I dont have mine yet. I will tell you I have a GO 5 port in my Truggy that has 5 gallons on it and I have only needed a front bearing after 2,000,000,000,000 total rpms it still straight up rocks.
My 7 port in the buggy too much power period.

Go 5 port ofna 086 pipe odonnell 77t glow plug and 30% odonnell
Go 7 port dynamite 053mr pipe 77t 30% od fuel
I will never use another engine but GO.