I have been fighting my brake issues for a few months now. I get fed up with it and let it sit for weeks at a time.

The quad is a 97 400L SPORT 3 brakes 2 in front and one on the side for the rear.

Lets start off saying they worked OK when I got the bike from a friend. I bled them. (just like I would a car) done it before, and they were awsome. Stopped on a dime. Few days later No brakes. The diaphram covering the master cylender was shot. I scrapped it for a new one.


Symptoms. NO pressure=no brakes

Their is no fluid leaking from anywhere. Went as far as pulling all the bleeders out 1 at a time and flushed each brake. Today I pulled the whole MC off and made sure it made pressure with a finger test on the end. It seemed to. I have nothing to compare it to.

I installed 2 new bleeders. Thats all the store had for me. They are the speed bleeders. THEY ARE AWSOME. Their is a check valve built in so all you do is loosen the bleeder 1/4 turn and pump the brake until all air is gone from the system. I put 1 in back and one on the FR. I redid the system. I still have no pressure. I was told that I do not even need the MC cover and gasket on while doing this. For it is mostly just a seal and diaphram. When pulling the lever I can see the brake fulid churn in the MC. I thought the fluid level would just drop. I am no master at this, but it looks like the fluid finds its way back into the MC when it is compressed by the lever(piston). Could a seal be bad on the piston and all the pressure is let back into the MC? Boy this sucks.

Please someone help!

 

Ok, I pulled the whole MC/lever off again. this time I put a bolt in the end of it to make sure the seals werent leaking. I felt pressure with my finger, but I didn't know if that was enough. I called Rick Ritter. He said to do the bolt thing. Then also for me to make sure I do not have any high spots in my lines for air to get trapped in. The bolt idea concluded my MC was indeed shot. I figured out how to pull it appart and it is gawed on opposing sides of the piston. The metal the piston goes in is also marked up. I am unsure if I want to rebuild with a rebuild kit. Or replace the whole unit. If I get a whole unit. I read somewhere that I should get a newer one, because of a better design. Or go with a Honda 400 one, and retrofit it. any ideas?