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

Gasbox Chrome Kick Back Sissy Bar - Round Fender - Box Tail Light
5 reviews $189.95

Gasbox Chrome Square Top Sissy Bar - Flat Fender - Model A Tail Light
$189.95

Cycle Standard Fat Bob Style Gas Tanks - 1948-1984 Harley-Davidson FX/FL - 3.5 Gallon
4 reviews $284.75

Cycle Electric Alternator Kit CE-84T-15 80 Series 50 Amp 2014-2016 Harley-Davidson FLH/FLT - Water Cooled
$563.28 $602.97

Lowbrow Customs Solo Seat Weld-On Spring Mounts / Perches
75 reviews $40.22

No School Choppers 1928 - 1932 Ford Duolamp -Stop Lens- Model A stainless steel Tail Light for your bobber or chopper
43 reviews $56.16

Lowbrow Customs Throttle Housing 1981-1995 Harley Thread-In Single Cable - Aluminum - 1 inch
14 reviews $93.46

Parts Unlimited AGM RTX5L-BS Maintenance Free Battery - For Kick Start Motorcycles
11 reviews $50.95

Gasbox Hi Lo Shotgun Exhaust Pipe Set 1970-1984 Harley-Davidson Shovelhead
9 reviews $279.99

Cycle Standard 4-1/2 inch diameter Chrome Early Model Headlight
25 reviews $92.59

Lowbrow Customs Cloth Spark Plug Wires - 7mm Vintage Braided - Sold by Foot - Assorted Colors Available
42 reviews From $14.96 $29.92

Cycle Standard Chrome Kickstand - 1 inch Under - 1989-2003 Harley-Davidson XL Models - OEM #50006-89
15 reviews $55.27

Cycle Standard Asphalt Wire Loom - 3/8 Inch Diameter, 10-Foot Length for Wiring Protection
21 reviews $29.12

Cycle Electric Alternator Kit CE-84T-04R 2004-2005 Harley-Davidson FLH/FLT
$552.75 $591.70

Cycle Electric LeBeef CE-540-CP Regulator for use on 65a 12v Harley-Davidson Generators
$275.98 $295.43

Cycle Standard Outer Primary Chain Tensioner - 1996-2006 Harley-Davidson Twin Cam OEM# 39954-99A
$34.49

Lowbrow Customs Drag Bar Handlebars - 1 inch - Chrome
12 reviews From $55.13

Drag Specialties 4-1/2 inch Pullback Handlebar Riser Set - Chrome
$137.75

Cycle Electric Alternator Kit CE-84T-12 2011-2113 Harley-Davidson FLH/FLT
1 review $550.12 $588.88

S&S Cycle HI-4N Ignition Module Kit - 1970-1999 Harley-Davidson Big Twins 1971-1990 XL
1 review $550.04 $599.95

Gasbox Exhaust Pipe Set 1966-1969 Harley-Davidson Generator Shovelhead FL FLH 74 ci - Bare Steel
2 reviews $275.00

Cycle Standard Front Fender - Chrome - Harley-Davidson 1973-up XL FX FXR 35mm 39mm Narrow Glide Front Forks - OEM #59031-83
19 reviews $109.90

Cycle Electric Alternator Kit CE-88T 2012-2017 Harley-Davidson Softail
$548.86 $587.53

Cycle Standard 5-3/4 inch diameter Diamond Black Halogen Headlight - Clear Lens
29 reviews $77.98 $95.32

Cycle Electric Regulator CE-540 for use on 65a 12v Harley-Davidson Generators
28 reviews $181.55 $194.34

Cycle Electric Alternator Kit CE-81A-97R 1997-1998 Harley-Davidson FLH/FLT/FXR
$543.97 $582.29

British Standard Smiths Speedometer Replica - Grey Face 1:1.25 Ratio - For Triumph Motorcycles
5 reviews $108.73

Cannonball Extended Throwout Bearing for Stealthstarter Electric Starter 1936-1975 4 Speed Harley-Davidson Big Twins
1 review $90.54

Cycle Standard Clutch Cable OEM #38699-04 2004-Up Harley-Davidson Sportster XL +4 inch Extended
6 reviews $77.43

Pingel 1/4 inch NPT Power-Flo Petcock - Hex Body - Aluminum - Inward
3 reviews $135.43

Cycle Electric Alternator Kit CE-24S-04 for 2004-2006 Harley-Davidson 1200 Sportsters
$541.41 $579.56

Burly Brand Burly Slammer 10.5 inch Shocks - Black - Sportster XL 1988 - 2003
18 reviews $270.59 $278.95

8mm Suppression Core Cloth Spark Plug Wire Sets - Black with Red tracers — Lowbrow Customs 8mm Cloth 90 Degree Spark Plug Wire Sets - Black with Red tracers
33 reviews $36.03

Prism Supply Co. Jockey Shifter for Harley-Davidson Big Twin - Short Arm
6 reviews $89.99

