Honda XL1000V Varadero - The bike that started our community! > Mechanical
Rear brake dragging
mr_diver:
This one has got me stumped.
I'm no mechanical numpty -- I do all my own maintenace and know which end of the spanner to hold.
The bike is a XL1000v9 37k miles.
Still on the original front pads, rear was changed @ 21k miles. I've gone through 2 sets of rear pads since then and will need another set quite soon.
The Rear caliper is holding (dragging) the disk, but when moving. I can get both the other two pistons worked directly from the rear mast cylinder and the middle piston worked from the rear m/c and from the secondary m/c.
I have stripped all calipers, replaced the seals, greased the sliders, reassembled, bled (I know the correct process and pressurised the secondary m/c and bled the rear middle nipple with someone's help) 3 times!!!
I've replaced the Secondary m/c internals and rod.
I have stripped and cleaned the whole system, including the PCV. Everything seems to be functioning as designed.
I've replaced the rear disk as the old one was showing some scoring, but not warped.
I've checked front wheel alignment.
Rear wheel is aligned correctly.
Wheel bearings have been replaced.
I have checked if the bike has any outstanding recalls and it`s all clear.
Front left caliper is not dragging.
Still the rear brake drags and the disk gets quite hot and so does the caliper.
It happens whether or not I use the rear brake lever (not a suprise with linked system)
I'm stumped with this and it's starting to get to me.
I can't risk riding the bike incase it gets worse away from home. If I can't get it fixed the bike has to go, then there is nothing out there I can replace it with other than another Varadero.
I've found other threads for the Varadero, VFR800, ST1300 and CBR1100xx that has the same brake system with similar issues, but I've tried all the offered solutions but no one ever closes the thread with a conclution or solution of any help - Cheers everyone!!! >:(
Hope someone can help.
the prodded dog:
Only two thoughts spring to mind and it is a long time since I had a Vara.
Is there enough clearance between the pad backing and the caliper body?
Is the front caliper sticking on its pivot so that it activates the rear brake all the time?
The Prodded Dog
mr_diver:
Thanks for the input, but both of those have been checked and ruled out.
I'm in the middle of another full strip down, seals and pistons check out fine, slider pins are clean, pivots free.
I'm waiting on new rubber slider bushes to arrive. I'm changing them as they are 10 years old and it rules them out rather than they look suspect and I've run out of rubber safe grease.
I've also been told to release the rear caliper mount bolt and see if the angle of the caliper changes- maybe naffed mount.
SB:
It would help if you could find a way of working out if its the middle piston or the two outer ones (or even all 3 ! ) that are dragging.
That would help to limit the number of components that could be causing the problem.
Problem is, other than putting a pressure gauge in the lines I cant think of any way of doing that !
mr_diver:
That's the problem.
I've run the bike on the centre stand in second gear at idle - holds around 20mph indicated and the disk doesn't even get warm.
Either it takes some heat from action at least once to start the issue or it, something to do with the secondary master cylinder, or the mount is bent and 20mph isn't enough speed.
Navigation
[0] Message Index
[#] Next page
Go to full version