E-Kart build and battaries???

So I built my first E-kart this month! I was to get 35-40mph but i want to go faster!!!
My current specs are
Alltrax AXE controller 42v
Motenergy 42v motor
and
14s12p 2200mAh Li-ion pack

I want to start my next project with a go-kart that will reach 60mph.
Any suggestion on controller
Kelly or Curtis?????????????

Any suggestion on motor?????????
D&D , Motenergy, or something else????

Batteries?????
18650 2600mAh
18650 1600mAH HIGH Drain
A123
22650 3.2v 3300mAh
3.7V 8AH LITHIUM POLYMER BATTERIES 25C 200A S

Please help me decide!!!!