Nope, 5 Before is wrong at idle. It should be 5 AFTER at idle, and 25 Before at FT.
Remember to slack the setscrew at the carb before setting the timing, the rod can pull the timing ring further (not an enduro)
Your mixture screw should start at 1+3/4 out, BUT be very gentle when bottoming it for the setting. Let it idle for 5 minutes after a fast burn, then kill it and read the plugs. Ideal should be the bottom one a bit rich, and the top just on the rich side of brown. Back to timing, adjust the bar at the top first on FT, then the screw for idle setting. The poor fule in the Caribbean
and elsewhere contains other impurities. Bank on changing the idle jet every 2 years. Its a small hole, and even the slightest erosion is a huge difference in %. Your last setting is the idle screw on the carb, make sure its not touching while setting everything else. Best little engine out there!