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

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

Colony #3759-3 Carbuetor Mounting Bracket 1966 Harley-Davidson FL/FLH - Parkerized
$21.50

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

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

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 #3139-4 Oversize 7/16-14 Transmission Case Bottom Stud Kit 1915-1936 Harley-Davidson Twins
$20.70

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

V-Factor Motorcycle Parts 18 Spoke Black Stainless Steel Brake Rotor - 11.5 inches - Rear - Replaces Harley-Davidson OEM #41789-92/41797-00
$89.95

V-Factor Motorcycle Parts 18 Spoke Stainless Steel Brake Rotor - 11.5 inches - Front - Replaces Harley-Davidson OEM #44136-92/44156-00
1 review $65.40

Dynatek Performance Electronics 2000I PC Programmable Electronic Ignition Kit for Harley-Davidsons - Includes Module and DC-6-5 Twin Fire II Mini Coil
2 reviews $506.14

Hawg Supply Weld-On Cable Guide - 5-pack
1 review $11.41

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

Hawg Supply Bolt-On Mid Peg Mounts 1970-1999 Harley-Davidson Big Twins
$124.99

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

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

Cycle Standard 5-1/2 inch Forged Aluminum Handlebar Risers - Black
$92.64

Cycle Standard 5-1/2 inch Forged Aluminum Handlebar Risers - Chrome
$92.64

Cycle Standard 3-1/2 inch Forged Aluminum Handlebar Risers - Chrome
1 review $85.08

Drag Specialties 6-1/2 inch Forged Aluminum Handlebar Risers - Chrome
$79.80

Drag Specialties 6-1/2 inch Pullback Handlebar Riser Set - Black
1 review $162.13

Cycle Standard Shift Lever - 1971-1974 Harley-Davidson XL And Early Big Twins (No Splines) - Chrome - OEM #34606-71, 34606-54TA
$34.06

Cycle Standard Shift Lever - 1982-1994 Harley-Davidson FXR - Chrome - OEM #34599-81
$31.80

Cycle Standard Wagner Lockheed Type Rear Disc Brake Master Cylinder - Chrome - 1973-E1979 Harley-Davidson FL/FX
1 review $110.07

Cycle Standard Solo Custom Mini Rear Brake Master Cylinder Assembly - Black
$189.58

Cycle Standard Brake Pedal Rubber 1971-1975 Harley-Davidson FX (except FXWG, FXST) OEM #42394-65
$8.03

Cycle Standard Passenger Peg Set With Female Thread Harley-Davidson FX/XL/Universal - OEM #50907-69A
$84.92

Drag Specialties Lower Fork Slider Bushings - 39mm - 0.778" - Harley-Davidson OEM #W4546587
1 review $16.00

Drag Specialties Upper Fork Slider Bushings - 39mm - 0.588" - Harley-Davidson OEM #45461-87
2 reviews $16.00

Performance Machine 1 inch Contour Billet Brake Master Cylinder 11/16" Bore - Chrome
$461.95

Performance Machine 1 inch Contour Billet Clutch Lever Assembly - Chrome
$343.95

Performance Machine Vintage 4 Piston Caliper 125 X 4R - Black
$586.95

Progressive Suspension 412 Series 12" Shocks Chrome With Short Covers 1973-1986 Harley-Davidson Shovelheads
$379.95

Progressive Suspension 412 Series 13.5" Shocks Chrome With Full Covers 1958-1972 Harley-Davidson FL/FLH
1 review $454.95

Progressive Suspension 412 Series 12" Shocks Black With Short Covers 1973-1986 Harley-Davidson Shovelheads
$379.95

ODI Vans V-Twin Lock-On TBW by ODI - Gum Rubber/Black Checkered Anodize - 1"
1 review $79.95

ODI Vans V-Twin Lock-On TBW Grips by ODI - Black/Matte Black - 1"
1 review $75.95

ODI Vans V-Twin Lock-On Cable Throttle Grips by ODI - Brown/Black - 1"
$75.95

Colony #3745-1 Steering Damper Lower Frame Bracket 1940-1952 Harley-Davidson 45's 1940-1957 Servi-car - Parkerized
$20.00

