Hey all, I just bought my son a brand new 2008 YZ85. We just spent the weekend breaking it in. So now the fun begins. It is obviously jetted for sea level. I am in Utah and the elevation is 4500 feet. So yea I need to lean this out. And yes it is extremely ritch. Has anyone out there done this at this elevation and what did you end up going with? Owner manual say mix the gas at 30 to 1 that still sems quite ritch. BTW what is the factory jets owner manual doesn't say. Thanks in advance.