new combustion chamber volume is 9cc+/- .5cc
thats a stock 50cc head, with a 14 degree squish band cut until the outside of the band is at 45mm, id of squish band is about 32mm=~50% of bore area
Stock compression ratio was around 8:1
New compression ratio is around 8.8:1-9:1 depending on how much the gaskets squish down.
These measurements and volumes are approximated and im probably wrong with most of them but so far everything seems to be playing well together