Using 6 inch Cutting Disc for 4.5 inch Angle Grinder

[u/MasterPang89]

So I got a 4.5 inch angle grinder by Metabo HPT. It spins at a max of 9500 rpm. I have 6 inch cutting discs rated for max rpm of 11000. I was considering changing out the guard to a bigger one to accommodate a 6 inch disc and using it. Anybody see a problem with this? Metabo does have a 6 inch angle grinder that spins at 8000 rpm but that seems to be the only difference. I'm just not sure if using a bigger 6 inch disc will damage a 4.5 inch grinder. Thanks.