it wiggles like a mo...fo...!
i'm just back from a day's test ride, to get to the bottom of the issue.
here's what i figured, wind blast baby...when overtaking, i think that i get on the backdraft of the thing infront of me, as soon as i open left...boom! it just moves left and right, of course all this under heavy acceleration...(it was particulary windy today )...
now, here is the problem,...it happened again when hitting a hard 90 to 135/140 roll on...
downshift, hit it and then...the bike just wiggled left and right, not quite a tankslapper but yes, it was very present... i repeated the experiment several times... and it does not happen every time, it might have to do with the road surface? body position? i'm not sure.
all test were perfomed by a professional rider on a closed course