If the bike makes 192 to 205 RWHP its probably a 1397..if its a stock CC stock compression GEN1 it should make between 148 and 160, if it has some compression increase and bigger cams, then 160 - 180 or so...thats a ballpark, but the best way to tell is to take it a part....You should also run a compression check to see the cyclinder preassures...13:1 will give you in the ballpark of 255 per cyclinder.....a stock busa would be between 180-200 pressure readings....