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.

Custom Motorcycle Parts

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BEST SELLING BRANDS

TOP Custom Motorcycle Parts

Cycle Standard Inner Shift Lever 1982-Up Harley-Davidson FL Models - Black - OEM #33718-82B
$28.57

Cycle Standard Transmission Sprocket .75" Offset - 24 Tooth - 1991-2006 Harley-Davidson XL 1986-2006 Big Twin 5-Speed
$70.34

Cycle Standard Transmission Sprocket .5" Offset - 25 Tooth - 2006-2017 Harley-Davidson Dyna 2007-Up Softail
$70.46

Lowbrow Customs Lowbrow Customs Spark Plug Wire Set 1986-2003 Harley-Davidson XL 1980-1989 FLH/FLT
$25.29

Lowbrow Customs Lowbrow Customs Spark Plug Wire Set 2007-2021 Harley-Davidson XL 1999-2006 FLH/FLT
$25.29

Lowbrow Customs Lowbrow Customs Spark Plug Wire Set 1999-2017 Harley-Davidson FXD 2000-2017 FXST/FXST
$25.29

Lowbrow Customs Throttle Housing 1981-1995 Harley Thread-In Single Cable - Brass - 1 inch
5 reviews $134.96

British Standard Rocker Box Gaskets 1963-1970 Triumph 650cc T120 Bonneville/TR6/Tiger
3 reviews $9.91

Coker Tire Firestone Classic Motorcycle Tire 5.60-15
1 review $340.29

Prism Supply Co. Prism Supply Co. 2-Piece Tail Light - Gloss Black
$99.99

Prism Supply Co. Prism Supply Co. 2-Piece Tail Light - Brushed Aluminum
$94.99

Prism Supply Co. Prism Supply Co. 1.25 inch Speedster Tail Light - Brass
1 review $104.99

Prism Supply Co. Prism Supply Co. Ripple Tail Light - Brushed Aluminum
$99.99

Prism Supply Co. Prism Supply Co. Stainless Steel Bullet Tail Light - Weld-On
$99.99

Prism Supply Co. Prism Supply Co. Steel Bullet Tail Light - Weld-On
$89.99

Prism Supply Co. Universal Fender Mounting Bracket - Prism Supply Co. PS-41 Tail Light
$34.99

Prism Supply Co. Weld-On Stainless Steel Bracket - Prism Supply Co. PS-41 Tail Light
$21.99

Prism Supply Co. Weld-On Steel Bracket - Prism Supply Co. PS-41 Tail Light
$17.99

Prism Supply Co. Weld-On Stainless Steel Light Mount - Prism Supply Co. Box Chopper Tail Light
$22.99

Prism Supply Co. Weld-On Steel Light Mount - Prism Supply Co. Box Chopper Tail Light
$19.99

Prism Supply Co. Factory Style Stainless Steel Sissy Bar Light Mount - Prism Supply Co. Round Tail Lights
$29.99

Diamond Primary Chain 1957-2022 Harley-Davidson Sportster XL
$157.46 $174.95

Diamond Primary Chain 1936-1986 Harley-Davidson Big Twin 4-Speed 1984-2006 FXST/FLST 1991-2005 Dyna Glide
$188.06 $208.95

Diamond Primary Chain 1980-2006 Harley-Davidson FLT/FXR/FXRS/FXRT
$173.66 $192.95

DP Brakes Full Clutch Plate Kit 1971-E1984 Harley-Davidson Sportster XL
$254.95

DP Brakes Full Clutch Plate Kit 1986-1990 Harley-Davidson Sportster XL
$215.95

DP Brakes Full Clutch Plate Kit 1998-1999 Harley-Davidson Evo Big Twin 1999-2017 Twin Cam
$304.95

Drag Specialties Primary Chain 1957-2003 Harley-Davidson Sportster XL 2004-2022 XL 883
$154.71

Cycle Electric Rectifying Regulator CE-212 - 2009-2013 Harley-Davidson XL Models 2008 XR1200
3 reviews $166.67 $178.41

V-Twin Manufacturing Spring Fork Shock 1997-2006 Harley-Davidson FLSTS 2005-Up FLSTSC - Black
$75.58 $100.77

Gasbox Full Rigid Frame 2004-2022 Harley-Davidson Sportsters - Frisco Tank Mounts - Horseshoe Oil Tank
2 reviews $1,599.00

Gasbox Full Rigid Chopper Frame 2004-2022 Harley-Davidson Sportsters - 3" Up - Sporty Tank Mounts - Horseshoe Oil Tank
$1,599.00

Gasbox Full Rigid Frame 2004-2022 Harley-Davidson Sportsters - Sporty Tank Mounts - Horseshoe Oil Tank
$1,599.00

Gasbox Full Rigid Frame 1986-2003 Harley-Davidson Sportsters - Frisco Tank Mounts - Horseshoe Oil Tank
$1,599.00

Gasbox Full Rigid Chopper Frame 1986-2003 Harley-Davidson Sportsters - 3" Up - Sporty Tank Mounts - Horseshoe Oil Tank
$1,599.00

Gasbox Full Rigid Frame 1986-2003 Harley-Davidson Sportsters - Sporty Tank Mounts - Horseshoe Oil Tank
2 reviews $1,599.00

