Hi Nick,

This is the correct disc... These are the dimensions of my disc also...

I did a little research and i came up with this info:

1989 RS250 use 3 bolt pattern 43122-NF5-760
1990 RS250 use 3 bolt pattern 43122-NF4-770 (mine model)
1991 RS250 use 4 bolt pattern 43122-NF4-870

1990 RS125 use 3 bolt pattern 43122-NF4-770 (as the 1990 RS250)
1991 RS125 use 3 bolt pattern 43122-NF4-770 (as the 1990 RS250)

The disc from what i check with Honda is on stock although i found a Greek manufacture that build discs and i said to give it a try... I have already sent him the disc and told me that it will cost around 45.00 Euros...

His internet site is this http://www.x-gear.gr/index.php?welcome=1&lang=gr&lang=en For anyone who wants to give a look...

Thanks guys for all the help again...
Michael