1982 R65 has been in storage. Single disc in front w/Brembo caliper. Rode it a couple of times last year. Couple of times this year. That's about it. I know, don't yell.. I've neglected to replace the brake fluid in many years. When I brought it up out of the basement this year the level was fine but the lever was spongy. Got worse. Decided to flush with new fluid and bleed. Took off cap of reservoir, drained what was in, put in fresh, and started the bleed routine. Lever just got spongier. The harder I tried the less pressure I sensed and finally just offered no resistance whatsoever. I'm doing the bleed procedure correctly according to my experience in the past and a refresher look here.. http://www.bmwmotorcycletech.info/brakes.htm Question then. Shouldn't the lever actuated piston/plunger develop pressure regardless of what may be amiss downstream? There is no fluid leakage evident downstream whatsoever. The tiny feeder hole at the base of the reservoir is visually unclogged and I can see the piston moving back and forth beneath it. Is this evidently (certainly?) a completely blown seal on that plunger? Or could it be something else? Reason I ask is that the plunger only has about five years on it since new replacement and has only seen about 12,000 miles of use (mostly highway at that). I'm hesitant to inspect it since that commonly abrades the seal lip yanking it out of an old corroded barrel. I'd rather not replace it unnecessarily. Thanks for any advice.