[TR] Valve adjustments tractor engine

[Randall]

> The other way described in my maintenance book is to find 
> "the point of rock" for two valves same cylinder, and then 
> adjust them both.  
> 
> Why do I seem to remember that second one is wrong somehow.  

Just to second what Mark said; you turn the engine until both valves on one cylinder are partly open, and then set both valves for
the cylinder that is opposite in the firing order.

I use this method all the time (when I run the valves) as I find it much easier to remember, and to do; than counting out the "Rule
of 9" all the time.  As a bonus, it works for all Triumphs, whether 4, 6 or 8 cylinders.  There are a few engines in the world that
it doesn't apply to, but it covers most of them.  (Basically any even-fire 4-stroke with an even number of cylinders.)

Randall