I have a 2005 KLX250H which when I bought it came with a new genuine Kawasaki 300cc big bore kit that the original first owner bought and I am fitting the kit. Has anyone had experience in fitting the piston rings. One of the compression rings has RN on it and the other has nothing. The only manual I have is a PDF of the 1996 KLX 250R and that informs me that those rings have R on the top ring and 2R on the lower ring. Those ring have different profiles but my rings profiles look very similar.

 

Post your question in the KLX250 section. Someone there will most likely have answers for you.
https://www.kawasakiforums.com/forum/klx-250s-71/

 

Cheers thanks for that