I took the advice of a previous TT discussion and purchased a Mity Vac II to bleed my wr 400 brakes. It was a hard part to find in Canada at a wopping $90 Cdn compared to $26 US. After replacing my orignal pads with aftermarket EBS's, I found the brakes soft and in need of a good bleeding. The old fashioned way was not giving me the feel I desired until I used the Mity Vac II. The Front brake works like a charm but the rear is still soft. The instruction that come with the pump are not clear on the PSI to use and if you should close the valve after so many seconds of vacume assist bleeding. Am I supposted to leave the Valve open and continue bleeding or am I supposted to close the valve and bleed like normal? The book is not very detailed. Can anyone tell me there hints and tricks with the Mity Vac II? Or am I stuck with spongy rear brakes?