a few answers....a bit of advice....some instructions:
answers: your fan is terminal. replace it immediately. and i would NOT do any more experimental heat-inducing practices to trouble-shoot your problem. simply put your fan is junk. these motors hate high temps. replace the fan and install right side air scoop system if not already done. 235 degrees celsius approximates to 455 degrees fahrenheit and that can be a death-sentence for these motors.
fans: available from internet sites such as ebay...american sportbike. brand is spal. you can also order your own and follow this link to perform the interchange. http://www.badweatherbikers.com/buel...tml?1435773333
how to replace/basic guidelines: disconnect negative battery cable...raise rear tire 6 inches or more off ground...remove rear wheel(some don't--i do to make job easier)...disconnect rear shock.....allow swingarm to drop to lowest position...remove fan screen hardware...rotate fan and wiggle and pull towards rear of bike and out it comes.....disconnect fan plug. install is reverse of removal of course. use patience and some sort of penetrating oil on all hardware prior to removing. use loctite on all fasteners during replacement. ALSO.....with fan removed carefully check the rear cylinder for any signs of oil leakage particularly in the head and rocker box area. if your old fan is moist with oil you have a leak. if you have a leak find out from where. repair the leak or the oil will ruin your new fan in a short period of time.