So let me ask this. How would you expect a motor to run with exhaust valve clearences as large as 0.36mm with a max of 0.31mm specified and intake valve clearences as large as .43mm with a max of .25mm specified? Will the motor run decent? If i can get past the excessive valve train noise, can I ride it until the valve clearences tighten up without harming the motor in some way? Thanks guys

Most likely, the older shims were thinner to accommodate the wear on the old valves. The newer valves are not sitting down in the new valve seats quite as far as the worn valve seats and valves. Always set the clearance with the engine cold, and at the upper end of the adjustment spectrum. As the valves wear in, the clearance tightens. I hope this helps. Jim On 9 Jul 2006 22:53:10

I know valve lash must be checked/adjusted after top-end rebuilds. My question is: does anything about these valve lash numbers seem funny to you experienced rebuilders? (please see numbers below) Quick background: My first time doing a top-end rebuild on a 1998 zx7r motor with ~27k miles. The rebuild consisted of new ferrea valves with stock valve head thickness. I had an experienced acquiantance