['04crf150f]

How often should it be changed, how do I tell when to change it, and how do I change it.

[chondamx]

This should be a part of your biannual matainence, which means change it at least every two years. You take the brake line off of the caliper and bleed your line then fill it back up and pump the air out that's in the line.


Chris

[VHD]

"This should be a part of your biannual matainence, which means change it at least every two years. You take the brake line off of the caliper and bleed your line then fill it back up and pump the air out that's in the line.

Chris"


Be very careful. This has to be right. If you are in dought about your skills, pay to have this done. With that said I agree with Chris. To clearify one point, that is to after reconnectiong the brake line and refilling the reservoir, you need to bleed the system. There is a small bleeder screw at the bottom of the caliper. Crack this open and slowly apply the brake. Then before releasing the brake close the bleeder, then release the brake. Repeat a few times. Now do it a few more times only this time before opening the bleeder pump the brake observing the feel of the brake (solid firm is good spongy is bad) with pressure applied to the brake crack the bleeder very slowly and close before the brake handle is bottomed out. Repeat this until a firm brake is felt and no more bubbly spitting fluid from the bleeder.

NOTE: don't let the brake reservoir go empty anytime during this procejure or you will have to start the bleeding process over.

Mike

[deedu]

What happens if you dont change it?..what will it do to your brake lines and such?

[VHD]

You could lose your brakes and the worst part without warning. I ride a 98 xr400 that I bought used. Rode it for the first season with no problems. One time after just coming back from a hard ride and putting around the camp the brake pedal went right to bottom with no rear brake. Good thing it waited and not when I really needed it. I took the master cylinder apart and found it to be gummed up inside. My experiace with cars is that I always got some symtoms felt in the pedal when a master was going out. I never had a car master work one minute and not the next. When this happened on my motorcyle it scared the sh*t out of me. So this is now my motivation to flush the fluid from time to time. I don't know if the fluid was ever changed on my bike and it was 4 years old when it failed. I also don't know how much it has been ridin befor me, so the Biannual as mentioned by Chris might be good. Thing is it is so easy to do, I think I will do it annually.