Servicing RAVE Valves HELP- Picture included

[kramster]

So I had oil spitting out of both RAVE valves on one of my engines so I decided to go under the knife and check the Bellows/clean the Valve. When I went to go re-install I noticed the top of one of the bellows was different. I removed the caps from the other engine and they both looked like the one on the right. Although, the one on the right did not have a 10mm bolt on top of it and it also looked melted.
So to recap- The one on the left is the only one that looks like that, however the one on the right did not have a 10mm bolt on top. Both rave valves on the other engine are in perfect condition and look like the one on the right in the picture below.
Where do I go from here?

 

[Biffitis]

That plastic piece is the piston that helps to lift the valve out of the way at high RPM. If it's melted it needs to be replaced, but before that you need to figure out why it melted.

Was the valve stuck closed with carbon?
Was the bellows ripped or leaking allowing hot exhaust gasses to circulate through?
Is the valve and housing badly worn? (see this link; http://www.seadooforum.com/showthread.php?62695-Worn-RAVE-Valve-PICS)

 

[kramster]

But why does the right one look different then the left one? Yes the Valves look similar to those pictures, I cleaned them pretty well however. I think they need to be replaced though because the 2 slots in them are not very straight, they have some warp to them. The bellows do not look ripped or leaking, but there was oil spitting out of the RAVE valves and a very strong gas smell.

 

[kramster]

Is the one pictured on the left the newest version of the piston?

 

[Dr Honda]

The left one is a factory unit... and the right is probably an aftermarket.