Bleeding rear brake caliper is not an easy task

[660raptor]

They used to be a one man kit that you coonect to a spare tire to pressurise a charge bottle. Dont see them now
Spare was always flat:D

Now you are really coming up with some good ideas. I will try to get an oil can 1st as this is probably the cheapest option. Problem is I live right in the sticks and do not expect anywhere local to sell them. I cant remember seeing an oil can for years but on the other hand I have not been looking. There is a cheap warehouse that have good selection of really dodgy tools they may sell one but I expect it will not be upto the job pressure wise. There is a builders merchant aswell that Im hoping is my best bet.

Failing all this I will have to order one of these kits online which I think is a dead cert to solving my problem. £34 sounds pricy but on the other hand I will have something that I can use in the future inevitably when my brakes need doing next time.

I think my family is hooked on quads now and my son should really get into a club and start racing. So all these tools etc I purchase will "come in". I will be looking to change both my quads for branded ones that are better build quality but whilst we are still learning we might as well brake a cheap quad rather than an expensive one. I want a good quad of my own as Im sharing the kids. I quite fancy a raptor 660 but cant warrant spending the money on myself just yet.

Thanks for all the ideas guys I will keep you posted to the outcome.

[bouncy]

What a good thread, cant wait for the outcome:) :) :)

as everyone is trying to solve the problem, might as well add some more.

Firstly these quads have very small displacement master cylinders, so casual pumping of lever does not move the air along the pipe, well it does but when you stop it travels back up the line........:mad: :mad:

Secondly make sure you have about 3 litres of brake fluid, "your gunna need it"

Thirdly, make sure you have your brake lever adjuster fully wound out, this gives you more movement on the master cylinder.

Fourthly, get her indoors into the garage where she can be useful.

Right your ready.

Res cap off, fill it with fluid, get the missus to pump the lever all the way down..VERY VERY Quickly and I mean QUICKLY and hold down, then open bleed nipple straight away. Close nipple and release lever.

Do this procedure till you have used nearly a litre off fluid.:D :D :D If you get resistance, GREAT and put the other bottles away.

If you dont get resistance, try same procedure till youve used another bottle.
If still no joy, SLAP the missus and blame it on her.........:D :D :D :D

Another way is just to leave bleed nipple open and let gravity take its course and let it self bleed.

Main secret with bleeding these is to be patient because they are a twat to bleed, I know you have been tested to the limit but believe you me, ive spent hours trying to bleed these things, Ive even used proper fluid suction kits etc and still no Joy.

Just make sure brake hose aint swelling out when you press lever aswell as this will give you spongy lever. Sometimes you can reverse the seals in the master cylinder too. Also if you think you have all the air out and still no resistance, you can get a brake clamp and clamp it down the hose at different intervals to check for where the prob lies.

Good Luck

[Admin]

Originally Posted by bouncy

What a good thread, cant wait for the outcome:) :) :)

as everyone is trying to solve the problem, might as well add some more.

Firstly these quads have very small displacement master cylinders, so casual pumping of lever does not move the air along the pipe, well it does but when you stop it travels back up the line........:mad: :mad:

Secondly make sure you have about 3 litres of brake fluid, "your gunna need it"

Thirdly, make sure you have your brake lever adjuster fully wound out, this gives you more movement on the master cylinder.

Fourthly, get her indoors into the garage where she can be useful.

Right your ready.

Res cap off, fill it with fluid, get the missus to pump the lever all the way down..VERY VERY Quickly and I mean QUICKLY and hold down, then open bleed nipple straight away. Close nipple and release lever.

Do this procedure till you have used nearly a litre off fluid.:D :D :D If you get resistance, GREAT and put the other bottles away.

If you dont get resistance, try same procedure till youve used another bottle.
If still no joy, SLAP the missus and blame it on her.........:D :D :D :D

Another way is just to leave bleed nipple open and let gravity take its course and let it self bleed.

