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 Original P-Nut Tank Deep Tunnel Gas Tank 1.8 gallon
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Timken Neck Post Bearing & Race Set - Made in USA
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Cycle Standard Wassell Peanut Gas Tank - 2 Gallon - Deep Tunnel - Dual 1/4" NPT
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Cycle Standard Smooth Stainless Steel Hidden/Internal Stop Fork Neck Cup Kit 1949-1987 Harley-Davidson Big Twins
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Prism Supply Co. Sportster Mid-Control Kit for 1991-2003 Harley-Davidson - Stainless Steel
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Lowbrow Customs Straton Springer Front End - 22" Length (4" Over) - Chrome
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Morris Magneto Morris M-5 Magneto for Harley Davidson Big Twin 1974-1992 – Brushed Finish
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LePera Signature II Two Piece 2-Up Seat - Rigid Frame
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Haifley Seats King And Queen Seat - Black Diamond - 2004-2021 (Excl. 2007-09) Harley-Davidson Sportsters
$465.00

Lowbrow Customs Complete Solid Motor Mount Kit for 2004 - Up Harley-Davidson Sportster XL
23 reviews $153.52

Lowbrow Customs Radius Breather Bolts for Harley-Davidson Evo - Chrome Plated
101 reviews $49.49

Dynatek Performance Electronics Dyna S Ignition Complete Kit - Dual Fire for Harley Davidson
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Lowbrow Customs Straton Springer Front End - 24" Length (6" Over) - Black
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American Prime Mfg. Brake/Mechanical Clutch Control Kit for 1 inch Handlebars - 11/16 inch Bore - Polished
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Cycle Standard Stock Style Harley Sportster Gas Tank 1986 - 2003 - Left Side Petcock - 2.2 gallon
72 reviews $218.85

Cycle Standard Motorcycle Tire Inner Tube - 2.75 / 3.00-21 inch Center Metal Valve
29 reviews $24.28

Cycle Electric CE-84T-99 Stator Rotor and Regulator Kit for 1999 - 2003 Harley-Davidson FLH and FLT Models
21 reviews $545.16 $583.57

Bates Baja 90 Tire 19" - 100/90-19 57T
20 reviews $196.74

Cycle Electric Stator CE-8012 for 2006 - 2016 Harley-Davidson FLH and FLT Models
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Cycle Electric CE-8010-08 Stator Replacement for 2008-2017 Harley Dyna & Softail OEM #30017-08
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Airspeed Cycles T-Bar Handlebars - 12 inch Rise - 1 inch - Stainless Steel
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Airspeed Cycles Narrow Bottom Ape Hanger Handlebars - 11 inch Rise - 1 inch - Stainless Steel
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Gasbox Bolt-On Horseshoe Oil Tank for 1965-Up Harley Four-Speed Swingarm Frames
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Cycle Standard 39MM Chrome Fork Tubes - 27 inch - 2 Over
2 reviews $209.58

Cycle Standard Bayonet / Cam Harley Style Vented 2" Gas Cap - Chrome
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Gremlin Wiring The Sportster Treatment Custom Wiring Harness Kit 2004-2006 Harley-Davidson Sportster Models
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Lowbrow Customs Belt To Chain Conversion Kit 1984-1994 Harley-Davidson Softail - Chrome Sprocket
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Lowbrow Customs Super Four Bar Handlebars - 1 inch - Chrome
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Cycle Standard Smooth Radius Steel Fender 5-1/2 inch Fender
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British Standard Triumph 650 to 750 c.c Big Bore Kit for 1963-1972 Models
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Biltwell Single Cable Cast Whiskey Throttle - Black - 1 inch
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Lowbrow Customs Weld-On Upper Fender Mount Tab for Curved and Ribbed Motorcycle Fenders
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Prism Supply Co. 1/4 inch NPT 90 Degree Petcock - Stainless Steel
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Mid-USA 21 x 2.15 Black Front Spool Wheel
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Lowbrow Customs Pursuit Grip Set - Brass
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Cycle Standard 39MM Chrome Fork Tubes - 35 inch - 10 Over
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Kustom Tech Internal Throttle Kit - Right Side 1 inch
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Haifley Seats King And Queen Seat - Black Pleated - 2004-2021 (Excl. 2007-09) Harley-Davidson Sportsters
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Lowbrow Customs Rabbit Ears Handlebars - 1 inch - Chrome
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Cycle Standard 35MM Chrome Fork Tubes - 29-1/4 inch - 6 Over
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American Prime Mfg. Brake/Mechanical Clutch Control Kit for 1 inch Handlebars - 9/16 inch Bore - Black
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Lowbrow Customs 16 Piece Aluminum Wheel Axle Spacer Kit - 1.125 inch O.D. x 3/4 inch I.D.
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Drag Specialties 530 O-Ring Drive Chain - 130 Links includes Master Link
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Cycle Standard Harley-Davidson Ironhead Sportster Gas Tank 1958 - 1978 Replica Stock Style - 2.4 gallon
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Lowbrow Customs Shotgun Exhaust Pipes 1990-2003 Harley-Davidson Sportster XL - Raw Steel
5 reviews $299.93

