Buy one of them 10 dollar kits. Its basically a bottle, with a tube that connects to the bleeder which creates an air tight seal. As you pump the breaks you will see the fluid transfer to the bottle with most likely air bubles in it. Eventually as you pump the brakes it will become solid fluid ala no bubbles and the line will tighten up. Then tighten the bleeder, fill your resevoir and your allset. Dont forget to keep the resevior full as you bleed them, dont let it get empty or your starting from scratch.
'04 YFZ450, Cam Mod, No-Lid, Filter, K&N/Outer, Relocator, Yoshi Full, CDI, Needle, 45, 168, 3.5, Zip, Nerfs, Guards, Skids, A/C Bumper, +1 Douglass w/ Maxxis Razor 2, etc ..