Are any of the lock sets ie Ignition, fuel cap and seat lock from later NC30, 35 or any other models for that matter compatible with the 1987 NC21?

I would reckon that there would be some chance of compatibility with NC24 and maybes RC24 too. possible that the CBR600 jellymould might share some

Fuel caps can be fairly generic and I don't doubt you could make almost anything work.

Hi thanks for the reply, been looking at part numbers and it is fairly generic as you say, got a complete set on fleabay for £31 (chinese)

Good to here :) £31 isn't so bad