So, I've been fighting SVS recently. Finally found some Deep Creep Sea Foam and did a big treatment on her. Pipes off and everything.

When I pulled the pipes, I noticed the left rear exhaust valve stem had about 3/4 of an inch of shiny on it, like it was pushed way in. The right one didn't, in other words, it was dark and discolored (not totally carboned up though) and looked like the other three. I didn't think to try to manually move the left valve, I just sprayed like crazy and let it sit about five hours.

Now, the bike seems to run ok...I guess. Truth be known, I've been blasting around on it so much, revving the piss out of it to hit the limiter a bunch, that i sorta can't even tell if it's got all its power back or not. Blew most of the packing out of the baffle and so it sounded weird from that. Now the weather's bad so I don't know what it's going to run like when I get to ride again. Man, what a mess. I'll never go rich again!!!

OK, here's a SERIOUS question. Could I have bent a valve? Is it possible in all this revving and wailing on it to blow the carbon out that the valve stuck and the piston hit it? Are these "interference engines"? I'm worried because, while I've been out thrashing her she seems to start to run like normal again, but not quite. The idle is really uneven....like "potato potato" with a heavy accent. And the power....well, I dunno. I think it was faster right after I ported it the other week, and now it's just sorta ok. Thoughts?

Mike