Help!!! My son has a Honda SFX50 scooter

My 16year old son has a Honda SFX50 Scooter, it works, it gets him about and it keeps him happy but one of the fork seals has gone, so I ordered some new ones, no worries. I then tried to find out how much fork oil I need, can I find that info, can I heck as like, I have spent all morning searching the internet, I have found out that I should use 10w but thats about it so far. So as a last resort I thought I would ask the collective. I have got the owners manual which tells me about every other liquid in the bike apart from the fork oil, typical.

The Honda Owners Club has a facebook page Andrew so why not ask there mate?

Worth a shot, thanks, going to have a look now.