XJ1100 Master Cylinder question

I am cleaning / rebuilding the front MC. Nice gunk, eh?

The previous owner cut the wires from the fluid level sensor very near the bottom of the MC.

How do I remove the sensor and not destroy the sensor? I would like to try to test and repair the sensor wire leads if possible.

 

Remove the screw in the upper right of that pic. Sensor pushes up from outside bottom. Its a real PIA to not break it, I have a turbo MC that I'm using on my 650 that had the sensor.

 

Did you do anything to bypass the electrical readout of the missing sensor?

 

The 650 doesn't have one so I didn't need to, I just needed a master that fit flatter bars. Since its just a switch, you should be able to isolate the wires or connect them together to disable the warning light. I don't recall if the light lights when the switch is open or closed.

 

Hope you are replacing the brake lines at the same time.

That brown goo is bad stuff in a brake system.

 

Yes, along with the rebuild parts I will be buying a stainless steel line from Chacal. I am just doing the right front since it seized and I want to be able to stop the bike when I pull it out of the garage. When I do the other two calipers I will also replace the lines. I have another MC question I will post soon.

 

I just checked on the lines prices from XJ4Ever
looks like the full meal deal is $301.65 for all the lines on that bike including the hard lines.
I need to do the same when I get mine out again.
But I'm going to have to replace all the rubber goods as well which Im sure will be at least
another $200.00
Its one thing to go fast but another to be able to stop. These 30 year old parts are toast
anyway with that crappy old brake fluid.

Cheers

 

Here is the other question. After initial cleaning, I inspected and noticed that the cleaning tube goes into a hole right next to the tiny relief passage. This huge hole is not supposed to be there, yes?

 

MN-Maxims, yeah, the cost of full brake job is steep. My 1100 cost me $1200. All of the other rebuild parts along with brake system will be more than I paid for the bike. Probably new rubber next year as well.

 

The large hole with the red tube sticking thru it is the fluid transfer hole....that is how fluid gets from the reservoir to the piston bore. The tiny pressure relief hole is just that, is allows the small amount of fluid that is captured in the piston bore to be relieved (back into the reservoir) when the brake handle is released, thus allowing the caliper pistons to pull back into their bores fully.

http://www.xjbikes.com/forums/threads/tech-topic-the-real-costs-of-maintenance.14581/

 

I am going to do the full deal on my 1100 as soon as I get a few bikes sold. Personally I am a safety freak anyway so the price of good brakes is cheaper than a hospital bed & A body cast

 

Thanks Len. I look forward to rebuilding it.