I have 2008 ktm 144 sx been riding for over a year check the compression reads 125 psi still runs good should I do any thing or just keep riding

Ouch, I usually replace my rings at anything lower then 150psi. I'd warm the bike up and then try again... perhaps its just a bit cold out there to get an accurate "cold" compression check. But yea, 125psi is low enough to need rings, but I'd just throw a whole new piston in there because it probably needs one.

That was cold I will try it hot