My 8 y.o. daughter will be running a jr champ (295# scaled to percentages) this year with a green plate little pipe clone. She ran a predator last year for a few races and did great. We are running a 1/5 mile dirt in PA. Pinks and blues. engine builder wants it to turn 5400 - 5700. Running a flame clutch. Just wondering where to start with gearing and where the clutch should come in at. Thank you.