hi to all, new gxii fully ran in and goin fine,just wonderin what are the run times of this new engine? currently running engine with its original carb and a go 2072 pipe, and o donnell 97t plug, currently gettin round 9 minutes from a tank but need a bit more! we have an event next month on a track im not familiar with and heats are all 10 minute runs, no problem to the guys who are expert at this but im relatively new to the sport so it a bit of an ordeal! the track is hard packed and fairly open with big sweeping bends , i have a go gx7port also would this be a better choice for the day? any advice welcome on how to tune either engine for longer run times,regards jason