Update, Part 2. As brought up previously:
Quote:
Originally Posted by mtiberio
On my race Guzzi I had to tighten up valve clearances when I went to CrMo pushrods. They expand Less than Aluminum .
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In anticipation of this I decided to start by setting my valve lash at the minimum spec for both valves, .05mm. On the factory pushrods the motor is usually fairly quiet, with just a faint tippety tap in the background but otherwise not very audible.
As many can attest, when you set the valves to .08-.10mm, the valve noise is more pronounced, but otherwise not bad.
This is how my motor sounds with the valve lash set at .05mm. I could try to tighten it up a little more and set them to .04mm, but I think I will leave well enough alone for now until the new pushrods get worn in a little. I personally don't mind a bit of engine clatter.
Just be prepared for this if you decide to go with chromoly pushrods.