Tight rear wheel

[DavidZ1R]

Any advice, the rear wheel when the axle night is tight binds on the rear disc/brake pad, the pad on the outside, if I slacken the axle bolt all is ok, put the brake on it grips, let go and it lets go, all the spacers are on, the axle bolt is on the caliper side, Any help to resolve it, oh z1000a1. thanks

[kev edwards]

You either have the wrong spacers, or a sticking caliper.

[z1bman]

have you got the correct spacer under the caliper? is the caliper sitting square to the brake disc

[DavidZ1R]

I think I have the right spacers, but I will have to remove them to check, do you know the correct spacer width? the wheel is square on as per the adjusters. I take it that the spacer between the hub bearing and the inside of the caliper is the one to check?

[kev edwards]

That would be the one, i don't have a measurement, sure someone will come along at some time though.

[Kev1R]

I know it sounds obvious but I would double check the allignment at each side.
Interesting how it only happens when the nut is tightened
Could be a warped disc but this would be rare.

I am not sure if the side the nut is on has any material effect.
I would be tempted to take the caliper apart - have a new o ring on stand by!

you sound not sure about spacers - is the bike new to you?

[z1bman]

the caliper spacer is quite distinctive this is what you should have


http://www.ebay.co.uk/itm/Kawasaki-NOS- ... 1388934205

spacer that fits into the sprocket seal
http://www.ebay.co.uk/itm/Kawasaki-NOS- ... 1297296347

spacer that fits inside the sprocket hub
http://www.ebay.co.uk/itm/Kawasaki-NOS- ... 1323917891

[DavidZ1R]

Yes that's the spacer I have, I also stripped down the caliper and rebuilt it, will double check the alignment of the wheel and check the caliper piston is moving freely

[z1bman]

alignment of the wheel wont be the problem . its either the spacer or possibly the piston sticking or bent caliper or incorrect brake disc

[Fred the Zed]

I had the same on the Shed... its was a seized piston on the rear caliper.

Fred

[DavidZ1R]

Well had the caliper off the spindle, pistons going in out okay, measured the spacer between the caliper and hub, measures at 31.5 mm, did notice a small round bump on the pad which is showing wear, swapped the pads, also noticed the caliper stay does seem to want to pull the caliper to the hub, anyway put all back together, still rubbing but not tight as before, so will keep an eye on it.

[z1bman]

bend the torque arm so its not putting any side load on the caliper

[DavidZ1R]

Looked at the thinness of the caliper stay, decided not to try to bend it. Does anyone with an a1 have the sprocket caliper spacer to confirm the width, mine measures 31.5mm, judging by every other thing on this bike I do not know for sure if it's correct, when I got the project it had the wrong discs on and no brake pads in the caliper, so someone had fettled with it. Anyone please.

[z1bman]

31.5 mm is the correct spacer for the a1

[DavidZ1R]

Sorted the problem out, thanks to z1bman for his help, it appeared that the space size I was given for the sprocket spacer was wrong, being 5mm to big, which pushed the wheel to far, making the caliper stay out of line, putting side pressure on the caliper, correct spacer fitted, and an additional 1mm shim behind the caliper spacer, and result, spins like a dream.