Sunday, July 14, 2013

ZX-9R Brakes and Oil

We are soon going on a short trip to Fort William for my delayed 40th birthday trip. I have chosen to use the ZX-9R due to it having not done many miles recently. I noticed that the inside brake pads on both sides of the front wheel had worn more than the outsides. I presume this is because the fluid goes into this side of the caliper first. Due to the pads being quite worn on the insides I decided that they would need  replaced before the trip. I also decided wDirty Caliperhile I was changing the pads to overhaul the brake calipers as well. I doubt they have ever been done before and I have previously noticed that some of the dust seal were trying to escape. So I order a new full set of seals for the brake calipers. Due to them being 6 pot calipers that is a lot of seals, 24 pistons seals and 4 caliper joining seals. I got all the seals from Wemoto as I have used them before when I did the VFR’s seals. and had no issues with them.

I loosened all the bolts on the calipers and ejected the pistons out a bit before I drained out all the brake fluid and removed the calipers. Once removed I separated the calipers and then fully ejected the pistons with the aid of a compressor. I also mark the individual pistons and only do one caliper half at a time to avoid putting the wrong piston back into a caliper bore. Once stripped down I cleaned up the calipers and removed the old seals. Due to their age the calipers were in very good condition and showed no signs of corrosion. The only issue was Cleaner Caliper with New Seals crud that had collected under the dust seals which had caused some of them to be slightly ejected out by the pistons. They were easy to clean out with brake cleaner and a small right angled pick. Once they were clean I blew them dry with compressed air and then put in the new seals. I refitted the calipers with a new set of EBC pads and then put in new brake fluid. I dragged the fluid through with a brake fluid hand pump and then bleed the air out with a one way valve attached at the bleed nipples. Everything seems fine and no leaks were detect from the caliper, but I will need to take the bike on a short run before we go up to Fort William. While I was ordering the brake parts I also ordered some oil and an oil filter. So I replaced the oil and fitted the new filter while I had the bike up on the stands.