I am running a race this weekend that is doing 8 minute qualifiers, I am trying to figure out the best course of action to make 8 minutes. The best I have been able to do is around 7, maybe 7:15.
Here is my setup:
MBX-7R
Keep-Off 21-4
9901ss with 41021
I had the 6mm restrictor in the carb, I have now swapped to the 5.4 but haven't run/tuned it yet. The motor has about a gallon and a half through it since new.

Doing a search in this thread, there are some old posts with guys getting 10-15 minute run times, I am nowhere near that.

If I do stick with the 5.4 restrictor, what should my tuning strategy be to start? Just lean the crap out of it?

Thanks in advance.