[Wild Cobra]

You guys are correct on the fact that their is a problem with the VALVE float, but yet the 327 Chevy motor (OH OH how terrible of me oh well) that block can easily see the upper of the 8000 RPM range and seen even go further then that. Is it the valve train that allows it or is it the short stoke short bore?

Now lets bring another one a Mazda rotary engine no valve train at all and barely can see the 8500 mark so what gives?

Yes the Kawasaki is well balanced, so is the 302 ford.
That block dates to the middle of the sixties, and yet still having a hard time to go past the 7000 mark.

The titanium valves are great reduce weight and all but like you guys mention at such a high rpm it will tear it self to pieces.