Whats wrong with the L? The R is a straight up race bike. The entire thing is made out of Aluminum. Every single bolt on the bike will need to be helicoiled at some point. Yes it's fast and hugely because of the power to weight ratio but I wouldn't want an Adv bike to be nearly all aluminum. Yes the L is heavier and slower but the engine has one moving part and the bike is essentially indestructible. THAT's an Adv bike.