Im looking to adapt a biturbo 2 piece exhaust to my peugeot 102 with a 49cc cylinder. All the info i can find on the biturbo two piece mentions that it is designed for a 70cc cylinder. What impacts will this difference have in performance? I dont have a ton of experience with 2 stroke motors, but in the past when I have toyed with them I was told that tuned pipes are designed with a specific motor in mind. I dont want to just slap on something and hope for the best; I want to ensure that whatever i put on will work well and not hurt performance.