I'm bleeding

[dpotter58]

The problem with that one is that the LG and the LH use different Master Cylinders. The LG does not have linked brakes, and has a smaller bore. No other model uses the same size rear MC as the LH.

The XJ does right? I haven't found a kit either. I did see one listed on ebay s NOS within the last couple months but was concerned with the age and rubber deterioration.

[jmnjrpa]

Mine should be in tomorrow. I'll let you know if it is right. I'll let them know if it's NOT!

[jmnjrpa]

Got burned

DA's at Bike Bandit sent wrong one and do not have the right one. Gotta think on it now!

[DGXSER]

You could look for an XJ rear MC like C-bug did. Or you could switch the systems out to typical XS system of rear only for rear MC and dual front.

[CatatonicBug]

The XJ does right? I haven't found a kit either. I did see one listed on ebay s NOS within the last couple months but was concerned with the age and rubber deterioration.

No. It doesn't. The XJ has a larger bore rear MC than the XS-LH. The XJ kits are avalable from Chacal on the xjbikes.com site.

[CatatonicBug]

DA's at Bike Bandit sent wrong one and do not have the right one. Gotta think on it now!

I had a feeling that would happen... Sorry to hear that. I was really hopeful that you had found a source for them. The XJ option works perfectly, and all you have to do is wrap the fluid level sensor wire around the MC to keep it out of the way. There is one on ebay right now fo $30. Item #230379634443.

As a side note, I just replaced the front left caliper on this project LH tonight (with one from an XJ). All the fluid had been drained from the lines forward of the rear MC, since I disassembled the system, trying to get the old caliper to work. I used this one-man bleeder that I borrowed from my neighbor (just to see if it would work) and I was AMAZED at how easy it was!!

I used the tubing addition to the reservoir pictured earlier in this thread, to add to the amount of fluid I could pump through at a time. It took me a total of about 15 minutes to bleed the entire system (I re-did the right front too, just for kicks). No need for the $30 mighty-vac. This thing is only $4 at Harbor Freight! I'll be going to get my own soon!

[Rasputin]

I have a brand new old stock kit (Genuine Yamaha # 4W1-W0042-00) sitting right in front of me. I plan on using it on my 81LH even though it is old stock. I figure it can not be worse than using one that has been in the bike for 30 yrs. It has been in its original box, in a sealed plastic bag for all these yrs too. The seals seem to be like new in their flexibility and looks. If anyone knows for sure that using them may not be a wise decision please let me know.

Now for the reason for the post. As I have a brand new kit here, all the dimensions for the rubber and metal parts are available. If anyone has access to a lathe or whatever machinery needed, the metal parts could be made. Now if anyone a lot smarter than myself knows how to find the cups by cross referencing them or find them by measurement, we would have nearly everything. The spring, circlip and horse shoe shaped washer would be easy to find if we could get the other parts. So, If that someone a whole lot smarter than myself wants to take on the searching etc I will supply the kit I have for use as a pattern so to speak. If we managed to pull something off, a supply would be in place for all the XS's that need this kit.

[draketrumpet]

No need for the $30 mighty-vac.

Ah, but there are so many other things you can do with a mity-vac. Like use it to activate the diaphragms on your petcocks after a rebuild to make sure you did it right before you put it back on the tank (I know, you have a special, but maybe one day you'll realize you can be standard too). Or, to suck all the fluid out of the MC when you realize you didn't clean it well enough. Or to do a bench bleed on your car...Lots of things.

That being said, don't get the one man thing from autozone...twice the price.

[jmnjrpa]

Bug,

Are you sure the XJ has a larger bore? They list it as 16mm. That works out to .629 while I have not yet checked the MNS has 11/16 on it. That would be .687? Gonna check in the morning. I would not prefer going smaller.

[Rasputin]

Different part number for the XJ's and the pic on Beneficials site is different than The kit I have which is the 4W1-W0042-00.


10M-W0042-00-00

Part Name Cylinder Kit, Master
Manufacturer Yamaha
Link to this pic
Suppliers of Yamaha
Fiche Name BRAKE PEDAL - REAR MASTER CYLINDER
No. on Fiche 15
Model Name XJ1100J
Model Id 10M
Quantity 1
Originally From XJ 1100 J

[jmnjrpa]

That

won't work on a 81 MNS. The one you have should be correct.

[CatatonicBug]

Are you sure the XJ has a larger bore? They list it as 16mm. That works out to .629 while I have not yet checked the MNS has 11/16 on it. That would be .687? Gonna check in the morning. I would not prefer going smaller.

Yep. The XJ runs a 3/4" bore. It says it right on the outside of the MC housing. That's 1/16" larger than the stock LH MC.

[CatatonicBug]

Or, to suck all the fluid out of the MC when you realize you didn't clean it well enough.

I just turn it over and dump it out into my oil drain pan. I would never, ever try to re-deploy brake fluid, especially if it was taken from a known-dirty master cylinder.

[draketrumpet]

I just turn it over and dump it out into my oil drain pan. I would never, ever try to re-deploy brake fluid, especially if it was taken from a known-dirty master cylinder.

Silly, I wouldn't reuse the fluid, but that way, I wouldn't accidentally dump it all over my bike, and I wouldn't have to put the lid back on either...that's exactly what I did last weekend with the mity-vac. Only thing it seemed to be good for without the fittings.