If I'm looking at the pic correctly, your supposed to pour it in the little 8mm hole by removing that particular bolt in the pic...Hope you got a smaller funnel than shown in that pic to pour it through.
It also says "4 stroke" oil in the ad without specifying weight...You say 10w-40 but it could also be 0w-20, or even a straight weight oil for all you know...It also says 120ml, but you say 125ml which would be overfilling it...It also doesn't specify conventional, semi-synthetic, or full synthetic oil either...The kind of oil would be important to know as well so not to void any warranty you may have...You would also have to ask them how often does that oil need to be changed as well...also there is no way to periodically check the oil level as it dissipates over time.
I think you need to call Amazon and tell them you need exact specs on this before you ruin it.
When I read all the Amazon reviews on this, almost all of these people had bad experiences with this motor and transmission...Good luck to you on this motor and wet transmission kit.
One reviewer in particular had this to say...
Other Reviews:
View attachment 178717
If I had a friend that had this experience already, That would have been enough reason for me to avoid this kit at all costs.