Amervo, revving the snot out of something rarely "cures" anything besides pent-up frustration and can very likely cause damage if the timing or jetting is faulty or there are mechanical issues. A systematic approach to solving the problem usually gets results (not always but mostly) and is much easier on the engine.

Reading the thread from the beginning to see what clues are given helps. Paying attention to the facts that are presented helps too. And when the problem is solved and the reason is given (thank you for telling us, a lot of times we're left wondering!), maybe it should be appreciated instead of questioned.