Brake fluid leaks!

[coelgrim]

Omg, i just see it ! the front break fluid is leaking from its host!

I wipe and clean it but after some event (i dont know what triggers it to leak) , the fluid just come out again!

any one experienced it before? is it normal ?



here is the photo :

[rojoracing53]

Has the lid ever been removed before?

Did you remove the lid after you saw the leak to inspect the rubber seal?

What the current oil level at in the sight glass?

The reservoir isn't really under much or any pressure during normal operation so unless your reservoir is way to full then your not forcing the child out, it's just splashing around and seeping out.

It looks like the rubber seal has fail because its cracked or maybe pinched because someone didn't put it back together right. If you don't see anything wrong when you take it apart then clean the rubber seal along with the edges of the reservoir then reset your oil to the proper level and put it back together and go for a ride. If it still leaks then go buy a new seal and repeat that last step with a new seal.

Hope this helps.

[lgk]

Did you add fluid recently?

If so it could be the diaphragm is seated incorrectly. I would remove the cover clean and inspect it then check the diaphragm for damage.

[coelgrim]

Originally Posted by rojoracing53

Has the lid ever been removed before?

Did you remove the lid after you saw the leak to inspect the rubber seal?

What the current oil level at in the sight glass?

The reservoir isn't really under much or any pressure during normal operation so unless your reservoir is way to full then your not forcing the child out, it's just splashing around and seeping out.

It looks like the rubber seal has fail because its cracked or maybe pinched because someone didn't put it back together right. If you don't see anything wrong when you take it apart then clean the rubber seal along with the edges of the reservoir then reset your oil to the proper level and put it back together and go for a ride. If it still leaks then go buy a new seal and repeat that last step with a new seal.

Hope this helps.

thanks for the reply.

what do mean by lid? and the rubber seal? where is it?

i really really have neither idea nor experience about brake, I and nobody else never opened it, serviced it. so the fluid just happened to accidentally leaked out ! when there was an oil, I just wiped it with cloth

and the brake works just fine ! but I m worried about it

where should i check first?

what should be good position of steer to check the level of reservoir?

[coelgrim]

Originally Posted by lgk

Did you add fluid recently?

If so it could be the diaphragm is seated incorrectly. I would remove the cover clean and inspect it then check the diaphragm for damage.

thanks for replly

nope I didnt any fluid recently, and So did nobody.

so should I open the cover of reservoir brake, and inspect if anything's wrong ?

[rojoracing53]

Remove the two Phillips screws on top and carefully pull off the lid, Under the lid there is a rubber gasket that seals the reservoir. Clean the aluminum lid with some brake cleaner and inspect the gasket for any tears. After cleaning the gasket make sure your reservoir is filled to the middle of the sight glass and reassemble. Go for a ride and see if it still leaks.

[lgk]

Agree with Jason.
Once you check the gasket, you'll see where the leak is coming from.

[coelgrim]

Originally Posted by lgk

Agree with Jason.
Once you check the gasket, you'll see where the leak is coming from.

Originally Posted by rojoracing53

Remove the two Phillips screws on top and carefully pull off the lid, Under the lid there is a rubber gasket that seals the reservoir. Clean the aluminum lid with some brake cleaner and inspect the gasket for any tears. After cleaning the gasket make sure your reservoir is filled to the middle of the sight glass and reassemble. Go for a ride and see if it still leaks.

thanks both for replying so fast
will do it later(now already 12pm here ) , and I will post the picture here

how about brake cleaner? I just heard it now, will check in the nearest store tomorrow. what if I couldnt find one? can i just use water or something?

i assume :
lid = reservoir cap.
and
rubber gasket = diaphragm.
are those correct ?

thanks

[DaBlue1]

Originally Posted by coelgrim

....what do mean by lid? and the rubber seal? where is it?
....when there was an oil, I just wiped it with cloth
....where should i check first?
....what should be good position of steer to check the level of reservoir?

Do you have a copy of your owner's manual?

BTW, when you wipe brake fluid, make sure you use a wet cloth then dry thoroughly. Any residue of brake fluid left on a painted surface will eventually make the paint peel.

[Motofool]

Originally Posted by coelgrim

..........where should i check first?

what should be good position of steer to check the level of reservoir?

Did you turn the reservoir upside down while you were adjusting the steering locknut?

If so, there is nothing to worry about, unless the level is too low now.

Check the fluid level through the glass window in the reservoir while the handlebar is in the neutral (center) position.

Half height of that window is an OK level for the brake fluid inside.

There is a neoprene diaphragm under that cover that isolates the brake fluid from the atmosphere.

Those screws that hold the cover are very hard to remove, specially if you don't have a JIS (Japanese Industrial Standard) screwdriver.

Yes, you can use just water and a rag to thoroughly clean the mess.

[coelgrim]

Originally Posted by DaBlue1

Do you have a copy of your owner's manual?

BTW, when you wipe brake fluid, make sure you use a wet cloth then dry thoroughly. Any residue of brake fluid left on a painted surface will eventually make the paint peel.

i have both owner and service manual (but both are confusing to me )

thanks for ur information

[coelgrim]

Originally Posted by Motofool

Did you turn the reservoir upside down while you were adjusting the steering locknut?

If so, there is nothing to worry about, unless the level is too low now.

Check the fluid level through the glass window in the reservoir while the handlebar is in the neutral (center) position.

Half height of that window is an OK level for the brake fluid inside.

There is a neoprene diaphragm under that cover that isolates the brake fluid from the atmosphere.

Those screws that hold the cover are very hard to remove, specially if you don't have a JIS (Japanese Industrial Standard) screwdriver.

nope, I only tightening the nut , just make steering to go left and right.

I think the level is fine, I can only like a bubble in the glass.

Tomorrow i will upload the picture (now already dark in garage, I scared to go there)

must use special item huh! dont have one

thanks for information about water !

[Motofool]

Maybe the previous owner overfilled the reservoir and now the pistons in the caliper got separated for some reason (steering rapid shake?), sending fluid back to the reservoir and over-flowing it.

If the front brake works OK and has a firm feel, there is no need to open the reservoir.

[rojoracing53]

Yes you can use water and soap to clean the brake fuild but don't get any water or soap into the reservoir, you don't want water in your braking system. I use brake cleaner because to kills oils on contact and evaporates immediately so you can see if new leaks develop. Here a quick video of what to do don't mine the break in the middle, after all I still have work to get done

Link to original page on YouTube.