Yeah, I'm guessing only 7.5-8:1 compression. That's why I want to get those base gaskets out of there.
According to the specs, they are probably only 7.25:1.
Sounds stronger in the thumps. Probably the higher compression that you did.But the chirping and difference in sound of the cylinders is not good.It's not fixed, but it might limp okay for a while.
I agree Tom. The left exhaust pipe sounds much more aggressive than before. I assume that "chirping" noise is the flame burning past the valve seat? It does not do it when just idling after it warms up a little bit and does not do it when cruising at speed, only under load. I do want to replace that valve ASAP, but being that I've heard that noise for a while now and there wasn't any noticeable damage to the head I think I'll be fine for a few more rides. Yes?