I had a big bore engine that blew the factory paper gaskets out along half the base circumference of the cylinder. It wasn't warped just not enough beef in the gasket to hold when it's so thin. These stainless steel Cometic MLS base gaskets seal like nothing else. Totally dependable and easy to use. I highly recommend these for your build even if you don't have troubles, these will assure you never will. Just install and torque as specified and ride your bike.