Welcome Kymco Owners!
a rarity, I checked and set my pressure before a ride 34½F and 39½R then rode to my local post office and back 3 miles each way, rural paved roads. pressures were up to 39F and 42R on return
Sounds normal to me. Hot psi is always higher than cold psi. And is also not consistent how much higher for the miles. 6 miles is plenty to warm up tires to operating pressures.
something more to consider...from Dave Moss Tuning...a video on proper tire pressure setup ..he says the pressure listed on the sticker is all wrong!
You must have hit "back" on your browser window and returned to the edit page. Your link is only to the edit of the post you linked to.I think this is the video you intended to link.