Last night I removed the valves, valve springs and retainers without too much trouble. It was a little bit fiddly however nothing that couldn�t be handled with a couple of small screwdrivers.
I firstly inspected the valves where is makes contact with the valve seat and no pitting or cracks were present. It was actually in relatively good condition.
The valve seats looked good as well. They were not loose or pitted in any way from what I could see.
Your explanation of how to remove the valves was spot on, so thanks for that.
To be comprehensive I again measured the tappet clearance before removing the spring noting how sensitive the position of the piston can be in relation to the tappet clearances. The clearance of the inlet valve was .10mm (.003inch�s) which is still below minimum specification (.005-.007). Remeasuring the exhaust valve did not change. It came in at .15mm (.0059 inch�s).
We spoke in a previous thread about the measurement of tappet clearances, that being positioning the piston a little past top dead centre on the compression stroke. Do you have any extra hints to make sure I have the positioning as close as possible?
Secondly I need to confirm whether or I should lap the valve before I grind the stems?
