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 Electric Stator CE-8188 for 1981-1988 Harley-Davidson Big Twin Models OEM #29965-81A
4 reviews $102.37 $109.58

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

Goodridge 90 Degree 3/8 inch/10mm Banjo Fitting - Ebony
11 reviews $15.95

Airspeed Cycles Pullback T-Bar Handlebars - 8 inch Rise - 1 inch - Stainless Steel
$255.00

Saddlemen Knuckle Solo Seat - fits 2004-Up Harley-Davidson Sportsters
1 review $255.00

Cycle Standard Mini Electronic Speedometer - 2.4 inch - Black Face
14 reviews $169.84

Cycle Standard Drilled Stainless Steel Brake Rotor - 11.5 inches - Replaces Harley-Davidson OEM #44136-84A, 44136-92
$101.89

Cycle Electric Rectifying Regulator CE-445-02 - 2002-2003 Harley-Davidson FLT/FLH
$254.36 $272.28

FNA Custom Cycle 2-3/4 inch Pancake Headlight - Clear Lens
3 reviews $254.29

Lowbrow Customs Super Four Bar Handlebars - 1 inch - Black
50 reviews From $84.60

Choppahead Aluminum Oil Tank With Finned Ends - Raw Finish - for Harley-Davidson Choppers
4 reviews $253.79

Lowbrow Customs Skateboard Carrier Rack 2006-2017 Harley-Davidson Dyna
2 reviews $168.66

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

S&S Cycle Precision Hydraulic Tappet Set 2000-Up Harley-Davidson XL 2017-Up M8 1999-17 Twin Cam
$251.96 $279.95

Goodridge 35 Degree 3/8 inch/10mm Banjo Fitting - Stainless Steel
8 reviews $17.95

Cycle Standard Custom Flush Mount Aluminum Pop-Up Gas Cap and Weld In Bung
27 reviews $100.41

Lowbrow Customs Clutch / Brake Cable Clamp - Black - for 1-1/4 inch Frame Tubing
24 reviews $20.04

Cycle Electric Rectifying Regulator CE-210 - 2004-2006 Harley-Davidson XL Models
1 review $166.85 $178.60

Mullins Chain Drive 35mm Super Narrow Triple Trees Set
4 reviews $500.00

Prism Supply Co. Sling Shot Hydraulic Brake Pedal Kit - Harley-Davidson Cone Engine - Stainless Steel
$249.99

Gasbox XLR Drag Pipe Set fits 1957 - 1980 (except 1979) Harley-Davidson Sportster XL XLH XLCH XLR ModelsLR Models - Chrome OEM #65487-59
5 reviews $249.99

Prism Supply Co. Prism Supply Co. PS-41 Tail Light - Polished
$124.99

Sully's Customs Diamond Pattern Solo Seat - Black
8 reviews $124.99

Gremlin Wiring The Sportster Treatment Custom Wiring Harness Kit 1994-1996 Harley-Davidson Sportster Models
15 reviews $249.95

Old-Stf Cycle Shovelhead Rocker Box Split Oil Lines - Stainless & Black
$99.95

Cycle Standard Clutch Cable OEM #38620-96 Harley Sportster XLH 1200 1996-2003 +4 inch Extended
6 reviews $61.94

Cycle Electric Rectifying Regulator CE-204L - 1984-1988 Harley-Davidson FLST/FXST With Battery in Oil Tank
$164.51 $176.10

Cycle Electric Rectifying Regulator CE-204 - 1981-1988 Harley-Davidson FX FL
9 reviews $164.51 $176.10

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

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

Cycle Standard Choke Knob Enricher for Harley-Davidson S&S Super E and G Carburetors - Chrome
60 reviews $54.66

Lowbrow Customs Louvered Air Cleaner for Harley CV / EFI 1991-2020 - Black
51 reviews $81.78

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

Kustom Tech Deluxe 1" Handlebar Risers - Chromed Brass
3 reviews $243.91

Fork Co., Ltd British Wide and Narrow Handlebars - Stainless Steel
$243.89

Lowbrow Customs Tsunami Fender - Raw Aluminum - 1994 - 2003 Sportsters
22 reviews $243.81

