REAR ARM, STRADDLED VEHICLE AND MANUFACTURE METHOD

摘要

A rear arm (15) comprises a right arm (3), a left arm (2) and fastening members (5a to 5j). The right arm (3) is produced by integrally casting a front right portion (3F) and a rear right portion (3B). The left arm (2) is produced by integrally casting a front left portion (2F) and a rear left portion (2B). The front right portion (3F) of the rear arm (3) and the front left portion (2F) of the left arm (2) are joined by the fastening members (5). A support boss for supporting one end of a rear suspension is integrally formed on only one of the right arm (3) and the left arm (2). Thus, the right and left arms (3,2) produced by die casting can be easily joined without welding, and still sufficient stiffness is ensured.