I'm brand new to the atv world.  I bought my son a cheap atv to learn on.  Since then its been a learning curve on how to work on them.  I'm not mechanically inclined but I have common sense.  The rear brakes on the 110cc atv quite working.  I can push the foot lever all the way down with no resistence, and the brakes obviously wont apply.  They have worked fine for 2 months and now they don't.  I have been reading alot of stuff and would like to bleed the brakes. Problem is I'm not sure what i'm looking at.  The brake pads look good still, but i dont know what the bleeder screw(or valve) looks like. Can anyone help me?  

the bleeder screw is on the brake caliper, it has a hole in it.
it should be an 8mm or in standard a 5/16 bleeder.

pump the brake lever 5 or 6 times and then hold the brake lever and loosen the brake bleeder screw.
if it has air in it, it will pump out fluid and air bubbles.

but be sure to check the brake fluid first to be sure there is adequate fluid in the master cylinder.

and refil as necessary while bleeding.
and put the master cylinder cap back on before bledding again.  

thanks wolf i'll give it a try