Grind/file off the rivet heads on the last link you want to remove, pop off the figure 8 shaped plate and push the link out. Look at your master link, you want to make the break point link look kind of like that.
Or take the chain to your local motorcycle shop and buy a chain breaker to fit.
You can buy a chain tool at any bicycle shop or bike departmemt at Wal-Mart.I think by the sound of things your best bet would be to go to your local bicycle shop to buy it so they can show you how to use it.
Ok, I took it t a bike shop, they shortend it for 5$. I attatched the masterlink and I was walking it to the gas station to pump the tire and buy gas and the master link fell off I found the thing that looks like ad 8 but not that little black pin thing that keeps the "8" from falling off. Will apoxy glueing the "8" thing to the 2 pins pokeing out work? or do I have to bust out the metal detector?