Don’t get too excited about the Aprilia RSV4 X. You can’t have one. Only 10 people can, one of them being Max “Curse you Valentino, I’ll beat you if it’s the last thing I doooo” Biaggi, and another being Andrea “turning Aprilia into a competitive MotoGP team is the biggest challenge of my life” Iannone. That would leave eight for us lesser mortals to fight over, but those were sold within a few hours, even at the RSV4 X’s €40,000 (US$44,000) price tag. So you can’t have one, even if you might want one. And you might indeed want one. The RSV4 platform may be getting a little long in the tooth now, having made its debut way back in 2008, but it was the raciest road bike we’d ever seen at the time, and there’s still nothing else out there that matches its obsessive degree of chassis tuneability. Indeed, with a few engine updates and suspension evolutions it remains an utter weapon on the road and track alike. And the RSV4 X takes things to a whole new level. For starters, thanks to carbon fairings, a lightweight tank and plenty of bits of billet aluminum, it now has an astonishing dry weight of 165 kg (364 lb)....