My gsxr is notorious for overheating. Its a 600 and after about 45 minutes of stop and go driving it will start getting up into the 235 range. Once it starts getting air to it the bikes fine. The radiator fan doesn't kick on though and as far as I know it should around 225 F. My only guess is that the water pump may be going bad. If you guys could give me some imput that would be awesome.