I HAD A REBORE ON MY 1976 RD 400. I NOTICE THAT THE BORES ARE LARGER THAN THE HEAD GASKET BORES . ANYONE KNOW IF ITS OK TO RUN AS IS OR CAN I GET A GASKET WITH LARGER BORE HOLES SO THAT THE COPPER GASKET WONT BURN AWAY AND MESS PISTONS UP. ANY HELP WILL BE APPRECIATED . THANKS