Gasbox Tall Chopper Bolt On Sissy Bar - 2004 & Up Sportsters
62 reviews $134.95

Gasbox Chopper Bolt On Sissy Bar - 1994 - 2003 Sportsters
32 reviews $134.95

Gasbox Hidden Strap Rear Fender Strut - Flat Fender
3 reviews $89.95

Cycle Standard Chrome Rear Axle Kit 1980-2001 Harley-Davidson FL FLH FLT 82-94 FXR 86-06 FLST
3 reviews $67.40

Coker Tire Firestone Deluxe Champion Motorcycle Tire 4.00-18
1 review $269.54

Lowbrow Customs Pursuit Grip Set - Raw Aluminum
24 reviews $107.67

Drag Specialties 530 O-Ring Drive Chain - 110 Links includes Master Link - Chrome
$181.99

Amal Carburetor Concentric 928 930 932 Carburetor Rebuild Kit 622/238 Triumph BSA
21 reviews $33.30

Gasbox Big Twin CV Carburetor Support Bracket - 1985-1999 Harley-Davidson Evolution Big Twin
30 reviews $27.99

Cycle Electric Alternator Kit CE-73TR 2001-2006 Harley-Davidson Softail Models
$531.12 $568.54

Cycle Standard Rectangular Motorcycle Mirror - Perch Mount - Chrome
18 reviews $37.87

Lowbrow Customs Bolt-On Battery Box & Fender Mount for 1982-2003 Sportster Weld-On Hardtail
11 reviews $37.83

Cycle Electric Rectifying Regulator CE-445-97 - 1997-2001 Harley-Davidson FLT/FLH
$264.29 $282.91

Lowbrow Customs Pursuit Foot Peg Set - Black
25 reviews $88.05 $107.11

Cycle Electric Alternator Kit CE-23S-07 for 2007-2008 Harley-Davidson 883 Sportsters
$527.62 $564.79

Gasbox Big Twin Voltage Regulator Mount
27 reviews $21.95

Cycle Standard Throttle Cable OEM #56308-96 1996-2003 Harley-Davidson Sportster XL
14 reviews $27.71

Cycle Standard Bullet Tail Light / Turn Signal - Chrome
35 reviews $30.91

Old-Stf Cycle Aluminum KR Bee Blocker - Brass Screen - S&S Super E/G Carburetor Velocity Stack
6 reviews $174.95

Gasbox Strong Arm Top Motor Mount with Coil Mount - 1984-1999 Harley-Davidson Big Twin Evolution
$74.95

Gasbox Strong Arm Top Motor Mount With OEM #71425-77 Ignition Switch Mount 1948-1984 Harley Big Twins
2 reviews $74.95

Gasbox Strong Arm Top Motor Mount With Coil Mount 1948-84 Harley Big Twins
6 reviews $74.95

Gasbox Coil and Ignition Switch Universal Mount - Harley Davidson Big Twin 1948-1984
17 reviews $34.95

V-Factor Motorcycle Parts 18 Spoke Stainless Steel Brake Rotor - 11.5 inches - Rear - Replaces Harley-Davidson OEM #41789-92/41797-00
$65.40

Cycle Standard Bayonet / Cam Harley Style Vented 2.5" Gas Cap - Chrome
13 reviews $37.35

Cycle Standard Clutch Cable OEM #38621-86A 1986-2003 Harley Sportster 1100 & 1200 XL
20 reviews $32.62

Cycle Standard 22mm Petcock Harley-Davidson Style - Chrome - Left Hand Outlet
30 reviews $40.11

Cycle Standard Screw-In Harley Stock Style Vented Gas Cap - 1996 & up - Black
64 reviews $22.67

Cycle Standard Swingarm Isolator Mount 1987-2008 Harley-Davidson FLT 87-94 FXR
1 review $28.93

V-Factor Motorcycle Parts MCM Slash Cut Drag Pipes 2004-2013 Harley-Davidson Sportster - Chrome
1 review $129.99

Gasbox Chrome Shorty Grab Bar - Round Fender
8 reviews $129.95

D.I.D. Chains 530 VX3 X-Ring Chain - 110 Links - Gold
$258.89 $287.66

Lowbrow Customs Primary Mount 13/16 inch Ignition Key Switch Bracket for Harley-Davidson Sportster 1991-2003
40 reviews $27.17

Lowbrow Customs Pursuit Shifter Peg for Harleys - Solid Brass
41 reviews $57.31

Lowbrow Customs Deluxe Choke Knob Enricher for Harley-Davidson S&S Super E and G Carburetors - Brass
75 reviews $51.54

Lowbrow Customs Heartthrob Motorcycle Mirror - Perch Mount - Chrome
37 reviews $46.84

Cycle Standard Rear Brake Master Cylinder - 1987-2003 Harley-Davidson XL - OEM #42456-87C
1 review $128.44

Lowbrow Customs Beck Grips - Marbled Red - 1 inch
60 reviews $25.65

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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