[urq] Engine compatibility WK vs WX

[Robert Rossato]

> > I have another question. The valves on my WX head  were 
> adjusted 4 years ago,
> > when I had the head rebuilt. I didn't rode much,  so the 
> mileage should be
> > less than 15k miles. Is it normal that all the  base circle 
> of the lobes
> > don't touch the solid tappets (lifters) ? I can  insert 2 
> or 3 sheet of
> > papers between the lobe and the tappets. Shouldn't  they be 
> at least very
> > near (I can't find my feeler gauge.) when the engine  is cold ? 
> 
> You are "supposed" to adjust the valve lash with a hot engine, if you 
> can get it open that fast.  When cold, the clearances are larger, and 
> much more vaguely specified.
> 
> -- 
> Huw Powell

The clearances are actually smaller when the engine is cold.  And more
to the point, yes there should be a clearance between the base circle
and the tappets, regardless of cold or hot engine.