hey i just noticed today that my back Stock Shock Has a Setting on the button of it, so you can turn it. I weight 140 lbs and drive on alot of bumpy roads what number should this be on or whatever thanks!

3 or 4

Should be set on 4 by the factory from my understanding.  My girlfriend likes to ride along with me quite a bit so I had to tighten it up a little.
Note: I had to take off (loosen and move to one side) one of the "dog bones" in order to get the wrench on it.  Good luck.

For whatever it's worth, I am 140 and set mine at 4.  This after reading a web page on setting up sag and taking a few measurements with myself on and off the bike.  It does seem bumpy only sometimes but this setting should also provide proper handling in corners. :dunno: