Two-stroke engine having variable exhaust port timing

摘要

Two-stroke engine having variable exhaust timing, which includes an exhaust timing control member disposed in the exhaust passage in the vicinity of the exhaust port. The member is of an elongated configuration having a diameter gradually decreasing from the opposite ends to the intermediate portion to provide an external contour of an arcuate sectional configuration. The member is divided into two parts at the intermediate portion in order to facilitate to assemble it in the engine.