Sad to say I had a Yam 650 maxim and didnt change the brake fliud for years and years and the brakes worked just fine and the guy I sold it to didnt change it for years afte that .
Point is I also change mine on a schedual now but are we just a little bit paranoid as in I have had cars that were ten years and older and never had the brake fluid checked or changed unless a repair was needed ???
2012Yamaha Tenere 1200 for really wandering off the beaten path
2005 GL1800 Sold to another to enjoy
2006 ST1300 Gone but not forgotten
2009 ZX14 Also gone and will be replaced someday
some of the best of both worlds