Mbk Nitro transmission oil

Hi, what is the right transmission oil for a MBK Nitro? ( motor oil, or a specific transmission oil, 10w-30 or 80w-90..)

 

80weight I think. But I can't remember....

It's better to have the wrong oil than no oil....

 

There is still oil, but since it's used I don't know if the first owner changed it!

 

I'm really racking my brain trying to remember now... I should know this, I worked for yamaha... Urghhhh

 

Gear oil:
110 ML 10W-30

 

There we go...
10 weight

 

I read here "https://www.manualslib.com/manual/597214/Yamaha-Aerox-Yq50.html?page=61#manual " that Nitro's oil is SAE10w30 SE motor oil! and I'm confused about it, I mean what does "SE" means and why should I use motor oil for transmission?!

 

Se is just the classification. Like most oils meet that.

 

Ok, thanks