I live in Michigan. Changed by oil last week, drained 950ml out and put 950ml of new oil back in. All was great until today. It puked oil out of the air filter . My question is it due to temperature? I have been riding it without issue(100 miles or so) but now that the weather is warming I have the oil problem. I understand it is not unusual, but I just want to make sure I'm not hurting anything. Also anyone know where I can find an air filter for it? This winter I hope to put Zip-ty racing breather vent and drain back kit. Any help is appreciated!! Thanks Matt