[lethalsquirter]

Hi all,

Was hoping someone has also been the same moron like I have been or at least may have an idea what I may have done to it.

Started driving away with my disk lock (Kryptonite Evolution Series 4 Disc Lock) on the left disk, as you can imagine I admittedly did slam it pretty hard moving forward, into the bottom of the caliper. Without tearing into anything yet, I do not see really any physical damage upon inspection, nor any leaks; however, there is no pressure at all without pumping, which immediately subsides when I am not holding the lever down after pumping.

It was in fact a newer MT09 that I jacked up, but any advise would be appreciated

 

[lethalsquirter]

Found it. 🤬 Thanks all. Expensive lesson not to forget your disk locks

 

[MTsRUs]

Found what?

 

[lethalsquirter]

Found what?

The break in the brake rotor that I am pretty sure is the culprit. You can see it on the right branch on the picture, compared to the left

 

[shamrock]

The rotor has nothing to do with the hydraulics so you need to dig a bit deeper.
Welcome to the forum.

 

[abe57]

If in fact you warped or bent the rotor every rotation will push the caliper piston in hence you have to pump the brake to push the piston back out . This would happen with every full rotation of the rotor. My bet is the rotor is warped or bent out of shape ! And by looking at the pic you need a new one anyway .

 

[wheelz96]

Sounds like you bent your rotor which is pushing your pucks open causing you to pump your brakes. Replace rotor and problem should be gone. Looks like a pc of rotor broke off where rivet is.

You should be able to see a bend. Put bike on front stand and spin wheel watching rotor and pads. Or, you can pull in brake lever (lightly) and push bike around and see if you can feel the lever move every time you hit bent section of rotor.

If rotor is in fact bent, replace immediately and don't ride around like that!

 

[shamrock]

I was thinking that he was losing pressure at a standstill without rotation. My bad!
He's still welcome to the forum though.

 

[lethalsquirter]

I was thinking that he was losing pressure at a standstill without rotation. My bad!
He's still welcome to the forum though.

Yeah I figured out it was the bend in the rotor pushing the piston out with every rotation. Expensive lesson to learn. Thanks for the welcome at least!

 

[LouG]

Have you got a "tell tale" cord for the disc lock? Something brightly coloured that you wrap around the throttle or brake lever. My Oxford lock came with one.

 

[lethalsquirter]

Have you got a "tell tale" cord for the disc lock? Something brightly coloured that you wrap around the throttle or brake lever. My Oxford lock came with one.

Didnt, got this lock with the chain and it didnt come with it. That is for sure being included in my orders of the replacement parts though...

 

[LouG]

A brightly coloured curly cord will work well.

 

[ilanr1]

For me only disk lock + alarm like ABUS 8077.
The alarm saved me a couple of times...

 

[dcpppf]

Thanks for sharing! Coworker got his tuono stolen from the work parking lot a few weeks back (i was parked right next to him about 30 min prior to the arrival of the thieves). So I have a disc lock/alarm and an underseat alarm i've been using now... I am quite paranoid i'll forget the disc lock since it is so new to me lol. I'm just glad to hear if I do screw it up that the rotor may be the only thing damaged.