OK, did the conversion on a google site.
You can write this down in your manual, and keep it under your seat: yep, it is 25 psi in the front tire and 29 in the rear tire, just like my Like.
Sorry to hear about your experience with your dealer - me, I'm looking hard to locate a 'scooter specific' shop somewhere within 50 miles!
Some place where scooters are appreciated and scooter riders aren't second class 2 wheelers. I met a lady in the gorcer's parking lot last eve, she was riding a $7000 Yamaha scooter and we compared notes about our local dealer. They sell motorcycles out the front door and scooters out the side door. We are stuck with them in this town - and they treat her as poorly as me and her scoot cost almost 3 times what mine did.
We just decided to enjoy the heck out of our scooters - and keep looking for a shop to care for our rides.
Best of luck~!