Aoa,
It's been several years and I'm still receiving emails from people requesting the YB100's user manual so I finally decided to upload it on Archive.org, it's rightful place. Here's the link:
https://archive.org/details/yb-100
My previous uploading 'technique' on MediaFire, though well-robust (it's still available there as well), was apparently causing confusion among smartphone users and people who aren't so tech savvy.
Just click on the link and then click on the PDF button and the file should start downloading as PDF:
Hopefully, Haynes will refrain from flagging this archive as the bike is super old at this stage + I doubt they're still printing its user manual so it's not like they can make some money or anything.