I have just checked the tyre pressures on my GT. As I haven't had it for long, I stupidly assumed the service carried out prior to delivery would have involved checking them also.
As I've grown more comfortable with the scooter I felt that the front end wasn't as "robust" as I would of expected, turns out the pressure was about 1.2 bar! The rear was also quite low.
Now that I have set them at the factory recommended levels ( 1.8 bar front, 2 bar rear), I have encountered a shudder through the drive train on take off. It is only mommentary and doesn't effect the ride, however, I'm concerned that either the pressure in the rear is actually too high or coincidentally something else is the matter.