I had a 2004 700 and the foot brake worked on it for about the first year and then it started getting weaker till it finally didnt work at all !! I heared that they had trouble with the rear master cylinder and that their was a few quick fixes like putting a brick on the foot brake overnight I tried it and it didnt work just like all the other ones !! The only thing I know to do is get a new master cylinder !! People told me the reason it didnt work was because I didnt use it enough but the 2004 sportsman you had to put the rear brake on to get it to go into high range and reverse so I used it plenty !!
I've had four of them go out on my SP800. Two were replaced under warranty, I replaced one myself (back when Ridgerunner sold the parts cheap), and now that one is dead too. So I have one out of the machine to play with if I ever remember to dig it out and see if I can disassemble it...
had this issue on my scrambler was told by the dealer that the master cylinder had blown a seal I spoke to some friends and they said that was hard to do try bleading the brakes, so I did and works good as new so try that.
Since I'm riding the Rubicon Trail this weekend with some friends, I had a renewed interest in my footbrake.
I pulled the original out of a box and was examining it. I couldn't see how to get it apart, but there's gotta be a way. I decided to try swapping back onto the quad just to see what would happen.
So I did... and started pumping the pedal, checking the fluid, to see if it went down. It did a little, then stopped. Then it dripped a little from around the plunger, so I think the seal on that one is bad.
So I picked up the one I just removed and pushed the plunger and just missed being hit in the face by fluid. Hmmmm..
I put the old one back on again. This time I hooked up a plastic line to the rear brake and cracked the bleeder. I added more fluid and pumped. And pumped. And pumped. And added fluid. And pumped some more. Finally when I saw no more bubbles in the plastic, I closed the bleeder. I added a little more fluid to the proper level and closed the cap.
Then I tried the pedal. FIRM!!! Holy cow. Did I just fix my rear brake???
So we'll see. I didn't put the rest of the quad back together; I'll wait a day or so and see if it bleeds down.
So my rear brake works on my 2007 Sportsman 800 but only when I used the hand brake, is the handbrake supposed to activate all three brakes? I replaced the master cylinder with a cheap aftermarket part, then blead the system, then refilled and got all the air out of it. So why is it still not working?
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