I've been running a 5 port standard plug and have a little over 4 gallons on it. I used to get about 8:40 minutes indoors on a super smooth high bite clay track in the winter with air temp around 40f. Now it's summer on lower traction and I couldn't get 6:30 mins. until yesterday.

I put in an OS A3 plug, and 7mm NR restrictor and brought the temps up to around 250. I now have a motor that I feel comfortable pittting once in a 15 min main. I don't feel that I lost anything much on top and it tamed the wicked bottom.

I simply don't believe anybody's claim of 11 mins. on these motors outdoors in summer. They are great but not magical.