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

Airspeed Cycles Wide Bottom Springer 6 Bend Handlebars - 8 inch Rise - 1 inch - Stainless Steel
1 review $225.00

Lowbrow Customs Shotgun Exhaust Pipes 2004-2021 Harley-Davidson Sportster XL - Raw Steel
3 reviews $299.93

Gasbox Top Motor Mount - 1986-2003 Sportster - Black - With Coil and Stock Ignition Switch Mounts
37 reviews $49.95

Lectron Lectron Billetron Carburetor for 53-100 Cubic Inch Harley-Davidsons
$899.00

Cycle Standard 14 Piece Aluminum Wheel Axle Spacer Kit - 1.125 inch O.D. x 3/4 inch I.D.
45 reviews $52.80

Cycle Standard Mini Speeder Bullet Style Turn Signals - Chrome
24 reviews $55.78 $76.90

LePera Signature II Solo Seat - Diamond - Rigid Frame
1 review $295.00

LePera Le Pera Signature II Solo Seat fits Rigid Frame
4 reviews $295.00

Andrews 4-Speed Gear Set 1936-76 Harley-Davidson Big Twin - Close Ratio
$881.06 $978.95

Wassell Vape Electronic Ignition Triumph BSA Norton
5 reviews $220.15

Lowbrow Customs Frisco Mount Sportster Gas Tank - Standard Width - Bayonet Filler - 2.5 gallon
16 reviews $219.94

Cycle Standard 39MM Chrome Fork Tubes - 25 inch - Stock Length
7 reviews $219.72

Lowbrow Customs Pursuit Foot Peg Set - Brass
38 reviews $175.72

Sully's Customs Solo Seat - Black Vertical Pleat - Rigid Frame
3 reviews $175.00

Cycle Electric Rectifying Regulator CE-601-08 - 2008-2016 Harley-Davidson Softail Models
$218.50 $233.89

Mid-USA Hardbody Handlebar Riser Adapter Kit for Springers - Chrome
2 reviews $109.15

Cycle Electric Rectifying Regulator CE-608 - 2009-2013 Harley-Davidson FLH FLT Models with Low Mount Oil Cooler
20 reviews $217.85 $233.20

Gasbox Exhaust Squish Pipe 1936-1964 Harley-Davidson Big Twins
$72.50

Cycle Standard Z Bar Handlebars - 1 inch - 8 inch Rise - Black
11 reviews From $108.37

Arlen Ness Big Sucker Stage 1 Air Filter Kit - Black - 1988-2020 Harley-Davidson XL
11 reviews $215.96 $239.95

Belt Drives LTD. 11mm/1.5 inch Primary Belt Drive with Idler Gear - Electric Start - 1965-E1984 Harley-Davidson Big Twin
2 reviews $860.11 $905.38

Sully's Customs Skinny Style Seat - Black Horizontal Pleat - 1982-2003 Harley-Davidson Sportsters
2 reviews $214.99

Lowbrow Customs Rabbit Ears Handlebars - 1 inch - Black
20 reviews From $142.64

Belt Drives LTD. 8mm/3 inch Primary Open Belt Drive - Kick Start - Spline Shaft - 1955-1984 Harley-Davidson Big Twin
1 review $857.93 $903.08

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

Performance Machine Performance Machine Classic 4 Piston Brake Caliper - Black
$427.84

Cycle Standard 41MM Chrome Fork Tubes 1984-1999 Harley-Davidson FXWG/D FXST - 28-1/4 inch - 4 Over
$213.18

Lowbrow Customs Coffin Chopper Gas Tank - 1.4 Gallon - USA Made
$283.82

EMGO Chrome Dual Lead Coil 12V 4.2 OHM for your Triumph Chopper or Bobber
7 reviews $85.08

Cycle Standard 39mm Fork Leg Assembly Rebuild Kit 1988-2022 Harley-Davidson XL 1991-1998 FXD 1987-2000 FXR
$84.74

D.I.D. Chains 530 VX3 X-Ring Chain - 120 Links - Gold
1 review $282.30 $313.67

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

Dynatek Performance Electronics 5 ohm Dual Fire Coil - for Points Ignition
4 reviews $144.43

V-Twin Manufacturing Ironhead Sportster Fork Neck Cup Conversion 7/8 inch to 1 inch
8 reviews $84.30 $120.43

Lowbrow Customs Radius Breather Bolts for Harley-Davidson Evo - Black ED
51 reviews $49.49

Lowbrow Customs Finned Air Cleaner Cover for S&S Super E/G - Semi Polished
65 reviews $93.48

Lowbrow Customs Stainless Steel Solo Seat Hinge / Pivot Bracket - Weld-On
15 reviews $93.46

