So I just installed this thing two days ago. I would have preferred to go with an iron Malossi, Polini, or DR but someone offered me a trade for a part I had for sale so I figured what the heck; give it a shot.
It's running reasonably well. No low end power at all, but I'm still running stock clutch springs and variator weights.
The problem is the noise! Anything under maybe 5k RPM and it pings and has a high-pitch chime. My timing is stock and I'm only at 130 PSI compression (my head is cut for low comp at the moment in an attempt to do away with the ping... this was before I actually tested the compression). I have the proper base gasket spacer installed and the necessary material taken off the top of the cylinder to get port timing correct and all.
So the question is, is this just how these kits sound? I may try some fin dampers to see if that helps, but when riding I've tried jamming my sneakers on the fins and it seems to make no difference.