I took my wheel off to change the tyres and removed the calliper so to get the wheel off.

After changing the tyre and putting it all back together I am finding that the throttle side disc is grinding on the outside face on the top 2mm of the disc. The clutch side brake is perfectly ok. The brake slider pins are working ok as well.

I cannot see anything obvious that is grinding so must be missing something obvious. Is there a 'special way' to mount the front wheel and align the brakes up?