Cinnamon Girl's got funky in 30 degree weather riding home from the Arkansas rally last year. She is a very fast beech too. 5 miles per hour while on her sidestand now, and a consistent 10mph over the real speed when underway. odo is spot on. And having a tach, I don't need a speedometer, although I would like to have one. (I do have a spare speedometer but installing same would ruin't my mileage count.)
Cold weather and speeds above 85 mph were the primary factors in Cinnamon Girl's speedometer unintended recalibration...brrrr