Just digressing a little, but there were several comments about the change of tire correcting the speedometer accuracy. I find that very interesting. On my 2002 GL1800 (and my earlier 1999 Valk) with OEM size tires the speedometer was always about 5mph faster than actual speed at highway speeds. I would compare it with GPS true speed and we would always talk about Honda speeds vs actual!

However, with my 2016 F6B with OEM sized tires (Bridgestones and Dunlop E4s) my speedometer is VERY accurate to the true GPS speed.