Hey guys, I finally had a problem with my beloved 2006 WR450 with almost 7000km on her. Im seeing alot of milk in the oil, Im guessing it's coolant however the overflow bottle is not low, but it don't take much to contaminate it. I flushed the system out three times, getting her hot between each time. The oil looked like new after the second flush but done another one for good measure. About a week later the oil was just like a milkshake again. Are these known for cracking heads or leaking head gaskets? I always noticed a little milky sludge in my oil filter whenever I changed it for the last 2 years so that never worried me but this does. Any suggestions? if it is the head or gasket how hard is it to change? any links to how to videos or anything to help? I have the manual but like to see a video or hear from others who done it first...... Thanks in advance.