Description Model/Year Cyl. Bore Size Sleeve Description Thickness O.D. Sleeve Length Type Brand Part No. 250 hp 1992 6 3.544"(90mm) straight sleeve with ports N/A 3.923" 6.350" RS Advanced 1105SB Cylinder Sleeve: Yamaha 250 Hp 76 Degree 1992 Straight .020 Over Yamaha 6 Cyl 3.544 Bore 76 Degree 250 1992