I have a question about the VFR's horribly complex brake system; I'm having a hard time understanding Honda's manual, and I haven't found anything online describing my symptoms. About a month ago, I changed my fork seals, and while the forks were off I figured I'd fix a stuck caliper pin. Ended up rebuilding the front brakes and front brake/clutch master cylinders for good measure. I had to re-order a new secondary master cylinder piston kit because the existing one's rubber seal was torn. I THINK I reinserted the teal filter-thingy into the secondary master cylinder port in the correct orientation. I don't know what this thing does; it looks like a filter or valve of some sort. While I was repainting/rebuilding the forks, the bike sat in my garage for 3 weeks, with the front brake lines wrapped in cling wrap to prevent moisture intrusion. When I put everything back together, the front brakes were AWESOME, especially with the new pads I put in. The rear brake was spongy. I took the bike on the freeway to test it out (only 1 mile from my house) and almost as soon as I got on the freeway, I found that the brake seemed to stay engaged. When I slowed down, the bike would slow down FAST, and I had to ride in 2nd gear just to keep the bike moving at 50mph. Anyways I took the next exit after about 2 miles, to get the heck off the freeway. On the exit, the bike stopped even more dramatically when I let off the gas. Stop-and-go traffic was almost impossible. When I was riding along at 25 or so at 4000 rpm, if I pulled in the clutch, the engine would bounce to the rev limiter, it was working that hard. Got home after another 2 miles (why does the ride home on a bad bike always seem to take hours?) and my brake rotors were burning hot. I could barely push the bike; it felt like the brakes had locked completely. I would say it felt like the entire "secondary" rear brake system (two pots in front, one pot in back) was engaged, rather than the front brakes or the primary rear brakes (two pots in back as I understand it). Fast forward to this morning. I rebuilt the rear caliper (it already looked fine) and bled the rear brake system completely, which took hours, but finally got a nice short pull on the lever, no squishiness. Seemed great in the garage with no "locking" behavior. Took it on the exact same route. Same exact behavior, almost worse this time. I actually couldn't even push it into my garage; I had to use the engine just to move it forward. The rear brake was smoking. Secondary master cylinder? Rear master cylinder? Faulty proportional control valve? Delay valve? Which of the VFR's many brake subsystems could it be? I'm going to check the secondary master cylinder next, because the way it got worse and worse, I feel like the secondary master cylinder is sticking, then locking itself against the front brake, which causes more sticking, and so on... thing is, those are new parts in there, and I didn't see a pinhole relief valve in the cylinder, so I'm not sure how it can even become stuck, unless that teal thing is involved somehow... What a horrible, maddening design. (I know it functions great, but it's a PITA to work on!) I wouldn't actually mind spending the 10+ hours I've already spent if it was all documented properly, but nowhere do I see docs for what that teal button-thing, the delay valve, etc. actually do, so it's like shooting in the dark. Anyways, if anyone has heard of a similar issue, replies would be greatly appreciated.