I have a bit of a long question, I have a 1987 js550 and I would like to try to get more power out of it without doing a full 650 swap. I've seen different kits online for a 750 that would take it to a 840. I was wondering if something like this could be done to a 550 by boring it out. If so what is the max that it can be bored? what pistons could be used? and what would the approximate gain be? I appreciate any replies to this question thank you.