I've got a sport 1100 carb, the forks poke through 11mm standard, but I dropped them through to 25mm. This quickens up the steering a bit but the thing to watch for is the side stand. And not anything to do with dragging it on the deck, the issue is that it is unstable at best but when you lower the front of the bike it becomes diabolical. What were they thinking! Anyway, I fitted a sidestand to the porkchop, set the length of the leg to support the bike at the right angle and now I can raise or lower the forks to where-ever I like, lower is definitely quicker.