already thrown all my tools over these brakes

[twitch101]

been working on my 350x rear brakes all day. have bled them and bled them. even ran a hand pump vacuum bleeder on it for an hour and still cant get any brakes out of it. ive rebuilt the rear caliper and the master is new from eastcoasatv (might be reman). either way i know i have fluid all through the system and no air. why am i not getting any pressure built up?

[tri again]

Try taking the lever off the handlebars.
I had one last week that would not return far enough to grab a full load of fluid.

Master cylinders need to have full throw back to resting position
to be able to grab max fluid.

We spent a couple hrs in your situation until someone suggested that.
Bingo, instant brakes.

Hope that's it or something equally ez

[twitch101]

its not connected with the handlbars in anyway. i put a parking brake block off on it. im thinking one of the o rings slipped in the master but i dont think i should have to be the one to tear it out and find that it was messed up when i bought it. it worked fine when i had it on the first time. it only messed up when i went riding on it. before the brakes would lock up just fine.

[tri again]

oh, ok.

Is it foot lever activated?
The point for us was the throw on the master cyl didn't return all the way.

There's usually a little metering hole that lets it grab more fluid
when it's all the way back, might even be a sticky ball valve in there the size of a BB

They can get stuck and not allow more fluid in too.
If you tried bleeding it at the master, did it try to blast across the room?

If the master and slave are at roughly the same altitude, like foot brake to wheel disc, it should bleed.
I forget if it was Jaguar or bmw but we had to take the calipers OFF the vehicle because the bleeder valves were on the bottom of the calipers.
True rocket science.

Air bubbles can sometimes move faster than we can and hide in a high spot.
I t6hink once, we took off a whole assembly and bled it on a bench so everything was level.

Does it seem like the master is creating pressure all by itself?
(a good time for safety glasses too, btw)

I'm off to buy tools to fix my own brakes so I'll check with you later.
Good luck to both of us.

[twitch101]

its om my 350x and yes its foot lever. ill adjust the rod the pushes into it but it doesnt seem like its making pressure at all. i tried reverse bleeding it with a syringe and the fluid wouldnt budge at all. so i threw the vacuum pump on it at the rear caliper nipple and that got fluid moving cause i had to keep refilling the fluid cup.

[jeswinehart]

When I had troubles I traced it down to the parking brake "rod" or long tit or what ever you want to call it. It has the smallest of o-rigs and the darn hardest to replace/re-install.
So perhaps double check that o-ring around the parking brake actuator rod, might be picking up air while trying to bleed air out.

[twitch101]

parking brake actuator? you mean the screw that goes in the caliper? that has a block off plate on it and the screw removed.

[El Camexican]

I don't know your ride, but is the bleeder at the highest point on the caliper? If its not you'll never get the air out. If you get sick of bleeding you can just set a catch can up under the caliper and leave the bleeder screw out or loose. Take the top off the resevior, grab a beer and just keep topping it off with fresh fluid as it does what is called a gravity bleed. When it starts flowing steady tighten the bleeder screw and it done, but be sure there are no places in your line that can trap air or it won't work.

[jeswinehart]

parking brake actuator? you mean the screw that goes in the caliper? that has a block off plate on it and the screw removed.

No, not the the brake acuator but the rod that comes into contact with the adjuster bolt. That internal rod has a small o-ring about half way down the cavity where it travles thru the caliper body.
As i recall, Honda did not even show it on the dealers fish. Howdy from here on the boards tipped me off about it and gave me the # for it. It is the size of the actuator rod or probably slightly smaller and fits inside the caliper body where the rod runs thru. That is what makes it hard to see and even harder to put a new "O"-ring back in,,,, that is where my 350X rear brakes was causing me major fits in getting to bleed air out (and stay out)

[just ben]

I had this problem on the front of my 85 tecate. I bled and bled and so on with no results. I threw my arms and said eff it the next day after touching nothing i got back at it and it had front brakes. bled them out again and they pumped up like they should and have been fine since. did you sell the t3 BTW?

[jeswinehart]

# 37 on bikebandits fish. I swear the Honda dealer ship did not list it but they all use the same parts fish ???
http://www.bikebandit.com/houseofmotorcycles/1985-honda-atc350x/o/m1916#sch19164

[twitch101]

jesus i hate that rear piston -_- it was so hard to get mine to line up and stay center to push back in. i dont think its in the caliper though. i really dont. i just rebuilt it and it was good. i dont think im getting a good stroe on the master after i went and played with it.

ben, no i havent sold the t3 yet. thinking about parting it when i get back home.