I have been adjusting the preload on my Tora 302 (coil) forks and I noticed that some times it would be quite hard to turn but could be sorted with a pair of pliers and a cloth. I adjusted it a few days ago and noticed it was completely seized and even using pliers and a cloth could not turn it. After using the pliers and a cloth, the whole thing started to unscrew and now have the preload adjuster knob off the forks but still can't get the adjuster to turn.
Any idea what has caused this and can it be fixed ?
If I need a new preload adjuster knob, where will I get one ?