Kustom Tech DeLuxe 1 inch Brake Lever Polished Aluminum
$242.90

Cycle Standard Isolator Mount - Front - 2004-2021 Harley-Davidson Sportster XL
2 reviews $30.25

British Standard Classic 60's Side Cover Set for OIF Triumphs 1971 - 1982
31 reviews $161.03

Cycle Standard 3/8 inch Braided Stainless Fuel Line - 6 ft.
5 reviews $69.00

Led Sled Customs 7 inch Flat Top Fender for 16 inch Stock Style Dunlop Tires
7 reviews $160.00

Led Sled Customs 6 inch Flat Top Fender for 16 inch Vintage Style Tires
13 reviews $160.00

Sully's Customs Sporty Solo - Black Diamond - 1982-2003 Harley-Davidson Sportsters
43 reviews $159.99

Sully's Customs Sporty Solo - Black Horizontal Pleated - 1982-2003 Harley-Davidson Sportsters
21 reviews $159.99

Prism Supply Co. Prism Supply Co. PS-41 Tail Light - Brushed Aluminum
1 review $119.99

Gasbox Top Motor Mount - 1986-2003 Sportster - Stainless Steel - With Ignition Coil Relocation
11 reviews $39.95

Bates BattBoy 65 Battery Box 1965-84 Harley-Davidson FL FLH and 1967-78 XL
9 reviews $119.81

Cycle Electric Alternator Kit CE-61AR for 1980-1988 Harley-Davidson FLH/FLT/FXR With 5 Speed Rubber Mount Motors
1 review $476.96 $510.57

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

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

Prism Supply Co. Jockey Shifter - Long - Harley-Davidson Big Twin
4 reviews $94.99

Cycle Standard Chrome Kickstand - 1 inch Extended - 1954-e1984 Harley-Davidson Sportster XL
$94.44

Wassell 930 Right Side 30mm Concentric Carburetor Triumph BSA Norton
3 reviews $235.94

Kustom Tech DeLuxe Stainless Steel Cable Register for KustomTech Clutch and Brake Levers
5 reviews $67.37

Airspeed Cycles T-Bar Handlebars - 8 inch Rise - 1 inch - Stainless Steel
$235.00

S&S Cycle Replacement 4 Speed Kicker Cover Kit - Aluminum
3 reviews $234.69 $255.95

Lowbrow Customs 60 PSI Harley Oil Pressure Gauge - Black Face
39 reviews $46.85

Cycle Standard Tombstone LED Taillight w/ Amber Turn Signals - Red Lens - Chrome
4 reviews $93.69

Cycle Standard Stock Style Chrome Kicker Lever - 1936 - 1977 Harley Big Twin and 1957 - 1976 XL
5 reviews $52.05

Cycle Standard 11" Black Shocks With Black Spring - 1 inch Under - 1973-1984 Harley-Davidson FX/FXE 1972-1984 FL
$233.91

S&S Cycle Super E T-Style O-Ring Manifold 1955-65 Harley-Davidson Big Twin
$116.84 $122.95

Cycle Standard Bullet Turn Signal - Amber Lens - Chrome
22 reviews $30.97

Lowbrow Customs 39mm Low Profile Fork Caps - Aluminum

7 $58.02

Cannonball Lion Battery Box for Li-Ion Batteries 1936-1964 Harley-Davidson OHV Big Twin 1937-1948 SV Big Twin
$463.52

Drag Specialties Ape Hanger/Narrow TBW Handlebars - 1 inch - 12 inch Rise - Chrome
$153.69

Cycle Standard 41MM Chrome Fork Tubes 1984-1999 Harley-Davidson FXWG/D FXST - 34-1/4 inch - 10 Over
1 review $229.45

Cycle Standard Smooth Stainless Steel Hidden/Internal Stop Fork Neck Cup Kit 1949-1987 Harley-Davidson Big Twins
2 reviews $114.71

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

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

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

Mid-USA Hardbody Handlebar Riser Adapter Kit for Springers - Black
1 review $91.13

Burly Brand Complete Handlebar Cable/Brake Line Kit for 12" Ape Hanger Handlebars 2007-2013 Harley-Davidson Sportsters
3 reviews $227.66 $252.95

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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