REAR FRAME FOR TWO-WHEELED MOTOR VEHICLE AND METHOD OF CASTING THE SAME

摘要

A rear frame 5 of a motorcycle 1 is of a longitudinally elongated shape and provided with a pair of right and left rail parts 5a connected by a plurality of cross members 5b. The rear frame 5 is formed by die-casting and a plurality of gate parts G1 to G5 to pour the molten metal through are located separately along the rail parts 5a. It is possible to shorten the metal pouring process and prevent casting defects such as underfills.