Colony #3746-1 Steering Damper Lower Frame Bracket 1940-1952 Harley-Davidson 45's 1940-1957 Servi-car - CAD Plated
$20.00

Colony #3748-1 Steering Damper Friction Washer And Windshield Mount 1924-1929 Harley-Davidson LT/QT 1930- 1967 Big Twins 1937-1957 45's/Servi-car - Parkerized
$11.00

Colony #3747-2 Steering Damper Friction Washers 1930-1948 Harley-Davidson All Models 1949-1957 45's/Servi-car
$22.00

Colony #3743-5 Disc Brake Rotor Allen Screws 1982-1985 Harley-Davidson FLT Cast Wheels - Zinc Plated
$13.20

Colony #3739-1 Chain Housing Plug 1980-1984 Harley-Davidson FLT 1983-1984 FXRT
$13.75

Colony #3722-2 Sprocket Cover Pin 1941-1973 Harley-Davidson 45's
$9.90

Colony #3711-4 Rocker Arm Spacer Kit 1966-1984 Harley-Davidson FL 1971-1984 FX
$20.00

Colony #3710-12 Shifter Linkage Mounting Kit 1975-1976 Harley-Davidson XLH/XLCH - Zinc Palted
$13.75

Colony #3709-5 Disc Brake Rotor Allen Screw Kit 1980-1981 Harley-Davidson FLT Cast Wheels - Zinc Plated
$12.10

Colony #3706-5 Dash Cover Mounting Kit 1936-1946 Harley-Davidson Twins - Chrome Plated
$5.50

Colony #3659-1 Linkert Main Nozzle 1940-1951 Harle-Davidson OHV
$30.00

Colony #3655-1 Linkert High Speed Needle 1936-1939 Harley-Davidson OHV - CAD Plated
$29.99

Colony #2698-1 Linkert 1st Type High Speed Needle 1936-1939 Harley-Davidson OHV - CAD Plated
$29.99

Samwel Supplies Reproduction Bearing Adjuster Nuts for Springer Forks - Chrome
$74.88

The Cyclery Springer Fork Windshield Apron/Guard
$85.17

Cannonball Springbrake Disc Brake Kit for I-Beam And Classic Springer Forks - Star Hub
1 review $1,656.10

Cannonball Springbrake Disc Brake Kit for I-Beam And Classic Springer Forks - 1978-1999 Narrow Dual Flange Front Hub
$1,735.88

Cannonball Extended Throwout Bearing for Stealthstarter Electric Starter 1975-1984 4 Speed Harley-Davidson Big Twins
$90.54

Colony #3724-3 Truss Rod Right Front Coupling Stud 1951-1973 Harley-Davidson Servi-car - Parkerized
$20.00

Colony #3723-3 Truss Rod Right Front Coupling 1951-1973 Harley-Davidson Servi-car - Parkerized
$20.00

Colony #3700-5 Ignition Coil Mount Plate 1985-2003 Harley-Davidson XL 1994-2001 Touring 1991-1999 Softail 1991-1994 Dyna - Chrome Plated
1 review $11.00

Colony #3701-5 Ignition Coil Mounting Plate Kit 1949-1959 Harley-Davidson Big Twins 1952-1970 K/XL - Chrome Plated
$9.90

Colony #3380-6 Fork Panel Mounting Kit 1949-1970 Harley-Davidson Big Twins 1952-1970 K/XL - Chrome Plated
$19.80

Colony #3726-5 Disc Brake Rotor To Hub 1974-1980 Harley-Davidson FX 1974-1977 XL - Zinc Plated
$7.54

Colony #3731-2 Crankcase Bolt Set 1930-1978 Harley-Davidson Big Twins - Chrome Plated
$14.30

Colony #3730-2 Crankcase Bolt Set 1930-1978 Harley-Davidson Big Twins - CAD Plated
$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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Custom Motorcycle Parts FAQ

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