Hi all, I am trying to split my engine to change the main bearings after i bought it as i think it sat for a long time. The manual suggests to lay the engine on a pile of rags, and start hitting it softly with a hammer. It Plit to about 1 cm, but it stopped and it wont move anywhere from there. Is there a better way to get it to split? Am i missing something? Its supposed to be a 2004 sherco 250 but when i removed the cylinder it said 0.3L so i dont know.