Hi i just need some info on valves before I place an order tommorow.

i will be porting the head and getting the cam reground so whilst getting new valves i was thinking to get A14 valves which are 2mm bigger in the inlet and 1mm on the exhaust

so my question is can i just use the same A12 valve seats with the bigger valves with no sealing issue?

the inside of the valve seat will be opened up abit so it can flow more with the bigger valves.

Thanks!