How to bleed brakes with a brake bleeder. Bleeding rear master cylinder on Motorcross bike.

Tutorial on how to properly bleed your brakes using a brake bleeder. YZ250F example using Sears Craftsman brake bleeder. Review on the brake bleeder to be posted soon. Please subscribe and thanks for watching!

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Autos & Vehicles

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• suzuki
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• 2 stroke
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• kx250f
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• RM250
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• bleeder
• bleeding
• brakes
• sears
• yt:stretch=4:3

[Lethaltactics]

Hey Johnny, awesome videos. I have a 2008 yz250f and when I bleed the rear caliper with the bleeder gun, I am consistently getting little air bubbles and they never stop. I fill the reservoir up every time it get low and keep bleeding but tiny air bubbles never stop coming through the line. My brakes work,but I feel tho as if there is a bad seal maybe and my brakes are not 100%. If I pump the rear brake and hold down the pedal then the crack bleeder screw it just dribbles out.Is there a problem?

[Johnnysshop]

@Lethaltactics How many times did you bleed them? The rear brake is almost impossible to bleed with new lines. I did it 7-10 times before the rear brake felt dead on. If it's still won't bleed, have you checked the orings on the caliper pistons? Seals on the master? Only other thing to check is the line itself.

[sholmes52]

Thanks for the demo. Very helpful.

[Johnnysshop]

@sholmes52 Thanks!

[sholmes52]

@Johnnysshop: I purchased one of the $34 units at Auto Zone. No way I could have bleed the breaks properly without someone helping if I had not had the tool. The instructions and various comments on you video were very helpful.

[Johnnysshop]

@sholmes52 Glad I could be a little help to ya. The AutoZone unit decent?

[DrSaxxy]

@Lethaltactics Hmm maybe you do have either master cylinder or air in the system problems, because you should be able to lock and skid the rear tire at low speeds fairly easily if you're hard on the rear brakes.. if you can't do that there probably is something going on. Good luck, I hope you can track down the problem and fix it!

[Lethaltactics]

@DrSaxxy Yeah I was thinking about that. I just feel like sometimes my brakes are weak. I mean when I put it on a stand, spin the wheel and push the brake pedal down, it stop the tire and the pedal is really firm, but when I'm riding I just feel like the rear brake doesn't stop the bike like it should. Also I had to use a bleeder gun too bleed them. Is that normal? Doing the pump pump pump, hold, and crack the bleeder would not work, no pressure would build up.

[DrSaxxy]

@Lethaltactics Not sure if this applies to you or not, but keep in mind that often a stream of small bubbles will be sucked into the fluid in the bleeder tube from between the tube itself and the bleeder nipple, or sometimes even be sucked through the threads of the loosened bleeder nipple, then up and out the bleeder tube.. these aren't coming from the brake line and aren't a problem really.

[sholmes52]

It is definitely made for commercial use but worked great for a novice like me in my home garage. I definitely would purchase it again. It is actually a Mityvac packaged using the OEM brand name and part number 25136.