Perhaps the hardest thing for any motorcycle reviewer is to get rid of preconceptions when forming and imparting opinions , but , of course , it ’ s valueless without experience . So , balance and a certain restraint is called for . I ’ ll do my best . Aprilia has been delivering large capacity superbikes since the late nineties and have had success and mixed results from time to time , especially when competing against teams with larger budgets . However , the RSV4s of the last few years have held their heads high , and continue to do so . The recent introduction of the RS660 into the superbike family followed a trend that many manufacturers have been following – feeding into and picking up on the huge desire for fast , lighter bikes , headlined by Moto2 . Triumph led the way , largely , with their 765 offering , powering that racing sector , and there is real appeal in lighter versions of superbikes that can deliver ‘ near as dammit ’ speeds and behaviours on the track . Overall , the market has continued this trend to lighter road-ready , racing-cued sport bikes that deliver well in the 450cc region . Bikes like the CFMoto 450SR , the KTM RC390 , Yamaha MT03 , Kawasaki Ninja 400 , and Honda ’ s CB500R to name a few .