So my simplex was running fine, then it quit. Pushed it back my shop and started the troubleshooting. It had plenty of gas ,but i changed the fuel filter and fuel lines, cleaned the carb. still wont start.  Then I removed the gas line from the tank and noticed gas was not coming out. My tank has two caps and is split, so I blew it out to see if there was any obstructions and it was fine. Refilled the tank and tried it again ran for a bit and quit again. The cap on the left will not come off and when I fill it up from the right I can hear the gas slowly filling the left site. So finally I realized that the right side is the reserve and when your low you lean the bike over to fill the right side. Correct ?? What is the reason for the two caps

Hello from Sarasota, Fl II

I just picked up this I think 1948 + / _ and need some help with locating some parts. Head Lamp, Rear Rack and a motor, but the one it has on it runs good. I would like to find something more original.
any suggestions

george k