Thanks Red. I did question in my own mind the introduction of air. But I will give it a shot.
Yeah, don't ask me where the air comes from, even though I do have some theories.
The real hazard with old hydraulic fluid is moisture. If the water trapped in a caliper gets too hot, you may be faced with a caliper that is trying to lock up by steam pressure, which only gets worse until you stop. You can also lose all braking from that part of the brake system, leaving you with only half the brakes that you should have. The cure
is a regular schedule of bleeding, of course. The manual gives you the maximum intervals, sure, but feel free to do the bleeding at somewhat more frequent intervals, as you wish.
SpeedBleeders will make the entire bleeding process into an easy, one-person process. SpeedBleeders.com will know the sizes needed for the FJR. You can use SpeedBleeders on all of the brakes, and also for the clutch slave cylinder. They have a nifty bleed tube and fluid catch bag kit, to keep things neat, which I recommend highly. It is not hard to replace your hydraulic fluids entirely, using SpeedBleeders. It is the safety move, for you.