Shop › 1615 Bush 1 1/8″ Bore 5/16 Keyway Image 1 of 1 1615 Bush 1 1/8″ Bore 5/16 Keyway $38.50 Quantity: Add To Cart Added! 1/4” Keyway1 1/8″ BoreSuitable for Honda GX690 engines or any engines with a 1 1/8” shaft. You Might Also Like 2517 Bush 30mm Bore 8mm Keyway $49.50 2517 Bush 24mm Bore 8mm Keyway $49.50 Optibelt Omega HP 720-8M-30 $86.90 Tensioner Arm ONLY $130.90 HTD Timing Pulley 64-8M-50 $251.90