It's about time for another top end on my '99 YZ250. This time, I was thinking about sending it off to Eric for some porting. I've looked at his web site and read about "power bands", but I still have some questions. 1) Does Mo Betta porting mean racing gas? (I use Chevron premium, and I'd like to stay with that) 2) Anyone (Eric?) done a dyno tace of a stock engine versus one that has had the Mo Betta port job? 3) I'm really not looking for peak HP (got penty now), rather a nice broad pull from the engine. Don't really like the bikes that "hit" really hard either. 4) I'd like an engine that "carburettes" really nicely everywhere.