Can anyone on the forum tell me the inlet valve guide angle off the machined head surface please ? An inner valve spring broke on my 850 & it appears to have "hammered" the guide opening to a different angle. What we thought would be a simple remove & refit, isn't. The plan is to make a new blank guide & drill it out for the valve at the correct angle. So, I am guessing someone knows the angle it should be. Thanks in anticipation.