Front Brakes Dragging

[Corium]

Need help please!

I have a 94 R1100GS - 58k miles so getting on a bit.

The old dear has been sat in the Garage most of the winter & seemed OK when taken out every now and then.

However just noticed that the brakes (front) were sticking on a little. This is noticable by slightly faster deceleration when closing the throtle, but mainly when pushing the bike in the garage - very diff to move about.

What i have done so far.

Taken calipers off & changed the pads - this was hamperd by not being able to get all four pistons to retract at the same time. Push 2 in & the other 2 come out. This happend on both calipers so leads me to think that this is not a caliper problem, but a circuit problem - fluid not getting back to the res (this was not too full), or is it. Had to use zip ties to make this happen.
While changing the pads gave the calipers a dam good clean, tooth brush and cleaner fluid.

Breaking is now very good but the drag is still there, and the disks get hot obviously.

Is this a master cyclinder problem?

Thanks, Graham

 

[newman7096]

You will ruin your discs and glaze your pads if you continue to ride like this!

Sounds like you need a total brake system overall!

Calipers clean and grease with non melt super caliper grease, copper grease rear of pads, use emory paper on the pin so the pads move freely and perhaps its time to change the brake fluid and check the master cylinder!

I used to suffer with brake seizure every winter but since using the caliper grease its stopped!

I just make sure that I grease the caliper just before winter and then in the spring.

Good luck!

 

[leigh]

piston in master cylinder is sticking and quite possibly the brake lever pivot is corroded too. you will need to remove the piston and clean up the bore using a scotchbrite pad to remove the corrosion followed by a soft cloth and some solvol autosol to polish the bore.replace the piston with a overhaul kit and clean up the lever pivot pin, particularly behind the plastic bush.
if the fluid hasn't been changed for years you may have to replace the brake lines.
you may as well overhaul the calipers while you're at it.you will almost certainly have got corrosion built up behind the dust seals as well as the main seal.you can get a caliper overhaul kit for about 20quid and that includes new pistons

 

[Corium]

Thanks for the replies

Have taken the hint & getting brake ovehaul done & braded hoses fitted at the same time - hope this fixes it.

Cheers.