it's a pita,i had to do it last year,but it can be done. move coolant bottle,find a smann piece of fuel,airvent tube, place it over the nipple,pull brake lever in,watch for crappy,burnt fluid to come out. this is much easier with 2 people.keep adding fresh fluid till it looks clean soming out of the hose. tighten nipple nut and replace resivor cap you're good to go.