Cam shaft is in the middle of the engine so valve lifters are required.
Not so "up to date" when you see all other engines with over head cams.
Sheesh!
It is an older engine technology, but it can be applied efficiently. Just look at the racing success of the Corvette C5- and C6-Rs.
KB02, you do realize it was ridiculous that they even let those bikes into that class right? They had better have won. You think they would've let Hyosung enter a liter-size+ twin into the field? Exactly.
It was too little too late however.