Does anyone know what screw head type or tool type you need to remove the drain and fill screws for the front and rear diff fluid? Also is Maxima Gear Oil 80w90 acceptable for the diffs?

[2015 Z Force 800 53/Trail EPS]

Does anyone know what screw head type or tool type you need to remove the drain and fill screws for the front and rear diff fluid? Also is Maxima Gear Oil 80w90 acceptable for the diffs?

On my 800 I believe its a 5mm hex (allen) and yes, that gear oil is fine. Don't try and use a SAE allen, you will round it out.

8mm allen hex on my 2017 Z8.  Just changed it yesterday :-)

[2015 Z Force 800 53/Trail EPS]

8mm allen hex on my 2017 Z8.  Just changed it yesterday :-)

Makes better sense. 5 seems a bit small now that I think about it.