Originally Posted by anotherguy
At 86.5 MM the liner is bound to be thin. A suggestion or two. First run 32:1 fuel/oil ratio. Second,run race fuel. Not necessarily high octane but a good leaded fuel. I like the VP U4 series. My YZ is only on the second oversize and when I rebuilt the crank it was only to balance but if it's in my hands it gets new bearings. There's much to be said for good fuel and I'm sure much will be said.
Sounds like good advice, because the fuel here is awful. I'm having the compression lowered slightly, for that reason. I'm sure it well still have more than enough power for the woods. All those trees coming at you, makes ya think your going fast anyway.