Café Racer Wiring - BikeBrewers Sep 04, 2015Building a café racer means that you strip your bike down to only the necessary functions. The stock wiring harness is one of the things you want to strip down to a minimum. If you take a look at your workshop manual, you can see that the original wiring looks extensive and complex. Wiring Diagrams - oldmanhonda Wiring Diagrams. Here is a selection of wiring diagrams taken from my collection of manuals that may help get you through your electrical problems. Honda CB350 Custom Wiring Problems - Tech Corner 1970 Honda CB350 Custom Wiring Problems. Q: I’m building a 1970 Honda CB350 custom with bobbed fenders, Superbike bars, painted wheels, etc. I’ve put in new rings, rebuilt the carburetors and so on. I want to ensure the bike is dependable, so I have tried to update or replace with new all the items I can.