Gasbox Reno Full Rigid Chopper Frame 1936-1999 Harley-Davidson Big Twin 5 Speed - 2" Up - Frisco Tank Mounts - Horseshoe Oil Tank
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Gasbox Full Rigid Chopper Frame 1936-1999 Harley-Davidson Big Twin 4 Speed - 3" Up - Sporty Tank Mounts - Horseshoe Oil Tank
$1,799.00

Kustom Tech DeLuxe 1 inch Master Cylinder Polished Aluminum & Brass
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Antigravity Batteries Antigravity Lithium Small Case Battery - 8 Cell - AG-801
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Trader Cody's Choppers Midway Mid Controls 1970-1984 Harley-Davidson Shovelhead 1984-1999 Evo - Black
$355.00

Bar-None Moto BNM Bolt On Sissy Bar For Rogue Fender - 1958-1984 Harley-Davidson Panhead/Shovelhead
5 reviews $293.54

Kustom Tech DeLuxe 1 inch Clutch Lever Polished Aluminum & Brass
15 reviews $248.66

Cannonball Springbrake Disc Brake Kit for I-Beam And Classic Springer Forks - 1978-1999 Narrow Dual Flange Front Hub
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Gasbox Dog Dish Air Cleaner - Harley CV / EFI 1991-2019
28 reviews $99.95

Lowbrow Customs Forward Control Kit 1991-2003 Harley-Davidson Sportsters - Black Anodized
$282.49

Belt Drives LTD. BDL 8mm 1.5" Primary Belt Drive – Electric Start – 1965-1978 Harley Shovelhead
$845.50 $890.00

Shinko Motorcycle Tires Super Classic 270 Front/Rear Motorcycle Tire - 4.00-18 64H
3 reviews $153.34

Drag Specialties 5 ohm Dual Fire Coil - for Points Ignition
16 reviews $80.20

Lowbrow Customs Forward Control Kit 2004-2013 Harley-Davidson Sportsters - Black Anodized
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Gasbox Hi Lo Shotgun Exhaust Pipe Set 1970-1984 Harley-Davidson Shovelhead
9 reviews $279.99

Lowbrow Customs Manta Ray Smooth Steel Fender 7 inch Width
21 reviews $209.53

Lowbrow Customs 39mm Solid Handlebar Riser Bushings for Harley-Davidson - Aluminum
35 reviews $36.98

Lowbrow Customs Stingray Ribbed Steel Fender 4-3/4 inch Width
42 reviews $206.92

FNA Custom Cycle 3.25 inch FNA Pancake Headlight - Vintage Style Clear Lens with LED
12 reviews $275.00

Prism Supply Co. 1/4 inch NPT 90 Degree Petcock - Brass
11 reviews $109.99

Cycle Standard Isolator Motor Mount - Front - 1991-2017 Harley-Davidson Dyna
7 reviews $117.41

Cycle Electric Generator DGV-5000L 12 Volt - Low Voltage - 1965-1984 Harley-Davidson
44 reviews $543.94 $582.26

Prism Supply Co. Sling Shot Clutch Control - Harley-Davidson 5 & 6 Speed - Stainless Steel
4 reviews $324.99

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

Cycle Standard Scrambler Handlebars - 1 inch - Chrome
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Prism Supply Co. Super Prism Throttle - 1 inch
3 reviews $229.99

Lowbrow Customs Dished Clamp-On Steel Motorcycle Oil Tank for Harley Sportster Hardtails
19 reviews $267.79

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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