This site exists because finding parts for vintage SOHC Hondas often means digging through years of forum posts, dead links, and half-remembered recommendations. This is a curated list of suppliers and resources that enthusiasts consistently point to — organized in one place — to save searching time, and give you one resource to bookmark. It focuses on Vintage Honda motorcycles: CB / CL / SL Twins, SOHC Fours, plus a small section for CT trail bikes, Minis & Passports / Super Cubs. I do not sell or drop-ship parts.
Classic Honda Restoration - Specializes in parts for 305 Honda motorcycles - CA72/CA77, CB72/CB77, CL72/CL77.CMSNL - Huge inventory of OEM parts, should be considered a baseline supplier, but a good one that's crucial for for parts diagrams & part numbersCommon Motor Collective - Awesome place for Honda Twins - CB175 / 350 / 360 / 450 and the CB550 Four.David Silver Spares - This link is for the US based warehouse / supplier. Good selection of genuine and remanufactured parts - including some raritiesNOS Parts Now - Often premium pricing, but sometimes the only option for very specific NOS parts in a pinchScrambler Cycle - Not a ton of personal experience here but well regarded on forums, and sometimes has a key part or two you can't find anywhere else.VintageCB750 - Really good CB750 specific resource - based in Canada but ships fast and cheap to US.Yamiya - "Overnight parts from Ja-pan"z1 Parts - Big in the Kawasaki scene but a cool collection of Honda parts - another great place to search for that 1 hard to find item.4into1 - Large selection of parts across many models. Ships out of CA. Great when you need a mix of OEM and Aftermarket / Replica parts.
Spokes & Rims: Buchanan's
Bolts, Screws, JIS Fasteners: Bolt Depot or Bolts & Nuts
Plating & Tank Sealing: Caswell
Molded Rubber Parts & Tank Emblems: Clauss Studios
Wiring, Terminals, and Connectors: Cycle Terminal or Vintage Connections
Fork Tubes: Frank's Forks
Electrical Doodads and Custom Wiring Harnesses: Sparck Moto
How-To Books & General Info Blog: The Motorcycle Project
CTTrailBikes
DrATV
Northeast Vintage Cycle
Treatland
TrailBuddy
Vintage Honda Mini Trails
Places you've probably already heard of, but are sometimes the easiest / fastest options
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Partzilla
Dime City Cycles / Randakk's
Interesting trove of S90 Information: Barney's Journal
Info about S90 parts over different sales years: S90 Parts Puzzler
Misc Restoration Info: Vintage Bike Builder
Maintained by a vintage Honda owner & enthusiast.