Coincidentally I just took the bike to at least 160 km/hr. Perhaps 170, as I kept accelerating. By the way, I truly am not a fan of these neutered 80 miles speedometers!
I was with a passenger, and the rear shocks set to be the softest as like that I'm trying to cheat my way to have the seat lower. All the bearings on my bike are brand new, and I think the air pressure in both front forks and rear shocks is good (I haven't checked in a long time).
I am wondering what you mean by 'wave'. The bike behaved differently from what I'm used to, and that's due to being much taller I assume. But I wouldn't describe anything as a 'wave'. I have a Vmax with much bigger offset than yours, and no wave or any problem. And it's true - some bikes come with offset by design.
The KZ1300 feels different when cornering even at slow speeds due to geometry, and it took a bit getting used to it. 0verall, it feels like it wants to stay upright so I try harder to lean over. In straight line it seemed stable, but honestly I can't say anything definite considering the wind factor, passenger and it was just a short burst.
I'm wondering about the air pressure in your forks. Are the connected or not? Are they equal?