Honda OEM 91256-096-651 oil seal measures 4.8x14.5x4 for the tachometer gear. Fits all years GL1000 and these Honda models:
CB350 K1-4 CB400 Hawk 80-81 CB400 HAWK II 78-79 CB500 K1-2 CB550 76-78 CB550 Super Sport 76-77 CB550 550 Four 76-78 CB750 Hondamatic 76-78 CB750 K1-5 CB750 750 FOUR 76-78 CL350 K1-5 CM400 Custom 81 CM400 79-81
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