yes bob there is a set of sliding tumblers in the barrel and the last one is the one that holds the barrel into the lock,when you get the new barrels you will see what i mean,this last one is the one you need to push inwards to pull the barrel out.i have seen people drill small holes in the locks before to get access to push the tumbler in to get the barrel out if there is no other way to get to it.just a pointer on the coguar 125 check the swinging arm bushes they are usually worn as the standard bushes are prone to premature wear simply hold the rear wheel and in the other hand hold onto a grab rail and rock them in opposite directions to see how bad the play is.There are some on ebay alot cheaper then the shops if you need some.good luck with it all,adam.
adam bike doctor, February 2010