Hi,Wayne! Here's the best way to tell your true speed.Find a flat stretch of road with mile marker postings.Go by the marker at exactly 30 mph and click your stopwatch or mark the seconds on your watch at exactly the point you passed the marker.If you hold the bike at a steady 30 mph(it takes concentration but it's worth it)you'll pass the next mile marker in two minutes.If you feel like going on,go to the next marker keeping it at a steady 30 mph and of course that will total 4 minutes.When you do this you can also on the return trip check your odometer because they're not always off the same percentage as the speedometer.Now say it takes you 126 secs. to run the mile.Then your speedo is off(registering too fast)by 5% I think.You just have to figure the percentages.BYE!
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