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

Til Death Cycles 49mm Harley-Davidson Cartridge Eliminator Kit
2 reviews $178.28

Lowbrow Customs Rear Motor Mount Plates for Triumph Motorcycles - Stock Style - 1963 - 1970 Triumph
18 reviews $59.36

James Gaskets Primary Cover Gasket & Seal Kit 2004-2022 Harley-Davidson XL
1 review $35.61

Lowbrow Customs Fish Scale Grips - Black - 1inch
57 reviews $25.43

Cycle Standard Single Gauge Bracket - Chrome - 1995-2011 Harley-Davidson XL883 1995-2005 FXD Models
$88.99

Cycle Standard Universal Motorcycle Solo Seat Hinge / Pivot Bracket
19 reviews $22.19

Colony #2464-5 Brake Drum Wheel Mounting Bolt Set - 1936-1972 Harley-Davidson Knucklehead/Panhead/Shovelhead - Parkerized
4 reviews $25.30

Colony #9608-10 Hex Bolt & Washer Kit Rear Wheel 1973-1992 Harley-Davidson Big Twin 1979-1990 XL - Chrome Plated
3 reviews $29.44

Cycle Standard Screw-In Harley Stock Style Non-Vented Gas Cap - Left Side - 1982-1995 - Chrome
$29.43

Cycle Standard Baffles for 1-1/2 inch Exhaust Pipes - Universal - 4 inch
18 reviews $17.62

Colony #3308-6 Locking Exhaust Bolt Kit 1966-1984 Harley-Davidson Shovelhead
13 reviews $22.00

Gasbox Tumbled Stainless Steel Points Cover for Harley-Davidson Sportsters and 1970 - 1999 Big Twins
3 reviews $21.95

Haifley Seats Cobra Seat Pan - 2004-2021 (Excl. 2007-09) Harley-Davidson Sportsters
$175.00

Airspeed Cycles Wide Bottom Springer Ape Hanger Handlebars - 7 inch Rise - 1 inch - Stainless Steel
$175.00

Colony #2078-18 Lower Rocker Box Mounting Kit Harley-Davidson Evo Big Twin and Sportster
17 reviews $35.00

LCFabrications "The OG" Clutch Switch Pod Delete - Polished - for Harley-Davidson
8 reviews $35.00

Prism Supply Co. Universal Fender Mounting Bracket - Prism Supply Co. Box Chopper Tail Light
$34.99

Prism Supply Co. Weld-On Stainless Steel Light Mount With License Plate Bracket - Prism Supply Co. Box Chopper Tail Light
$34.99

Kustom Tech In-Line Brass Motorcycle Petcock
13 reviews $87.36

Cycle Standard Throttle Cable OEM #56308-96 1996-2001 Harley-Davidson Sportster XL +8 inch Extended
1 review $34.94

James Gaskets Exhaust Port Gasket Kit - Thin Graphite Wire Gaskets & Hex Nuts - 1984-Up Harley-Davidson Evo/Twin Cam 1986-2022 XL
1 review $24.95

Cycle Standard Chrome 6V Coil 1947 & Up Harley-Davidson
2 reviews $58.18

Lowbrow Customs 39mm Low Profile Fork Caps - Black Anodized Aluminum

12 $58.02

Cycle Standard Chrome Rear Axle Kit 1952-1978 Harley-Davidson Sportster XL
1 review $57.68

Cycle Standard Throttle Cable OEM #56400-96 1996-Up Harley-Davidson Sportster XL
10 reviews $34.60

Cycle Standard Throttle Idle Cable OEM #56401-96 1996-Up Harley-Davidson Sportster XL
9 reviews $34.55

Cycle Standard 39mm Fork Seal Rebuild Kit - Showa Forks - 1988-2020 Harley-Davidson XL 1988-94 FXR 1987-2005 Dyna Models
6 reviews $15.68

Cycle Standard Straight 3/8 inch/10mm Compression Banjo Fitting - Stainless
$14.29

Cycle Standard Harley Shifter Shaft Lever OEM #33709-82A
17 reviews $21.38

Colony #7131-12 Aluminum Alloy Tubular Adjustable Pushrods & Lifter Adapters 1953-1965 Harley-Davidson Panhead
$85.45

Colony #2190-3 Brake Line Banjo Bolt 3/8-24 Thread Harley-Davidson OEM #41747-82A - Chrome Plated
6 reviews $14.16

Goodridge 30350TC-C - Universal Braided Stainless Brake Line - 50" - Clear Coated
$84.95

V-Twin Manufacturing Forged Floorboard Tab Set for 1 inch Tubing
$39.67 $56.57

Cycle Standard 7.5 inch Wide Flat Trailer Fender with Bobbed End - Steel
1 review $169.37

