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Dare I say over-engineering?A V2 two stroke with fuel injection will be lighter ,smaller, cheaper etc. and who cares for pollution from motorbikes ?
The desmo valve gear was designed to overcome valve spring bounce at very high rev. However, today, are are alternative methods available such as pneumatic springs etc.
I just saw this Picture of a Ducati V4 1000 MotoGP engine without it's side cover :This is a very beautiful gear driven cam system - hope you all enjoy it
Guess the engine;