Keep in mind as well regarding cams that the profiles are pretty different between the 270* and the 360* motors. As for the 360* motors it's the difference in the amount of overlap that defines the higher hp for the 790 motor.
In my 790 I advanced the exhaust cam 1 tooth to achieve a "inbetween" overlap figure. I see no reason that the 865 engine couldnt benefit from a inbetween overlap figure as well by retarding the exhaust cam 1 tooth.
I'm suprised noone has tried this.........
