the plug was normal after i spent about 4 hours the other night trying to diagnose this thing i havent checked it today
the carb in the video , is the carb off my running bike ,choke has no effect what so ever on it
but in the video it was running with the choke on..
airscrew at? how many turns now and while your trying to rev it. turn the screw a 1/4 at a time and see if you can get to rev clean.