I was having a problem getting my blaster started with the exhaust on. Off it starts up fine. So I took the exhaust off and tried to clean it out with a pressure washer and let it dry. Once I put it back on the bike wouldn't fire up anymore. Someone in the forum mentioned and aluminum gasket was supposed to be there on the exhaust port of the head but it isn't. I am thinking that is the problem. Does that sound right? How else can I make sure the exhaust is clean?