250r Cylinder interchange

[atc500x]

I have a 84 250r,the previous owner try to remove the head.....but miss to remove a nut.So....most of the fines on one side are broken,and the cylinder need to be bored.My questions is,which is is interchangeable with the 84 cylinder?Only 84 fit? or 83 and maybe 82 too...???

[KILLER]

there all the same , just differant colors from the factory . 81' through 84' .

[atc500x]

Same piston too? I check on microfiche and the piston parts # are differents...?

[smokinwrench]

Complete air cooled cylinder with fresh bore and piston were on ebay the other day that is my local honda shop, I know the machinist does great work.