Traded for a 2006 YZ450F, Got home, rode it for bout 5 mins and it quit...w ended up putting an o-ring on the metal tube that runs frm th radiator hose setup into the top end. filled it up with coolant. Went and rode and it leaked bad out of the weep hole. We rebuilt the water pump, Seals, bearing, shaft, not a new impeller. filled it up with coolant, rode....but....it would get hot, as normal, then start acting up and missing, eventually, it will bog down like im running out of gas. i can set there for a little while and let it cool down a little bit, then ride for a few minutes longer, but it does it again. i got home and looked in the radiator and it was empty. Well, i say its empty, i cant see any in it. it doesnt blow white smoke out the exhaust, and as much as i can see from the dipstick, there isnt any water in the oil. Wheres my coolant going? Also, would the oil be milky with Engine Ice in it? Me and my dad are lost!