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Should this hole be in my brake MC seal?
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100% Kawasaki Biased
 
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Should this hole be in my brake MC seal? - June 11, 2012, 09:34 AM

I recently lost lever pressure on my front brake after dropping the bike at Tasker's on the brake lever side. I bled the system to make sure there was not air in the lines and that does not appear to be the issue. No leaking of fluids externally, just no more front brake pressure when I squeeze the lever. I can't tell if this seal is supposed to have a hole for pressure relief (it looks to be a nearly perfect circle) or if my seal was cut somehow and that is why I am not getting any front brake. This is the seal on the “to the brake line” side of the MC.

Any other ideas on why I would have no brake pressure would be appreciated.



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June 11, 2012, 10:02 AM

Just ordered a new piston and seals to be safe.


You can live in your car, but you can't race your house.

'07 ZX-10R - 156 RWHP/182 MPH
'09 KX450F - VCHSS 29F
'85 ZL-900 Eliminator
'01 Ninja 250 (Sold)
'06 636 (Sold)
'99 ZX-6R (Sold)
'94 Ninja 250 (Sold)
'99 YZ-250 (Sold)
'73 CL 450 (Sold)
http://www.youtube.com/watch?v=a6Jpc...eature=related
http://videos.streetfire.net/video/H...bud_408656.htmfeature=related

The difference between men and boys is that boys make excuses and men make changes.
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June 11, 2012, 10:08 AM

Yeah, that's not supposed to be there. You blew it up when you dropped the bike on the rocks. The seal on the left does most of the work, and the seal on the right helps keep fluid from leaking out of the back end of the MC chamber.


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June 11, 2012, 10:15 AM

I was 99% sure that was the issue when I saw a chunk of rubber floating in the fluid, but I wanted to make sure, thanks.


You can live in your car, but you can't race your house.

'07 ZX-10R - 156 RWHP/182 MPH
'09 KX450F - VCHSS 29F
'85 ZL-900 Eliminator
'01 Ninja 250 (Sold)
'06 636 (Sold)
'99 ZX-6R (Sold)
'94 Ninja 250 (Sold)
'99 YZ-250 (Sold)
'73 CL 450 (Sold)
http://www.youtube.com/watch?v=a6Jpc...eature=related
http://videos.streetfire.net/video/H...bud_408656.htmfeature=related

The difference between men and boys is that boys make excuses and men make changes.
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June 11, 2012, 10:37 AM

Like I mentioned on FB, this is a fairly easy fix. Only tricky part is getting the snap ring back in place. You can install and use the lever itself to hold the piston down far enough in to work the snap ring into its seat.


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June 11, 2012, 10:52 AM

Sorry Thomas. Booby trapping someone's bike was the only way RileysDad, CamDLux, and I could think of to make sure that you guys wouldn't try taking us through any more "beginner" trails.
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June 11, 2012, 11:15 AM



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100% Kawasaki Biased
 
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June 11, 2012, 12:12 PM

Thanks John, yeah, I had to take it apart to get the pic. They are relatively simple though and I will probably buy/borrow some snap ring pliers since I already put it back together.

@ nootherids - lol, I knew it! Funny because I am not even one of the fast guys in the dirt but I learn quick. Looking forward to riding with you guys again soon.


You can live in your car, but you can't race your house.

'07 ZX-10R - 156 RWHP/182 MPH
'09 KX450F - VCHSS 29F
'85 ZL-900 Eliminator
'01 Ninja 250 (Sold)
'06 636 (Sold)
'99 ZX-6R (Sold)
'94 Ninja 250 (Sold)
'99 YZ-250 (Sold)
'73 CL 450 (Sold)
http://www.youtube.com/watch?v=a6Jpc...eature=related
http://videos.streetfire.net/video/H...bud_408656.htmfeature=related

The difference between men and boys is that boys make excuses and men make changes.
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June 11, 2012, 02:37 PM

You should be able to just replace the cup seal.


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June 11, 2012, 03:07 PM

The piston and seals come as one piece from Kawasaki/Nissin so I just ordered that rather than getting a rebuild kit for the same price. I also found some radiator grills for a good price so I picked those up too.


You can live in your car, but you can't race your house.

'07 ZX-10R - 156 RWHP/182 MPH
'09 KX450F - VCHSS 29F
'85 ZL-900 Eliminator
'01 Ninja 250 (Sold)
'06 636 (Sold)
'99 ZX-6R (Sold)
'94 Ninja 250 (Sold)
'99 YZ-250 (Sold)
'73 CL 450 (Sold)
http://www.youtube.com/watch?v=a6Jpc...eature=related
http://videos.streetfire.net/video/H...bud_408656.htmfeature=related

The difference between men and boys is that boys make excuses and men make changes.
  Send a message via AIM to  
Reply With Quote
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