the oil level has risen in the sump .there is no typical signs of water no sludge .ive drained the oil was looking for water to come out of the sump followed by oil but it was not the case.the level in the rad was down but not by the same amount as the oil level was up .the engine oil smells very much like petrol. i have been having running problems on tickover this was or is due to the demon 650 having casting sand left in the float bowls. and as yet havnt managed to get it running due to the posible water in oil problem. but it revs alright but wont tick over.