I should have added that the shorter top wishbones will lead to increased negative camber angle on compression of the suspension in cornering, as it increases the "unequal wishbone effect". Whereas I can see the point of this for those still using the Avon sidecar tyres, which tend to suffer from "tuck-under" in hard cornering or using rounded profile racing motorcycle tyres, I see far less benefit for folks like me who are using the flat tread and stiff sidewall, car competition tyres, like Excelsion Comp H or Blockleys. These don't in my experience suffer from "tuck-under", so an increase in negative camber in cornering roll might have an adverse effect on adhesion.

Wilson