Ok, but I warned you...
A long time ago, I wrote this for the ZRX owners. Then, I wrote it again as an article for Road Bike Magazine. Basic brake bleeding...
http://www.zrxoa.org/webpages/techinfo/brake/bleedbrakes.htmlNow, as mentioned above, when replacing pads, it is very important to clean the pistons BEFORE pushing them back in. An old toothbrush, some simple green and water, or some brake clean (quality brand, not the cheap stuff that will strip paint) works well for loosening up the crud. Clean until spotless.
When you push the pistons back into the calipers, that fluid needs to go somewhere. Chances are, it will go up, and over fill the reservoir on the master cylinder. So, using a Mity Vac if you have one, or a paper towel if not, soak up 1/2 the old fluid that is in there first, to make some room for what is coming up. Keep an eye on it as you go, so fluid does not pour out every where - it WILL eat your paint and ruin the finish on most surfaces. Or, you can attach a hose to the bleeder, crack it open, and push it out that way... but might be harder to do if you are alone... Whatever is clever.
The whole reason you clean first is to A) avoid damage to the dust and fluid seals and B) avoid excess contamination of the brake fluid and system with dirt/dust.
I would use the old pads to push the pistons back - don't risk damage to the pistons with a screwdriver.
Avoid compressed air around the caliper and piston seals. Chances are it will blow past and put air and crap in the system.
One of the best fluids on the market right now is Motul RBF 600. About $15 for a pint, and very high wet boiling point. Only some super expensive Castrol SRF is perhaps better ($80+ per quart!). One pint is all you need. Regardless, wet boiling point is what you need to look for - the higher the better. AVOID any DOT 5.0 fluids (silicone) they are not compatible with the system on your bike, and the water issue can lead to caliper, master cylinder and slave cylinder issues (clutch). You can safely use DOT 3 or DOT 4 fluids, and DOT 5.1 is ok.
And finally - one of the best brake system upgrades you can do is a set of high quality braided stainless steel brake lines with fresh fluid. Orient Express is pleased to offer the superb Spiegler line of brake lines. In stock today, and available in a range of custom colors (may require a short wait). Spiegler braided stainless brake lines make your lever feel firm, and help to communicate what is happening to your fingers better when you squeeze. They do this by eliminating flex and expansion under pressure, and by transferring more of the applied pressure at the lever directly to the calipers.
The next best is a good bleed - before every time I go to the track
