dunkenb wrote:Ah its coming back to me.
When i first had the zxr forks i was using mc 18 calipers and had the fork bottoms machined as the discs were as yours are in the calipers , but when i switched to mc28 calipers this needed them to use a spacer as they fit the other way round! Sorry i was being dull earlier.

So you need to have a couple of mm taken off the caliper mount (0r the caliper) on the fork to move them out and centralize the disc.

The vfr discs size was right on for zxr forks, but i did try it with the Nsr discs first and they only touched 2/3 of the pad like you're discribing.

Hope my rambling helps.

Just had the bike in to an engineer who is going to make up some brackets to reposition the calipers via a bracket. The calipers will end up sitting lower than they are now, but it hopefully should work.

Did a bit more research and it seems that different models of ZXR400 took different sized rotors (300 vs 310mm). It turns out my 296mm VFR discs may be about 14mm to small, whereas yours would have just fit in right. So my options are to make a bracket, get new custom discs machined, or revert back to the original forks. The bracket is probably the cheapest of these options. When I need new discs I guess I can have a custom set made up.

What a nightmare!