Nice fall Mr. Doug...pun intended...I am enjoying the comments on tuning, not critically of course just enjoying the conversation...the video has your signature....
The issue is it is ported kinda hot and hits the rev limiter quick. My ported 7900’s do this too. I’m a firm believer that both saw models were fitted with too low of governed rpm coils from the factory they’re just begging to rev higher even stock. My 7900 racer has unlimited coil and it does so much better. The more I lean it out quicker it hits the limiter. That’s not 4 stroking you hear.