RAVE replacement-one or both

[MinnesotaBrian]

I have a 1997 XP. It was running very rough. I found one of the RAVE valves was not threaded into the plastic Piston Exhaust Valve Cap.
It wore down the threads on the RAVE. I need to replace both the RAVE and Cap.

Is it ok to replace one RAVE or should they be replaced in pairs?

 

[mikidymac]

If the cap melted it's from the o-rings being bad.
The cap is plastic so I don't see how the metal threads could have been damaged.

You do not need to replace them in pairs to answer your question. If the cylinders were bored then you need to trim the new valves so they don't hit the pistons.