $52.83

Cycle Electric Alternator Kit CE-24S-07 for 2007-2008 Harley-Davidson 1200 Sportsters
$527.62 $564.79

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

Gasbox Strong Arm Top Motor Mount for Crank Start Key Switch - 1984-1999 Harley-Davidson Big Twin Evolution
1 review $74.95

British Standard Clutch Hub Center for Triumph Complete With New Rubbers OEM #57-4435
10 reviews $261.77

Cycle Standard Screw-In Harley Stock Style Vented Gas Cap - 1996 & up - Black
64 reviews $22.67

Cycle Standard 22mm Petcock Harley-Davidson Style - Black - Straight Outlet
32 reviews $37.14

Cycle Standard 22mm Petcock Harley-Davidson Style - Chrome - Straight Outlet
19 reviews $39.99

Gasbox Top Motor Mount - 1986 - 2003 Sportster - With Ignition Coil Relocation
26 reviews $39.95

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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