First, unplug your saw & clamp it to a work table.  (I like to work about 40" off the ground)

Wear eye protection for this, sparks will be flying

Using a Cutoff Wheel (#918834) wheel from Sears on your 1/4" die grinder

Trim the thickness of the cutter tooth down to 2/3 it's original thickness.  Do this  slowly to avoid a burr

Using the cutoff wheel grind the top down on the little guide tooth in front of the cutter.  Try to cut them all down the same amount. (we remove 1/3 -1/2 of the height

Nip the back corner off (at an angle) of the cutter tooth.

This will allow the chain to travel over the tip easier

Now sharpen the chain.  (even a fresh chain out of the box isn't sharp enough for me)

Do all of the above at your own risk!!!

These methods will create a very fast saw, however they remove some of the safety features built into a chain for cutting wood.  DO NOT EVER use this chain on wood.  It will kick back & bite you

I was using a chain modified in the ways mentioned above on a piece of wood (Bad Idea).  It kicked back & gave me over 30 stitches (9 below the skin)

Sometimes a picture is worth a thousand words!