Newbie 318 piston question

Max1196 said
George those compression ratio factors appear to be for the KB167 not the KB399.
View attachment 1715565181
the KB399 is more along the line of 12.2 to 1 with 57cc and 10.4 to 1 with 68cc heads!

Max, that seems to be more in line with the 1.81 ch of the KB399.

Here is the article I posted above from CNC-Motorsports about the KB399, could be a misprint . . easy to get them mixed up when they are publishing info.