Why will your ttr-50 only run with the choke on?

If your TTR-50 only runs with the choke on, it likely indicates a fuel delivery issue, such as a clogged fuel filter, dirty carburetor, or a blockage in the fuel line. The choke enriches the fuel mixture, compensating for insufficient fuel reaching the engine. This condition could also point to an air leak or a problem with the carburetor's adjustment. It's advisable to clean the carburetor and check the fuel system to resolve the issue.