Front Master Cylinder Components

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Matt21385
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Front Master Cylinder Components

Post by Matt21385 » Wed Jan 12, 2022 6:30 pm


When working on the bike tody, it has taken a hit to the handle bar on the right. The bar end has been damaged and now rotates. When rotating it makes a clicking sound. I know it hard to tell without seeing but could the inner part be damaged?

Also the 'L' shaped plastic pipe that sits to the right of the master cylinder had a very small amount of brake fluid. Where the 'L' shaped pipe connects at the bottom to flexible rubber. Should these two parts be sealed together or do they seal with compression? I have included a pic pointing to the connection I'm talking about.
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Champ87
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Re: Front Master Cylinder Components

Post by Champ87 » Wed Jan 12, 2022 8:09 pm


Matt21385 wrote:
Wed Jan 12, 2022 6:30 pm
The bar end has been damaged and now rotates. When rotating it makes a clicking sound. I know it hard to tell without seeing but could the inner part be damaged?
Unlikely. The bar-end weight is attached to a damping weight inside the bar. The whole assembly is held in place with a metal clip. When you rotate the bar end, the clicking sound is the tangs of the clip clicking into the retaining holes.

2021_04_14_6381.jpg
Matt21385 wrote:
Wed Jan 12, 2022 6:30 pm
Also the 'L' shaped plastic pipe that sits to the right of the master cylinder had a very small amount of brake fluid. Where the 'L' shaped pipe connects at the bottom to flexible rubber. Should these two parts be sealed together or do they seal with compression? I have included a pic pointing to the connection I'm talking about.
Obviously, there shouldn't be fluid coming out of there, but if that L-shaped connector pipe took a hit then it could just be a little bit of seepage. It's also possible that connector is cracked. Best thing to do is clean it up and do frequent checks to see if any more fluid comes out. That pipe is not under high pressure so it shouldn't affect braking (unless all the fluid drains out :eek:). It's a $10 part so, if in doubt, replace.
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Re: Front Master Cylinder Components

Post by Matt21385 » Wed Jan 12, 2022 8:30 pm


Champ87 wrote:
Wed Jan 12, 2022 8:09 pm
Matt21385 wrote:
Wed Jan 12, 2022 6:30 pm
The bar end has been damaged and now rotates. When rotating it makes a clicking sound. I know it hard to tell without seeing but could the inner part be damaged?
Unlikely. The bar-end weight is attached to a damping weight inside the bar. The whole assembly is held in place with a metal clip. When you rotate the bar end, the clicking sound is the tangs of the clip clicking into the retaining holes.


2021_04_14_6381.jpg
Matt21385 wrote:
Wed Jan 12, 2022 6:30 pm
Also the 'L' shaped plastic pipe that sits to the right of the master cylinder had a very small amount of brake fluid. Where the 'L' shaped pipe connects at the bottom to flexible rubber. Should these two parts be sealed together or do they seal with compression? I have included a pic pointing to the connection I'm talking about.
Obviously, there shouldn't be fluid coming out of there, but if that L-shaped connector pipe took a hit then it could just be a little bit of seepage. It's also possible that connector is cracked. Best thing to do is clean it up and do frequent checks to see if any more fluid comes out. That pipe is not under high pressure so it shouldn't affect braking (unless all the fluid drains out :eek:). It's a $10 part so, if in doubt, replace.
Thanks for the response. Is it worth looking at aftermarket bar-ends or would I be best just to stick with the original?

I'll keep an eye on the 'L' shaped pipe for any more seepage and if I get any more I'll replace it.

Appreciate all your help
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Champ87
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Re: Front Master Cylinder Components

Post by Champ87 » Wed Jan 12, 2022 9:38 pm


Matt21385 wrote:
Wed Jan 12, 2022 8:30 pm
Is it worth looking at aftermarket bar-ends or would I be best just to stick with the original?
The way the bar end weights attach is a bit unusual. I'd be inclined to stick with the original to avoid fitment issues. If you want to change bar end weights for something with a different look then it shouldn't be a big deal but it will be a try-it-and-see situation.
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Re: Front Master Cylinder Components

Post by Vex » Thu Jan 13, 2022 12:42 am


Yea...it sucks. I have woodcraft bar ends with a gap to mount things like mirrors. Even the thicker ones built for the Z125 didn't fit.

Essentially, I had to wrap the inner peg with the wonder tool, duct tape, then it tightened somewhat alright. They don't move around etc.

I also used a different bolt than the woodcraft one so I could reattach the weights inside.
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Re: Front Master Cylinder Components

Post by prettybirdSE » Thu Jan 13, 2022 7:18 am


'I know it hard to tell without seeing but could the inner part be damaged?'
Yes.That clip in there can easily get bent out of shape.Sounds like that's what happened.Clicking but not locking.I went through this.
I ended up getting some new CRG aftermarket bar ends and had a shop mill em(a little) so I could get the bar end mirror clamps on there(the CRG ones were a shade too small in diameter).Also had to wrap the inner shank with some duct tape to tighten em up where they'd fully tighten and firmly squeeze(into the bar end Fitment in the ID).I think I also bought a couple of longer bolts for em.
That factory clip deal is kind of a pain if the clip gets deformed.Mine never did seem to go back like stock after I removed em.Tried several times to make sure the clip was 'like new'.They never did fit the same.They'd click,but they weren't tight in there.
Last edited by prettybirdSE on Thu Jan 13, 2022 4:17 pm, edited 1 time in total.
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Re: Front Master Cylinder Components

Post by Matt21385 » Thu Jan 13, 2022 8:51 am


I'll remove it today and have a look. Think I'll just stick with the genuine ones as at least I know they fit properly
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