Playing around and put the OEM carbs on with the air box. Runs good, but on a hot re-start it will barely idle. Starts at like 200 rpm, sometimes have to crack the throttle to get it going. Then after running for several seconds it climbs up to normal idle speed and everything is fine. Screws are at 2 1/4 turns out, and air/fuel meter is showing 13:1 when idling normal. During the hot start problem it's showing lean.
I'm no expert, but my guess is the BS carbs are jetted way too lean for the engine setup, and the air box is significantly restricting air flow.
Kinda like wearing a stupid Covid mask while working your a$$ off.
I'm thinking about putting the idle mixture back where it should be, and run it on non-ethanol gas from Home Depot. This would prove the issue is with the lower boiling point of the the gas with ethanol.
I'm also gonna check temperatures after a hot shutdown to see which is hotter, the carb bowls, lines, or fuel valve? I have a chrome Pingle valve which is close to the head.
Has anyone else been having heat soak issues? I know it's been an issue for awhile. Especially when they're still pumping winter blend fuel in the hotter months.