Timing issues

Keep the settings the same and advance the timing. If the RPM picks up, you need to keep advancing it until it doesn't pick up any more RPM.

Advance, reset carb to idle rpm, advance... until it doesn't pick up any more.

Bump it maybe 2* at a time.

Max initial without run-on or kicking back on the starter is where you want to be.

That cam should be able to idle under 1K