RobH wrote:Some oem items are still available
https://www.cmsnl.com/honda-nsr250r2-1988-j-japan_model49608/partslist/0210.html#results

Thanks!

Weirdly though they don't seem to have any that are 5mm. I believe the correct ones are Part 16, which don't look right at all. Do you know if they were originally 5mm? The ones I have certainly look original and fit perfectly.

Thanks