I had forgotten to mention this but when I was buying the bike, I had noted a very rusted looking part on the bike... The mechanic I took the bike to to take a look over it also noticed it and suggested the bike had been around the coast (I guess he was referring to the sea salt affected air near the coast rusting the part faster than usual)...

I am unsure of the name of the piece that is quite rusted... I checked the parts manual page and I found it in the following area, 1988-1989 --> NSR250R2J/R4J [R5K/R5K-2] --> Fairing F32-1, marked as part number 13, although I am unsure as to whether the part number for part 13 matches what is on the diagram. I believe the part is either called the meter stay or fairing stay. I am not sure which, if either of the names are the correct one.

I will try and get a photo up as soon as I can...