hi,
My chain is completely rusty on the inside and as you know its a bitch to access for cleaning. I have read in the Haynes manual that to remove the chain I need to take off the swing arm and that requires a special 'tool' from Honda to refit.

Is that true? If not is there any easy way to remove, clean and refit/replace the chain on a NC30?

Grinder!

i use a split link, but others use rivet link, if its old and tatty cut it off with an angle grinder.

or buy a chain link spliter (EXPENSIVE)

REMOVING the Swingarm is extreme!