Hi everyone, my bike , GasGas Fse 450 has a problem and no one (even mechanics) know what could be. It's losing power and the engine oil is going out through the air filter. I've change the oil and have put the measure that the brand recommends 1200 ml and a new oil filter, i've clean everything and the oil is always comming out and the bike its clearely losing power.I don't see relevant quantity of smoke, just a litlle little bit when push hard the engine. Anyone with opinion? Sorry language mistakes.