Perhaps it is the SAME bike, and these are readings from two different dynos....
and THAT would be correct!
So one might wonder what the point is. Simple, actually - - to dispell some misconceptions about the infallability of dynos, and the mistaken thought that we can tell which modifications are better than others when the testing was done on different dynos.
The bike used here is in the exact same state of tune on both, yet one dyno clearly gives it a strong edge of 5-6 hp for the entirety of the comparative run. In this case, the bike is the standard that the yardsticks (dynos) are held to. Which dyno is closer to correct? who knows... all we know is that they are clearly not measuring the same.
To me, this is important info because often we make farkle choices strictly by the dyno chart This can still be done, but to give viable info the modifications need to be compared on the same bike, on the same dyno, and in as comparable weather conditions as possible. Then compare the
percentage of change. This should give a more clear view of the actual performance changes achieved. we need to get away from just looking at dyno charts and seeing which shows the highest hp or TQ... and buying that product. If the measuring devise isn't constant, the results are just not reliable. Steve