Cycle Standard 4-1/2 inch diameter Black Early Model Headlight
30 reviews $84.63

British Standard Clutch Plates - Steel- For Triumph / BSA Motorcycles OEM #57-1363
14 reviews $84.60

British Standard Primary Gasket for 1963-1982 650/750 unit Triumph Motorcycles OEM #71-7009
4 reviews $16.91

S&S Cycle 2.5 inch Velocity Stack for S&S Super E/G Carburetor
2 reviews $168.69 $183.95

No School Choppers 1928 - 1932 Black Out Ford Duolamp - Red/Yellow Lens - Model A stainless steel Tail Light for your bobber or chopper
$56.16

No School Choppers 1928 - 1932 Black Out Ford Duolamp -Original Red Lens- Model A stainless steel Tail Light
8 reviews $56.16

Drag Specialties Clutch Cable Harley-Davidson 4 Speed Big Twin 1968-86 - 50" Long
3 reviews $56.13

Gasbox BASIC License Plate Bracket - Vertical
$27.99

Gasbox S&S Carburetor Support Bracket - 1999 - 2006 Harley-Davidson Twin Cam
7 reviews $27.99

Lowbrow Customs Aftermarket Springer Headlight Mounting Bracket - Stainless Steel
17 reviews $33.56

Drag Specialties 530 O-Ring Drive Chain - 110 Links includes Master Link
$167.75

Drag Specialties 30A Circuit Breaker 1970-1999 Harley-Davidson Big Twin/XL 1999 Twin Cam
2 reviews $7.95

Cycle Standard Harley-Davidson Shifter Peg - Replaces OEM #34611-65
56 reviews $7.57

Colony #1014 Complete Show Bike Kit Knurled Allen Hardware 1991-1993 Harley-Davidson Sportster - Chrome Plated
$166.28

Burly Brand Ape Hanger Handlebars - 1 inch - 12 inch Rise - Chrome

2 $165.56 $183.95

Cycle Standard Throttle Idle Cable OEM #56401-96 Harley Sportster XL 1996-Up +4 inch Extended
5 reviews $41.31

Performance Machine Classic 5 Spoke One-Piece Brake Rotor - 11.5 inch - Rear
$164.95

Motone Lecter LED Tail Light - Shot Blasted Aluminum
$82.47

Cycle Standard Handlebar Clamp - Finned - Chrome
$32.93

Lowbrow Customs Finned Thread-In Gas Cap for Harley-Davidson 1996 & later - Polished
35 reviews $54.87

Colony #3157-11 Buddy Seat Auxillary Spring Bolt Kit 1936-69 Harley Davidson — Colony #3157-11 Buddy Seat Auxillary Spring Bolt Kit 1936-1969 Harley-Davidson Big Twins - Parkerized
2 reviews $20.57

Cycle Standard Complete Rear Rubber Motor Mount Kit 2014-Up Harley-Davidson Sportsters
$164.20

Cycle Standard Bobbed Undrilled Rear Fender - 2004 & Up Harley Davidson Sportster XL Models
5 reviews $163.91

Goodridge 30346TC-CL Universal Braided Stainless Brake Line - 46" - Clear Coated
6 reviews $81.95

British Standard Handlebar Shims Reduce 1 inch risers for 7/8 handlebars Triumph #97-1425
35 reviews $18.18

Lowbrow Customs Classic Grips - White - 1 inch
24 reviews $18.10

Cycle Standard 3 Hole Chrome Derby Cover for 1970-1998 Harley-Davidson Big Twins Replaces OEM #60668-84A 253952-84T
3 reviews $27.13

Colony #9799-20 Front Motor Mount Kit Stock 1957-1984 Harley-Davidson Sportster - CAD Plated
13 reviews $40.61

EBC Brakes Sintered Front Brake Pads 1984-99 H-D FLT/FLHT/FLHR/FLTR 84-99 FXST/FLST 88-06 FXSTS 97-03 FLSTS 05-07 FLSTSC 08-11 FLSTSB
$54.14 $56.31

Cycle Standard Black Universal 3-piece Mounting Clamp 1-1/8 inch
7 reviews $20.30

Amal Carburetor Stay-Up Ethanol Resistant Float for Amal 928 / 930 / 932 Carburetors
6 reviews $54.13

James Gaskets Top End Gasket Kit 1948-1965 Harley-Davidson Panhead
2 reviews $40.59

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

Pingel 22MM Power-Flo Petcock - Hex Body - Brass - Inward
$161.95

Pingel 22MM Power-Flo Petcock - Hex Finned Body - Chrome - Inward
$161.95

Pingel 22MM Power-Flo Petcock - Round Finned Body - Chrome - Inward
2 reviews $161.95

Drag Specialties 18 Inch Narrow Ape Hanger Handlebars - 1 Inch Chrome - Throttle By Wire Compatible
$161.64

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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