- May 15, 2010
So i got a 2010 yz125 about a month ago and im still not sure who to believe in terms of the oil and gas mixture. Note, this is my first time riding a 2-stroke. Right now i am running 40:1 with yamalube oil. The manual says, 32:1 and one dealership told me 50:1 and another told me 40:1. The bike smokes quite a bit on start up then kinda dies down once i start warming it up and riding it. Any ideas on what i should do. This is a brand new bike so i want it to last me as long as possible and i would like to keep it in the best of shape.