I let my bike warm up. At idle it sounded fine. Once I started to ride it around it would start to falter. At this point I took to spraying water around the intake manifold joints. Shortly after you could see drips of water coming out of the air intake as well as bits of steam. I assume this means that air is probably seeping into the manifold and casuing the sputtering issue. How much of a job is it going to be to replace the manifold? Do I need to replace the manifold? Should I just replace the gaskets? If so how difficult of a job is that? Do we have any links describing how to?