The power vision will let you adjust it also.

 

 

so it would be best to get the old slide rule out, measure your tire diameter, get your final drive ratio, and take you r.p.m. and accurately compute your true speed?
all you really need to know is that your cruise does not work above 90 m.p.h.. as long as your cruise is working--you are not going too fast! next question.

 

what mileage warranty?

the way i understand it is that the gov will allow speedo to read higher than actual, but can not read lower.

 

Seems like every car and bike I've ever had read higher than the actual speed. My current SG is a consistent 3 mph higher than actual speed but, so was my last one and so is my Jeep. Maybe the manufacturers are doing this on purpose to avoid liability for....?

 

It also contributes to the ridiculously high mile per gallon claims you read about on this forum.

 

I reprogrammed my ECM to engage EITMS at highway speeds. Now I have a 51.5 inch thumper that gets 85 mpg on the highway.








Just kidding, of course.

 

Your true speed can easily be checked using mile marker signs as they tend to be pretty accurate. My Zumo usually reads a couple MPH lower than my speedometer.

 

My speedo reads 5mph faster than what I am going according the radar signs that are put up, not that I trust those either.

 

Just to put some clarity on this discussion and coming from metric bikes, all of the metric bikes are off between actuall and speedo readings for speed. I was told way back when that this was done on purpose to fool people into thinking that they were going faster than they really were. Now I know Harley used to have a speedo that said it was "certified" in small writing somewhere on the face. My wife's Sporty that she had said this as well as many other older Harley's I have seen. Those speedo's were calibrated to be dead on, at least when they left the factory. If you look at all of the new bikes.......none of them say that now. I beleive Harley has subscribed to the same non-sense that the metric manufacturers do. Maybe it's a "gubment" enforcement thing.