1.Fine Appearance and good heat dissipation . 2.Clear bore surface. 3.Good oil-restaining . Product TypeProduct KeywordDisplacementTOTAL LENGTH(mm)DIAMETER OF INNER CYLINDER BORE(mm)DIAMETER OF OUTER CYLINDER BORE(mm)YMH113EXP0RT 92.7Φ50Φ64YMH113EXP0RT 92.7Φ60Φ701. IF YOU WANT BLACK ,SILVER,BLUE OR YELLOW COLOR, JUST TELL US , WE CAN MAKE IT .2.FOR POLISHED, NO PROBLEM WE CAN MAKE IT . MOTORCYCLE ...