That's where you need a small bike that can keep you engaged without going ballistic speeds. Why Riding A Slow Bike Fast Is So Much FunKawasakiA less powerful sports bike forces the rider to protect momentum. The Aprilia RS 457 Is More Fun Than Bikes With Twice The PowerThe Aprilia RS 457 captures that middle ground while looking nothing like a compromise. The standard RS 457 carries a starting MSRP of $6,849, giving it some serious value for money. A passenger seat and footpegs are standard, so the RS 457 hasn’t sacrificed everyday practicality simply to resemble a miniature MotoGP machine.