Motorcycle engine with an always spring biased open exhaust valve

An adjustable exhaust port 2-stroke motorcycle engine with a center adjustable exhaust valve or split center adjustable exhaust valves comprising:

• a closing fork or closing arm having at least one fork arm extending from a base portion of said closing fork or closing arm, said closing fork or closing arm having a closing fork base portion or closing arm base portion screwed or bolted to an adjustable exhaust port control rod shaft adjacent to the center adjustable exhaust valve or either or both of the split center adjustable exhaust valves, said center adjustable exhaust valve or either or both of the split center adjustable exhaust valves having at least one transverse post;
• and
• at least one spring disposed between a surface of an engine cylinder and said at least one transverse post, a first end of said at least one spring in contact with said surface of said engine cylinder or a surface mounted to said surface of said engine cylinder, and a second end of said at least one spring in contact with or linked to said at least one transverse post, said center adjustable exhaust valve or either or both of the split center adjustable exhaust valves spring biased open by said at least one spring at all times.