I have been running the 3 port race since Feb 1st, and to this point i am very happy with it and plan on running it till it pukes, the bottom is softer than the 5 ports but still has enough for me, no trouble pulling away from other motors out of the turns. For buggy it's great good smooth powerband all the way to full revs, to really see the top it can put out the 086 has been working very good for me, I'm running the 8 mm carb insert, you will lose some top going smaller but your runtimes will go up. Overall i'm very happy with it, i was a little cocerned at first but now the motor has 3+ gallons on it and it's winning races for me at our local track against all the big names, for the money, it's well worth it.