[alanmcorcoran]

Try the suggestions (4th gear, higher rpms.) You have to get used to having the bike really wound up at high speeds - that's its happy place. I don't think there is an official book on what's considered abuse, but I think the majority of readers on here ride 60-65 regularly. There was one guy who rode his WTFO all the time and i think his piston eventually blew up, some of it is probably more due to how you GET to the 65 rather than the 65 itself.

A clean steady incline, plus a little headwind, *will* take you out of 5th gear and into the 50's (or even lower!). Learn to only use 5th on flats or downhill.

I think your bike is bahaving normally. You just are getting used to the freeway speed and it seems a little poky when you go back to the surface streets. Don't expect much in the way of acceleration out of the GZ. It's more of a slow and steady bike. You can make it a little zippier if you wind it out a little more before you shift, but, really, it's best to just let it be what it is. If/Once you get the big bike fever, you'll be getting something a LOT quicker if that's what you want.

Meanwhile, enjoy the lightweight, low operating costs and the gas mileage.