Been working on this 95 formula ss for about a month.checked and rechecked the rotary valve timing seems right on . Checked the timing over and over seems good. Engine will fire and run for a short time then stop. Has new stator. New coil. New cdi box. And new carburetor kits installed. I'm done let someone else who knows more than me have a shot at it. Trying to sell whole sled it's in pretty good condition. But if I can't I'll start selling parts.