Based on the fact that most places sell domes for 701's and domes for bores 84mm and up. I would think if you go to 84mm you need to get different domes. More importantly though, if you go to 84mm you're basically on your last bore for stock sleeves so if you waste your engine, you're buying another cylinder in addition to anything else you may have lost. Some have had success with larger bores on stock cylinders but it's rare.