I have a 2004 kfx 400 and i had the vavles ajusted maybe a month ago and the other day i was riding and it shut off like it ran out of gas and i had plenty of gas and the over heating light came on and now it wont start has good compresion and getting spart getting gas what can be wrong and another thing is when i turn the key on the over heating light will stay on until i crank it over then it hoes off never has done that please help