I am also having a hard time tuning my 7 port
It feels good the first few minutes but after few more mins it starts loading up and boggs at full throttle
I have to pump it to make in not bog for one lap and then again it loads up (high reving)
I have a dynamite 053 pipe
What can this be? The engine is about 2 gallons old
tried the settings griz posted but it still does the same, no air leak, new odonell 097 plug

If I cant fix this I will be breaking in the 3 port
What pipe will be good for this 086 or the 053?
what are the best settings for this motor?
Thanks