There has been some chatter on the web that Aprilia are working on a 4 stroke 250cc road bike, details are sketchy, there are no leaked pics etc. The general consensus is that a RS250 2 stroke is definitely out due to emissions issues, but the idea of an Aprilia 4 is pretty cool Here is the blurb I found on Visor down http://www.visordown.com/motorcycle-news-new-bikes/aprilia-to-join-the-250-battle/22447.html
Id bet it would be an impressive machine if it eventuates..... :Thumbs_up: Seems the "250" market is growing in choice with the learner requirements worldwide and the 3rd world/Asian small capacity/low cost requirement. And as u have mentioned elsewhere the new Moto3 category has changed things also.