What is the fuel mixture for 2004 Yamaha yz125?

Sign up at myyamaha.com and download the service data sheet for your bike which lists the stock engine oil type and ratio. https://www.yamaha-motor.com/sport/myyamaha/login/L3Nwb3J0L215eWFtYWhhL2hvbWUuYXNweA==/starthere.