The cylinder head saga continues. Up in Wisbech Stu Rogers has shortened the new inlet valve guide and fitted both new 9mm internal diameter sintered bronze guides. He has also machined the new hairpin spring ends to give a little float to help prevent breakage. The head had tulip shaped valves in both inlet and exhaust with 9mm stem diameter. The exhaust should be a normal shape. A new pair of 100mm long valves with 36mm heads duly arrived from AKF in Germany and were forwarded to Stu. This made the phone ring. The new valve stems are 8mm. So now the quest is to see if they can be swapped for 9mm stem items. I have a sinking feeling the answer will be no. This is because the T model, Siegfried is an S, did have 9mm stems but only 34mm heads. We want to avoid having to replace the valve guides for 8mm even if I can find them.
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