Hope Tech Trial Bite Point Moving

[Max F]

The bite point of my hope tech trial brake started moving recently.
It most often happens when I'm turning into a g-turn. I then just pull the lever all the way till it hits my middle finger and the bite point is somewhere there and not far away from my finger as usual.
Pulling the lever a few times then moves the bite point back to where it was before.

Do I need to bleed the brake?
The bite point itself is still nice and hard.

Thanks for every help!

Edited April 1, 2014 by Max F

[AdamR28]

You either have a bent rotor or air in the brake.

[Muel]

Or a sticky piston in the caliper? All of my mono trials did this before I polished the pistons up. (5 brakes in total).

[Max F]

I will clean up the pistons and give it a bleed soon, to see if it helps.

How could a bent rotor cause that problem?

Edited April 1, 2014 by Max F

[Joe Papasnap Maher]

Because..where its usually biting..if the disc is bent at a certain point the pads then move a different distance to normal, therefore the lever feel is different.

I've had this problem before, and it was indeed a bent disc.

[wilf]

Yeah bent disc I'd say, it effectively resets the pistons back in the caliper so they have further to travel when you next pull it in.

[dezmtber]

Top up the resevoir and check the clearance between the pads and rotor (check it doesn't rub, or bent rotor)

then either straighten the rotor or adjust the caliper.

if that fails then try a full bleed and clean up the pistons and a good bit of silicon lube on the seals.