Main secret with bleeding these is to be patient because they are a twat to bleed, I know you have been tested to the limit but believe you me, ive spent hours trying to bleed these things, Ive even used proper fluid suction kits etc and still no Joy.

Just make sure brake hose aint swelling out when you press lever aswell as this will give you spongy lever. Sometimes you can reverse the seals in the master cylinder too. Also if you think you have all the air out and still no resistance, you can get a brake clamp and clamp it down the hose at different intervals to check for where the prob lies.

Good Luck

nice post lee

[shurflo]

Originally Posted by bouncy

What a good thread, cant wait for the outcome:) :)

eBay.co.uk "for sale - two chinky quads - one needs brake bleeding but been told it is an easy job to do" :D :D :D

Wow! Cheers Allenltz400 some pretty sound advice. Will get loads more fluid and give it a whirl. Also still trying to get a pump action oil can but struggling so maybe this is the answer to my prayers You sound like you really know what you are talking about. This is what I have been waiting for. Someone who really has been there and done that (I mean the brakes not incinuating anything else).

Shurflo: As for the guy on ebay if they are that easy to bleed why aint he done it. Why why why? If I was selling anything that was perfect other than one 5 min job then surely you would fix the problem and have it fully working. Some people really "P" me off. Some poor fool is gonna end up buying that quad and posting threads on here how to bleed the buggers. Hopefully by then we can all say check out this thread. I feel like bleeding him see if he likes it. :mad: :mad: :mad: Thanx again guys for all your hard work with this epic brake issue. You guys are the best. :cool:

Sorry Bouncy I just gave allen credit for your original post. :o Sorry allen I got to give it back to rightful owner. He deserves the credit for a post like that one.

Just one quick question for Bouncy:- When I got the res cover off and she indoors is pumping really fast what do I do about the fluid spurting about 2 foot high out of the res. I have been covering with a rag but thats been absorbing most the fluid so have to fill up more often. I then tried pushing my palm tightly over where the cover went and this gave me compression when pumped fast but when loosed lever again this went.

Just because I have been looking everywhere for leaks and when the spurted out fluid eventually runs down the plactic :eek: (Yes I know this is bad for the plastic) it drips on the floor and I think I got a leak. But not really just spilt fluid.

[shurflo]

Originally Posted by mafadecay

Shurflo: As for the guy on ebay if they are that easy to bleed why aint he done it. Why why why? If I was selling anything that was perfect other than one 5 min job then surely you would fix the problem and have it fully working. Some people really "P" me off. Some poor fool is gonna end up buying that quad and posting threads on here how to bleed the buggers.

It was a joke M8.....I was meaning that was how this thread would end.....YOU selling them on eBay with that description.....LOL :D :D :D :p

Sorry I must have fluid on the brain or something (Brake fluid that is :D :D :D ) lol.
Went straight over my head. Really getting snappy about these effin brakes. Saying that today bought a bit closer to a result.

Me and mate spent couple hours doing bouncy's trick and they seem a lot better. I reakon we put about a litre and half through so far. Really hurts your arms and have to pump super fast. I don't think I am that far away now but we had to knock it on the head as was getting late and needed to have dinner and get more fluid as my used fluid has little bits of debris and stuff in it.

Will try again tomorrow if I get chance.

[bouncy]

Just put cloth over res. Once you feel as though you are getting some resistance, just resort to bleeding them as normal.

eg. gently pump the lever until you feel that little bit of resistance, keep brake lever pressed ( but not over hard) and open nipple slowly and watch the air come out.

There is a trick to doing these and when i fitted the Raptor brakes it took me about 1hr to get a good brake. When i fitted the braided hoses on the YFZ, first time took about 20 mins, after yearly rebuid it took about 2 hrs.

Also ive found that wrapping a tie wrap around the brake lever and handle bar to keep it pressed and leave it overnight often makes the lever much better...........:D :D