So, I am more impressed now we get more of the story, not just a dyno run really is it

. Revving it to 10K will spread the load as well,as I am sure you are aware. Is the Trans completely stock?Or carefully set up and undercut etc? As to motherfuc$ing tough,???? I believe the gears themselves are robust, but there is certainly some issues, whether it is quality control or assembly. There has been enough issues with stock 125Hp bikes to bear that out. I have found, on the few gearboxes I have done that the shimming/set up leaves a bit to be desired.