Tory, my buddy has a 75 Sno Twister that runs great but falls off at the top end, titened secondary spring 1/3 turn-great hole shot but still falls flat up top , suspect the new aftermarket cdi? He does not like it when we line up and he gets the hole shot but l fly by on my 76 liquid Nitro! My lnvader starts bogging after warm and always got smoked when we line up-l just got another stator in it and need to button up and set timing yet then l think the invader will be a contender!