Decided a while ago it was time to replace my brake fluid as it was a disgusting brown colour, and I suspect has never been changed. Recently I bought a vacuum pressure bleeder for the job, so I thought this would be a piece of cake....HA, YOU WISH!! about three hours later I finally got some feeling back into the front brakes, after reverting to the good old fashioned rubber tube with a split in it, and a jar of brake fluid (as actually recommended in Haynes). The vacuum pump seemed to pull the old fluid through fairly fast, but for bleeding the system, was a bloody nightmare, every time I felt like I was getting somewhere, the nozzle fell off the bleed nipple, or the fluid coming out was massively aerated. I suspect there is a TECHNIQUE to using this very clever piece of kit that was escaping me somewhere...hence my going back to tried and test old fashioned technology. you also seem to need three hands, is this really a two man job?
SOOOO, all I have achieved today is changing the fluid in the front brakes, but I did then go and give it a proper good test in a 100 mile trip around the Lincolnshire countryside, and OMG what a difference, I nearly went over the handlebars the first time I gave them some proper welly......the feel is better and the pressure needed to get the bike to rapidly slow from warp speed (or 70MPH as we shall call it for legal reasons!) seems to be much less than previously.
I have now decided to leave the rear system alone for now, mainly because it works ok, but also because the upper nipple on the rear caliper feels like it will shear off before it releases, is this common does anyone know? and if it should happen, is my caliper scrap?
ps, is there a good way of removing any spilled fluid off the bike. I tried to be very careful, but brake fluid just seems to get everywhere, on the caliper, on the discs, on the wheels, on the handlebar... how the hell do you stop it dripping on everything? and what can you use to neutralise its harmful effects? Obviously I have wiped off as much as I could see, but some of it will still be lurking in the nooks and crannys...does just washing with soap and water remove it?