My son and I have been playing with this stuff for over two months. He bought a new quick fuel e85 750 but we are having a stumble or hesitation problem when leaving.It's driving me crazy but I'm not giving up.Only way I can get it to leave is make the idle mixture screws rich as hell and opening the rear transfer slot about double compared to the primary.This is a drag only effort.I haven't tried removing the power valve but leaning this way for Friday tnt.
Combo is 416
12.72 compression
Trick flow top end
Flat tops
3070 lb race weight
4.10 gears with 29" tire
8" converter
Anyone have this stumble problem and found the solution?
Son told me last night that local gas station in Maryland just tested 87% and that's the first this year.
