2mm overbore?

[christopher21]

I have an 83 atc250R and I recently honed out my cylinder. After measuring it, I found the bore to be 72mm. I know the stock bore is 70 for this year. Does anyone know if this is too big? Or maybe if I ran race gas ? Possibly run it a little rich? What is anyones opinion?:confused:

[Mr. Richard]

2 mm is .080 over which would be the last bore,,,,,,,,:D :D :D