You'll want to engage the clutch around 3800 Rpm, For a 1/8 th mile banked that makes descent momentum you'll be ok starting with the 14 driver but pull 10 teeth off the rear to start, put a 62 on it, might be a little low depending on momentum you can carry so have 63,64,65,66, rear gears along just in case, If your set up and tires are close and you make good momentum you'll need a 61, and 60 rear gear as well, that gearing is for 35 chain by the way, For Kart Racing take that 72 off and don't even take it along to the track, in fact anything bigger than a 68 leave at home with it just have a better selection of front drivers 13 thru 17 at least.
Good Luck !!