Try our new info resource - "Aladdin's Cave" (Main menu)Just added a separate link to Ash's Dropbox thread (shortcut)
Hi Ash,As I said in an earlier post, the 400 head I took the two valves from to measure for Roy had no seal on the exhaust guide, or provision for it (tapered a bit like the nose in the chamber) The two 400’s and the 350 I have all have seals on both inlet and exhaust. Perhaps this spare head I have with no exhaust seals is very early?Ian
My 1977 Honda parts list shows this: (Attachment Link) Only 4 seals listed and only shown on inlet in illustrationIan