So I got this four wheeler yesterday. The people that had it before ran it hot. Seems to have blown head gasket when I drained the oil it was pretty milky. Secondly they tried to fix it and couldn’t figure out and there are some bolts missing or stripped from some parts that need them (cylinder head) So my question is where is the year model in this thing? They weren’t exactly sure. When I google the model number there is about 7 Klf400bs. The later 97-99 year models Diagrams look close but I would like to know for sure so when I order what I need I get the right thing. Any help is appreciated. Also at the front handle bars under the plastics I found a oil gas mix tank and I’m trying to figure out why it’s there to my knowledge it’s a four stroke.