Quote:
Originally Posted by volvulus
Thank you, I will contact Luke.
I'm confused as to how or why the new valves would be shimmed but, when I've dismantled the head I expect it will become clear.
Regards ken
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The valves are shimmed to set the clearance correctly. Different shim thicknesses are available to achieve this. Make sure when you dismantle the head you keep the shims numbered with their associated valves so they go back in the right places. Also if you're going to lap the rest of the valves in (would be a wise choice), check the clearances after doing that rather than before.