4-valve DOHC engine aircooled

[Bugat5speed]

By some mails I found out that there seem to be some missunderstandings on the heads and the engine. The engine will be a complete new engine. It´s no type IV. We will have a crankshaft with 5 bearings and a very stabile crankcase. So high revvs will make no problem at all. The heads will not fit a type IV, as I didn´t want to follow the type IV-route. It´s my personal opinion, that the type IV-engines are already over their limits and do not stand what is promised. My experience is that they are not stabile enough from the crank´s side and by this can not stand the "tortures" for a longer period.