[Bruce00]

ORIGINAL: alazlo

It depends on who is running the dyno as well as three dozen other conditions to include temperature, humidity, altitude, how hard the back tire is, how tight the bike is tied down, and whether or not the operator stands up when he makes the run. When we installed a dyno at the dealership I worked at, we were told to expect as much as a 10% difference from one dyno to the next. With 100 hp that's the possibility of ten horses difference. It's a fair bet that you're gonna get higher dyno numbers from the folks who built your motor than you are gonna get at bike week.

Excellent post