the 975 big bore kit has seizco pistons, I wouldn't do it. call Terra Alps Racing
they have a good porting and head set up for it, they also have 975 pistons on the shelf with 400 miles on them that are toast. so unless you want to change pistons every 400 miles do the porting and head kit. with reliable stock pistons.
Funny the peanuts in M&M's always still look like peanuts when I'am done with them.:dI'll just stick with my m&m's for this ride...tired of popcorn farts :d