Hi people, From argentina again, hahaha. The other day i was ridding on my recently build 2 stroke bike when i hear a "clack" sound, and i see that the plastic part of the tensioner that turns around and guides the chain like moves from right and left, only the plastic part, the metal part is welded to the bicycle. So this makes the chain go to the centre part of the wheel and finally it goes off the sprocket. Guyyyss, WHAT CAN I DO!!??? HELP pleassse. Thanks again.