Hi I am a newbie here. My bike used to get over and petrol spill out from its Carburettor. I had consult a mechanic and he changed my pressure and clutch plates and clean my Carburettor then after two day after mileage of 25 km approx the Carburettor spill the petrol again , now please tell me what is the exact problem either I've change my Carburettor of just have to clean my petrol tank P.s I've filter also