1978 Honda CB125S5 Oil Drain Plugs

The specified feature is steel-debris capture. Choose it for that purpose after matching the thread; the magnetic feature alone gives no reason to alter the oil-service schedule in your motorcycle’s service manual.

Only if the replacement engine uses the required fitting. Check its identity and drain thread against the 12 mm diameter, 1.5 mm pitch and 92800-12000 reference before placing the order.

The supplied contents do not specify a washer. Check that before ordering the sealing parts for your oil change, and use the installed fitting rather than another model’s washer dimensions as your guide.