In the graphs above from Tal there is a mismatch in scaling. On the left axis is PS instead of HP. This is a metric Japan scaling, coupled with an SAE correction factor which is imperial. I am not sure exactly what that would do, but am sure it will read differently. Also I have the newer Winpep 8 dyno and the one above is the older Winpep 7. I note as well, that the Win7 graph is correcting the value down by near 3%, so either it was a super good day weather wise, or his weather station module is not working well. I used to have to replace mine about every couple of years with the older dyno. PITA. I have rpm on the lower axis, Tals guy has speed. I have snuck the limiter up, which has not been done by Tals guy, so this gets me a better top end number as well. The bike I did in that graph was just a de-restrict/tune, no parts.