Thanks for all the help guys- all- I stripped them down and found that the head nut was a bit loose allowing the crown plate to slip and strike the fork shroud, plus there were a couple of bearinigs missing from the lower race. Have replaced, refitted, regreased and tightened up all round and the "click" is gone! However there is still a sort of bump as the suspension operates - I am not sure if this is normal operation bottoming out or not, but likewise also not sure what this could be after doing all the above- any ideas? Has anyone got a townmate for a comparison? All advice appreciated guys
Mike