http://www.2fiddy.com is a dedicated site, started by an owner in the US, it has links to the latest bling, performance and comfort mods available for the ninja 250...
other discussions take place on the website, and manufacturers are even chipping in with free give aways to people who post on the site, unfortunately this is only for US residents....
some of the stuff on the site is useful some of it isnt, the first appearance of race glass and then the appearance of OEM replacement road glass was interesting....