Tekno Help

[DOE BOY]

hi guys can yall help me PLEASE i have a revo tekno kit and i know i should have went with RCMONSTER MIKE KIT but it was a gift . anyway i have a neu 1512 3df motor and am useing 4s and a mm and this thing is a pig its lazy can someone help me with gearing with the tekno clutch system..... when i put my 8l in the truck its ok with 40/16 but not with the neu motor and i know the neu is a much better motor than the feigao ..