Need Pistons/rings

[chuck booth]

I need a set of oversize pistons and rings for my '82 xs400RJ Seca. Anybody know of a source? Already tried Speed & Sport - they only have a set of pistons and do not have rings to match. I have already honed the cylinder once and replaced the rings with stock size and after 5k miles am down to 115 psi in both cylinders. Any help would be appreciated.

 

[amc49]

If the valves and especially the exhausts are leaking it may not be the rings. A bigger issue too may be getting a good bore job, it is fast becoming lost art and many shops that say they can do it are absolutely incompetent at it.

 

[chuck booth]

Yeah, a leak down test may be in order here. Valves are not any easier to find though. But al least you can have them machined from blanks.