It is a shame this thead died . I found a couple of 2 stroke threads just like it that are still going strong . Some of the guys in them built Aprillia MotoGP 125 and 250 motors and are pissed at Dorna for killing the 2 stroke , and are telling all . Google searches will bring up Jan Thiel and Frits overmars . One site is French and the 2 part thread starts in french but switches to English . Another is on Kiwibiker.nz works engine tuner . This stuff ties into standup jetski porting for me , and make me want a 2 stroke track bike .