I have an 89 LT250R and am getting to the end of my bore limit. I want to bore the cylinder to the maximum and them nik plate it. I hope yhis will save me from having to re sleeve and go to a smaller bore. Every time that I have to rebuild I will just have to hone it and order new rings( if this is possible)
I need to know what the maximum is please!

 

According to wiseco it's 69MM. Even if you Nikasil your cylinder, when you do need a rebuild you will have to renikasil it it I think.