MY 98 GRIZZ 600 BLOWS ALOT OF OIL OUT THE VENT HOSE. IT DIDN'T DO THIS UNTIL AFTER A TOP END REBUILD (PISTON AND RINGS AND CYL HONE). ALSO IT SEEMS TO GET VERY HOT. THE REBUILD WAS A RESULT OF A TOP END FAILURE DO TO PISTON SEIZURE FROM A LACK OF OIL. I DONT KNOW WHY IT USED ALL THE OIL IT DIDN'T SMOKE. PLEASE HELP ME THIS IS STARTING TO GET EXPENSIVE