
Thanks for posting. Just read the book for the bike, 10-40 oil, no mention of synthetic.
I googled some, and its just another never ending oil debate, with lots in my area using
Motul 10-40 full synthetic and others using Castrol power 1 of same viscosity.
The oil has to do the gearbox too, no separate oils there.
They don't mention synthetic in most owners manuals, only high performance stuff will call it out specifically. Doesn't mean you can't use it. Just pick whatever oil synthetic brand you prefer, make sure it's wet clutch compatible, fill her up and ride. It'll be fine. Make sure you change the oil filter also.
Just have fun, that's the important part.