Joined Nov 2019
320 Posts | 403+
Western Australia
I think what he means is that the PV4 takes a bit of effort to initiate the lean. You have to work to get it leaned over. But once leaned it'll hold that angle. It'll also want to return to the vertical more readily. This is most likely due to the seating position and mass centralization of the exhaust under the bike.
My 675 was the opposite. You feel like you sit above the bike and having the weight under tail exhaust kind of exaggerated this effect. It feels like it would readily tip into the corner with just a little input. R6 was similar. GSXR if I remember correctly felt low cg (you feel like you're sitting "in" the bike).
Correct me if I'm wrong, @Bruce Wayne.
Definitely helps return to vertical, makes big difference on change of direction, bike feels lighter, a bike falling on its side isn't usually a high COG but more steering angle and suspension settings, like if the front falls through the stroke mid corner, in my opinion the COG is the first step to get right and then build from there.