Lowbrow Customs Belt to Chain Conversion Kit Harley-Davidson Dyna 1994-99 - Black Sprocket
11 reviews $209.99

Lowbrow Customs Belt to Chain Conversion Kit Harley 883 Sportster 2004 & up - Black Sprocket
24 reviews $209.99

Lowbrow Customs Belt to Chain Conversion Kit Harley 1200 Sportster 2004 & up - Black Sprocket
50 reviews $209.99

Prism Supply Co. Prism Supply Co. Box Chopper Tail Light - Brushed Aluminum
13 reviews $119.95

Cycle Standard Box Chopper Tail Light
37 reviews $64.19

Til Death Cycles Dyna Case Saver
2 reviews $119.12

Lowbrow Customs Belt to Chain Conversion Kit Harley-Davidson Dyna 2000-05 Mag Wheels - Chrome Sprocket
$207.99

Cycle Electric Rectifying Regulator CE-208 - 1994-2003 Harley-Davidson Sportster XL
12 reviews $166.04 $177.74

British Standard Triumph Upswept Drag Exhaust Pipes - Bare Steel
8 reviews $276.19

Cycle Standard Blackbird Legacy Gas Tank for 2007-2022 EFI Harley-Davidson Sportsters - 3.5 gallon
20 reviews $275.08

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

Cycle Standard Engine Stabilizer Link - Chrome - 1982-94 Harley-Davidson FXR 91-94 Dyna 80-08 Touring
2 reviews $82.08

S&S Cycle Carb Mainfold Insulator Block for Super E Carburetors S&S Cycle #16-0491
12 reviews $40.95

Cycle Standard Stock Style Harley King Sportster Gas Tank 1986 - 1994 - Right Side Petcock - 2.9 gallon
5 reviews $204.40

Cycle Standard Brake/Mechanical Clutch Controls Kit - Chrome - 1999-2007 Harley-Davidson FLT/FLHX/FLHT/FLTR/FLHR
$272.41

Cycle Standard Harley King Sportster Gas Tank 2.9 Gallon Stock Style for 1995-2003 with Left Side Petcock
17 reviews $203.71

Cycle Electric Rectifying Regulator CE-320L - 1989-1999 Harley-Davidson Softails
14 reviews $162.71 $174.17

Cycle Standard 6 Post Ignition Key Switch Replaces Harley-Davidson OEM #71501-73A - Chrome Bezel
12 reviews $50.78

Lowbrow Customs KR Style Bolt-On Hardtail Rear Frame Section for 1952-1969 Harley-Davidson Ironhead Sportster and K Model
5 reviews $405.59

Cycle Standard Axed Chopper Gas Tank 2.2 Gallon
33 reviews $202.64

Lowbrow Customs Gas Tank Adapter Brackets 1982-2003 Harley Sportsters XL
54 reviews $54.00

Prism Supply Co. Linkert Snap Throttle Kit
$89.99

Prism Supply Co. Harley Jockey Shifter Kit - 5 & 6 Speed Big Twin - Stainless Steel
14 reviews $89.99

Lowbrow Customs Throttle Housing 1996 & up Harley Push-In Dual Cable - Brass - 1 inch
5 reviews $134.96

Gasbox The Traveler DIY Sissy Bar Kit
7 reviews $89.95

Barnett Clutch & Cable Universal Throttle Cable - Black - 53 inch
13 reviews $27.63

Cycle Standard Polished Clutch Lever Assembly - 1968-1971 FL/FX 1971-1972 XL - OEM #38608-68
6 reviews $29.66

Cycle Standard Round Motorcycle Mirror - Perch Mount - Chrome
25 reviews $38.03

Cycle Standard High Performance Clutch Pressure Plate for Harley Shovelhead Replaces OEM #37871-41
16 reviews $46.94

Dynatek Performance Electronics Twin Fire II Single Fire Miniature 3 Ohm Coil
1 review $199.99

Cycle Standard Rocker Box Covers - Chrome - 1986-2003 Harley-Davidson Sportster XL
2 reviews $158.54

Cycle Standard 3 position Ignition Key Switch Replaces Harley-Davidson OEM #71425-77 - Chrome Body / Chrome Bezel
18 reviews $41.58

Cycle Standard Isolator Mount - Rear - 2004-2021 Harley-Davidson Sportster XL
3 reviews $30.21

Drag Specialties Neck Post Bearing & Race Set 1980-13 Harley-Davidson FLT/FLHT 99-13 FLTR/FLHR 60-86 FL/FX/FXWG 84-17 FXST/FLST 99-17 Dyna 82-21 XL
1 review $30.98

Unity Manufacturing TUFF Stainless Steel Brake Rotor - 10 inch - Front
$192.86

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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