Upon opening the engine I saw this. A strange valve setup so I stared at it a bit confused as I can't recall ever seeing this before and was also questioning my memory.
Well, as it turns out it's one of those rare and coveted Octura made valves.
Strange that it would be on a TT 400 but maybe they ordered them for manufacturing these???? Maybe David @factory might have some insight on this. Unfortunately there's no model number stamped into it and the air baffle is a clean one so obviously changed.