I have an 06 yfz quad i recently bought. I did the oil change and replaced the coolant with engine ice. I rode for about 15 mins and it got hot and stalled. Got it started and smoked blue like crazy. looked in the oil resivior and it was really watery, not milky but watery. tore the top end apart and the two head bolt under the cams were hand tight....great! thought it was the head gasket, replaced and no such luck. started it again and no smoke but after it got hot and cooled the oil res was full again!!! got new water pump seals but have not replaced yet. the old ones didnt look too bad but i need a gasket first. head and jug look good, no cracks, and im gettin real frustrated with this damn quad.
PLEASE if anyone has any idea let me know. Thanks The quad does run and start great just cant figure out why theres cooland it the oil, i did drain the coolant and it looked a lil dirty too. but nothing was milky