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

Prism Supply Co. Factory Style Stainless Steel Sissy Bar Light Mount - Prism Supply Co. PS-41 Tail Light
$31.99

Prism Supply Co. Factory Style Stainless Steel Sissy Bar Light Mount - Prism Supply Co. Box Chopper Tail Light
$34.99

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

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

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
1 review $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 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 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
$277.67

Drag Specialties Rear Drive Belt - 137 Tooth - 1-1/8 inch Width - 2004-2006 Harley-Davidson XL 1200
$255.41

Drag Specialties Rear Drive Belt - 136 Tooth - 1-1/8 inch Width - 2004-2006 Harley-Davidson XL 883
$255.41

Drag Specialties Rear Drive Belt - 128 Tooth - 1-1/8 inch Width - 1991-2003 Harley-Davidson XL
$255.41

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

Lowbrow Customs Harley-Davidson Ironhead Sportster EFI Replica Stock Style Gas Tank - 2.4 gallon
$246.92

FNA Custom Cycle FNA Mini Far-E Headlight - Smoke Lens
1 review $285.00

FNA Custom Cycle FNA Mini Far-E Headlight - Clear Lens
1 review $285.00

FNA Custom Cycle Dual Headlight Mount - Long - Stainless Steel
$195.00

Cycle Standard Clutch Cable OEM #38618-52 1952-1967 Harley-Davidson FL/EL +8 inch Extended
$30.35

Cycle Standard Throttle Idle Cable OEM #56309-96 1996-2001 Harley-Davidson Sportster XL +8 inch Extended
$32.99

Cycle Standard Clutch Cable OEM #38699-04 2004-Up Harley-Davidson Sportster XL +8 inch Extended
$67.83

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 +6 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
$40.91 $56.13

Drag Specialties Clutch Cable OEM #38606-87A Harley-Davidson FXST 1987-1999
$73.09

Drag Specialties Clutch Cable OEM #38599-83A Harley-Davidson 5 Speed Big Twin 1980-1986 +6 inch Extended
1 review $63.55

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

V-Factor Motorcycle Parts MCM Slash Cut Drag Pipes 1957-1985 Harley-Davidson Sportster (Except 1979) - Chrome
2 reviews $129.99

S&S Cycle 2 Into 1 Superstreeet Exhaust - Brushed Stainless - 2018-2022 Harley-Davidson FXBB/FXLR/FLSL/FXFB/FLDE/FLSB/FLHC/FXST
$1,529.96 $1,699.95

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. 9/16 inch Master Cylinder Rebuild Kit For All American Prime Mfg Master Cylinders
$32.94

American Prime Mfg. 11/16 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 Brake Lever For All American Prime Mfg. Hand Controls - Polished
1 review $48.90

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
$65.09

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 - 11/16 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 #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

Colony #3753-12 Spring Clamp U-Bolt Kit 1934-1950 Harley-Davidson Servi-car - Parkerized
$95.00

Colony #3751-1 Intake Manifold Conversion Nipple 1940-Up Manifold On 1936-1939 Harley-Davidson OHV
$22.45

Colony #3744-1 Stem Crown Nut Kit 1936-1948 Harley-Davidson Big Twin Springer
$51.70

Colony #3740-1 Oversized Steering Head Cup 1936-1947 Harley-Davidson Knucklehead 1948-1949 Panhead 1937-1938 U Models - CAD Plated
$42.00

Colony #3733-1 Steering Head Cup 1936-1947 Harley-Davidson Knucklehead 1948-1949 Panhead 1937-1938 U Models - CAD Plated
1 review $42.00

Colony #3732-1 Upper/Lower Fork Neck Bearing Race 1936-1949 Harley-Davidson Knucklehead 1937-1948 Big Twin U Models 1948-1949 Panhead
$27.00

Colony #3720-1 Front Axle Spacer 1930-1936 Harley-Davidson VL - Parkerized
$14.52

Colony #3159-4 Headlamp Rivet Kit 1935-1948 Harley-Davidson Springers
$17.33

Colony #3155-4 Clutch Booster Spring Cover Moutning Kit 1952-1967 Harley-Davidson FL/FLH - CAD Plated
$6.05

Colony #3145-4 Rocker Box Drain Tube Kit 1936-1937 Harley-Davidson 61 Knucklehead
$35.00

Colony #3140-4 Oversize 1/2-13 Transmission Case Bottom Stud Kit 1915-1936 Harley-Davidson Twins
$22.45

Colony #3124-12-P Motor Case Polished Allen Mounting Kit 2017-Up Harley-Davidson Touring Models - Chrome Plated
$32.40

Colony #3124-12 Motor Case Knurled Allen Mounting Kit 2017-Up Harley-Davidson Touring Models - Chrome Plated
$27.00

Cycle Standard Brake/Mechanical Clutch Controls Kit - Chrome - 1999-2007 Harley-Davidson FLT/FLHX/FLHT/FLTR/FLHR
$264.48

Dynatek Performance Electronics Programing Kit for Dynatek 2000I PC Programmable Ignitions
$177.77

Hawg Supply "Swirl" Engine Cover 1936-1954 Harley-Davidson Big Twins - Machined Finish
$99.99

Hawg Supply Linkert Carburetor to S&S Manifold Adapter Plate
1 review $60.00

Hawg Supply Cast Diamond Plate Bird Deflector For Linkert Carburetors
$74.99

Hawg Supply Ratchet Top Shifter - Bend-Back
1 review $109.99

Hawg Supply Ratchet Top Shifter - Straight Arm
1 review $109.99

Cycle Standard 3-1/2 inch Forged Aluminum Handlebar Risers - Chrome
1 review $79.51

Cycle Standard 8-1/2 inch Pullback Handlebar Riser Set - Black
$125.27

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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Custom Motorcycle Parts FAQ

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