Had this 450es 2000 3 days now. Couldn’t get the oil dipstick to unscrew. Was riding grandbabies this evening and it kinda felt like it was missing or fuel. Then went dead. Gas tank gauge showed empty. Put about gallon and a half of gas in it. Wouldn’t start, pulled it up the street to house. Took air breather element out and found gas/oil in the plastic breather housing. Used big channel lock pliers on the dipstick and got it to moving. Unscrewed it and gas/oil came running out. Drained the oil and got one gallon and about a half pint to come out. What caused this. Do I need or “HAVE TO”always turn the fuel off when not running. Kinda believe fuel was in crankcase when I bought it. I rode around very briefly on it when I bought it. Got it on my trailer and loaded. The next day while still on the trailer I tried to unscrew the dipstick then and it wouldn’t budge. Today when I did get the dipstick out the o- ring was distorted and blowed out on one side. I am changing the oil and the filter, before starting the engine again what else should I do or examine? This is my first four wheeler ever alsoand it is full time four wheel drive. Steers very hard while trying to turn around at the intersection on my street. Is this normal? If so I dislike that enormously. Are all full time four wheel drives like that? This bike I bought has only one owner, never used in water or abused, everything works and looks excellent. Help with ideas. Do I need a carburetor rebuild or just alwaysturn fuel off. If Ineed a rebuild do I buy a rebuild kit from Honda or who?