Maybee this helps, from and older topic:

Before fitting the 150's Reyer fitted the 140 with 750 Monster settings (found on the internet). With CO measurement equipement making the best setting.
Them Reyer took the Paso to a dynorun


With tis as a result:

Reyer thinks the engine still run to lean. So he will put back the 150 jets and tries to solve this. 65 HP on the backwheel must bee possible.

If they show MPH/KPH it usually means that they didn't have a place to hook up the sensor for RPM or they just didn't do it. In my area you can get an el-cheapo dyno run like this for 10 bucks. Very little set up but not much useful information.

They use 4th gear so that the engine has a nice long pull for the dyno to measure.

That's an inertia dyno so I'll take a couple guesses at some of the questions asked:

Plotting the output vs mph saves them from instrumenting the bike or having to get any data from it, such as gearing or tire diameter. Note that knowing the final drive ratio isn't enough to know what the corresponding rpm would be. Take that, measure the tire diameter, and you've still missed the tranny's gear ratios and the primary drive ratio.

MPH can be taken from the speed of the roller - that way all instrumentation is on the dyno itself so there is no added set up time or complications getting a tach to work (accurately) on different vehicles.

They might run it in fourth gear to keep the rear wheel from spinning under power. In any case running it in fourth gear makes it a little less violent of a test. In 4th they aren't going to spin the roller to 200mph nor are they going to go from idle to redline in half a second.

EDIT: Yeah, what he said. I guess I type too slow! :laugh:

Your answer must be better, you used 2 times as many words!!

Great minds must think alike!