Hey All, I am rebuilding my 650R. I looked at the head after I pulled it apart. The siloette that the gasket makes on the head leaves a lot of unused area. Would it be wise to grind the head down and smooth it so that it goes to the extent of the gasket? Please help me I have my grinder ready? Thanks P.s sI know that this would lower the compression ratio but I am going to bore the cylinder out to 102.4 and put in a 11:1 piston in it. Thanks for the help.