[PeteKz]

I may be wrong, but when I traced the wires on my SC engine, I found that the wire to the air control unit that grounds, controls the CDI rather than the fuel pump. If it's not grounded, the CDI stops working. Maybe it cuts off both. But be sure your CDI gets that ground too. I wouldn't try to simplify the old wiring, but I'd make a new wiring harness and keep the old one for reference.

And if you remove the CSV, then the chain case temp/time switch becomes inoperative too.