Here in S America everything is cheap and of low quality because everyone is poor. The sleeve obviously was of a low quality metal. I use good quality synthetic oil so thats not why it wore down so fast. The sleeve, custom windowing, and install only cost $50.
Yes I know that I can have it bored and then install a larger piston. But I want a good quality sleeve in it, not this ****. I don't want to take it to their shop every 6 months for a rebore or resleeve.
They don't offer any quality sleeves because theres only about 4 guys in town who are serious riders that have plenty of cash. And maybe they don't even know that their sleeves are crap.