Gasbox Full Rigid Chopper Frame 1957-1985 Harley-Davidson Ironheads - 3" Up - Disc Brake rear - Frisco Tank Mounts - Horseshoe Oil Tank
$1,599.00

Gasbox Full Rigid Chopper Frame 1957-1985 Harley-Davidson Ironheads - 3" Up - Disc Brake rear - Sporty Tank Mounts - Horseshoe Oil Tank
$1,599.00

Gasbox Full Rigid Frame 1957-1985 Harley-Davidson Ironheads - Disc Brake rear - Sporty Tank Mounts - Horseshoe Oil Tank
$1,599.00

Drag Specialties Rear Drive Belt - 130 Tooth - 1-1/2 inch Width - 1991-2000 Harley-Davidson Dyna
$337.57

Drag Specialties Rear Drive Belt - 130 Tooth - 1-1/2 inch Width - 1994-1999 Harley-Davidson Softail
$337.57

Drag Specialties Rear Drive Belt - 137 Tooth - 1 inch Width - 2007-2021 Harley-Davidson XL
$258.48

Drag Specialties Rear Drive Belt - 137 Tooth - 1-1/8 inch Width - 2004-2006 Harley-Davidson XL 1200
$311.15

Drag Specialties Rear Drive Belt - 136 Tooth - 1-1/8 inch Width - 2004-2006 Harley-Davidson XL 883
$311.15

Drag Specialties Rear Drive Belt - 128 Tooth - 1-1/8 inch Width - 1991-2003 Harley-Davidson XL
$311.15

Cycle Electric LeBeef CE-500-CP Replacement Regulator for DGV-5000 Generator
$274.66 $294.02

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

Hawg Supply Honeycomb Kicker Pedal
$109.99

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

Cycle Standard Clutch Cable OEM #38606-87A 1987-1994 Harley-Davidson FXR +8 inch Extended
$75.02

Cycle Standard Throttle Idle Cable OEM #56401-96 2002-Up Harley-Davidson Sportster XL +8 inch Extended
$43.32

Drag Specialties Clutch Cable OEM #37000041 Harley-Davidson 2011-2017 1200XLCP/XLCB 2013-2017 1200XLV +8 inch Extended
$80.51

Drag Specialties Clutch Cable OEM #37000041 Harley-Davidson 2011-2017 1200XLCP/XLCB 2013-2017 1200XLV
$57.13 $78.39

Drag Specialties Clutch Cable OEM #38619-84 Harley-Davidson 1971-1985 XL +6 inch Extended
$63.55

Drag Specialties Points & Condenser Kit 1958-1969 Harley-Davidson XL With Magneto
$25.63

V-Twin Manufacturing Distributor Hold Down Clamp 1952-1970 Harley-Davidson XL 1936-1973 WL
$14.32 $20.45

S&S Cycle 2 Into 1 Superstreeet Exhaust - Chrome - 2018-2022 Harley-Davidson FXBB/FXLR/FLSL/FXFB/FLDE/FLSB/FLHC/FXST
$1,575.86 $1,750.95

S&S Cycle 2 Into 1 Superstreeet Exhaust - Black - 2018-2022 Harley-Davidson FXBB/FXLR/FLSL/FXFB/FLDE/FLSB/FLHC/FXST
$1,575.86 $1,750.95

American Prime Mfg. 7/16 inch Master Cylinder Rebuild Kit For All American Prime Mfg Master Cylinders
$32.94

American Prime Mfg. Replacement Master Cylinder Gasket For All American Prime Mfg. Hand Controls
$6.66

American Prime Mfg. Replacement Clutch Lever For All American Prime Mfg. Hand Controls - Polished
$56.76

American Prime Mfg. Replacement Brake Lever For All American Prime Mfg. Hand Controls - Chrome
$56.34

American Prime Mfg. Replacement Clutch Lever For All American Prime Mfg. Hand Controls - Chrome
$76.86

American Prime Mfg. Replacement Brake Lever For All American Prime Mfg. Hand Controls - Black
$50.23

American Prime Mfg. Replacement Clutch Lever For All American Prime Mfg. Hand Controls - Black
$59.20

American Prime Mfg. Brake/Mechanical Clutch Control Kit for 1 inch Handlebars - 7/16 inch Bore - Polished
$366.14

American Prime Mfg. Brake/Mechanical Clutch Control Kit for 1 inch Handlebars - 7/16 inch Bore - Chrome
$394.30

American Prime Mfg. Brake/Mechanical Clutch Control Kit for 1 inch Handlebars - 7/16 inch Bore - Black
$368.63

Reverb Inc. Reverb 13 Tail Light
$139.95

Colony #3766-1 Gear Box Adjusting Screw 1936 Harley-Davidson 61" - Parkerized
$24.99

Colony #3765-4 Carburetor Support Bracket 1936-1943 Harley-Davidson Solo 45/Servi-car - Parkerized
$13.20

Colony #3764-1 Foot Clutch Friction Spring Washer Disc 1936-1940 Harley-Davidson Big Twin 1938-1952 45 Solo 1938-1946 Servi-car - Parkerized
$14.30

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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