Topic: Front brake movement question

[JDrider]

1975 cb550k1
Is the brake pad supposed to come towards the disc when squeezed and then move back away?
Correct?
Mine seem to move towards when squeezed and it’s hard to tell if it moves back away from the disc that much?
I think I already know the answer.
Is it supposed to be noticeable that the brake pad is coming away from disc brake when released?
What is my issue if it is supposed to move more?
Thanks

[MauiK3]

It moves a tiny bit and retracts. When relaxed, you can wiggle the caliper and feel just a little bit of side to side movement. If you lift the front tire on the center stand you should be able to rotate the wheel with only a small amount of resistance or noticeable dragging. If it's tight, you have a problem. Common problems are stuck piston due to crud, stiff pivot pin due to crud and corrosion, misalignment of caliper due to improper assembly. Sometimes the brake lines collapse and need to be replaced.

[JDrider]

Ok, thank you.
I’ll get the front tire up and check this.

[newday777]

It moves a tiny bit and retracts. When relaxed, you can wiggle the caliper and feel just a little bit of side to side movement. If you lift the front tire on the center stand you should be able to rotate the wheel with only a small amount of resistance or noticeable dragging. If it's tight, you have a problem. Common problems are stuck piston due to crud, stiff pivot pin due to crud and corrosion, misalignment of caliper due to improper assembly. Sometimes the brake lines collapse and need to be replaced.

Excellent explanation 👌

[robvangulik]

The most common cause for a stuck brake piston is crud in the groove  where the o-ring resides...

[JDrider]

After taking apart the the piston seemed to move correctly.
The brake pad just seems to stay mostly in place because it’s not attached to the piston.
So I’m guessing that happens?

[Doobie]

A common problem is the one of the two holes in the bottom of the cup is blocked. Run a fine wire through the smaller of the two holes (the other usually isn't blocked). With the cap off, when you squeeze the lever, you should see a squirt of oil pop out of the hole.