New to Comer C50 what is the Oil/Fuel Mixture?
The fuel you use, oil you use, and mixture will typically be determined in the rules of the organization you’ll be racing with. Check with them to verify so you can run and tune on the fuel you’ll race with.
If you’re going to just practice and burn laps then run pump fuel with 8oz/gallon to start.
Best if you can find fuel without ethanol at a place like a marina, or even a higher octane race fuel without ethanol, but pump will work fine just don’t leave it sitting in the carb long term.