I agree with most of what you say BUT AS SOON as the sprockets are changed, the TRUE SPEED in relation to RPMS WILL CHANGE..
IE, if you could put a 50 tooth front sprocket on the engine, RPMs WILL BE LOWER FOR THE SAME SPEED, more chain is being pulled, thus spinning the rear tire faster...
You know as well as I do, change a sprocket #, the speedometer will also change. Put bigger tires on a car than stock, the speedometer READS LOW...
But that's not what he's pointing out. . . . if you held the bike in the air and tried a 15t, 16t and 17t front sprocket, what would the speedo report with the REAR TIRE IN THE AIR i.e. OR NO DRIVE CHAIN?
<< It should be the same for all gear sizes NO MATTER WHAT; Right! That's the point of this thread. It's not.
But there's a small errors in calculation and its making it look like a big factor. And when I say errors in calculation I mean ECM algorithms for RPM and Speed.
If Yama made 15t plastic one, I'd test the the other spectrum for MORE ERROR!!! :rockon:
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