I think I know the answer just wondering ofbthere is any moree knowledge out there. Recently bought myself a 200 gsxr srad 600 picked it up last week. Firat thing I did was a change of oil and filter as its been sat for a while. saw nothing unsual, a small bit of whitish sludge on oil cap but that was all. Was a few days after that I took for a short ride when it started over heating. I pulled up let bike cool down and checked water......which was full of oil. Draibed that and refilled but continued to mix. Got home dropped the oil and it was the same consistency that was in the rad. Drained all fluids, checked headgasket which was fine but replaced and no oil or water in the head. Changed both seal in water pump which looked knackered, so I though maybe a result. Filled with oil to flush all gunk out, did firat drain then went to flush rad on second go. At this time I had the sump plug out as I was filling with water and it went in one end and straight out the plug. The engine is still in the bike and im trying to work out with limited time to either strip the engine to try and find a big hole somewhere and be disapointed or if therea another solution or just throw another engine in it. Preferably fix but wanting your opinions please.