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No more valve/seat problems!!
Posted: Sat Sep 27, 2008 9:53 pm
by linearaudio
How about using one of these to do away with the valve recession & additive headache:
www.coatesengine.com 
Posted: Sat Sep 27, 2008 10:05 pm
by bmcecosse
Posted: Sun Sep 28, 2008 12:57 pm
by Gareth
Oh my word, I got confused after the third sentence...
Posted: Sun Sep 28, 2008 5:13 pm
by rayofleamington
Rotary valves aren't especially new. IIRC Ducati and other bike engines (especially race bikes) have been using them for a while as they allow more RPM.
Essentially it's no different to a conventional 4 stroke but the valve rotates instead of going up and down to close.