Hey Guys I got a quick question for ya. I have a 1988 kx 250 cylinder that is toast. I have a used 1989 cylinder that is in good condition. These cylinder are the same except the Center Exhaust valve Flapper, the flapper for the 1988 will not fit the 1989. Can I run this cylinder with out the center flapper and what will the down fall of doing so be? Thanx For All the Help.