A QUESTION OF BIKES

Hello again and I hope you're fine. Now since you know about toys so much so, this question is about them since I consider myself as a toy collector. 

So I was wondering if you got an idea about those bikes from the side of the Motor Max brand. 

They are from the medium sized toys unlike Hot Wheels and Majorette (good enough for an action figure like G. I. Joe) so, any idea about the exact "side name " for them? 

They said they are Yamaha, but I still need the information about the exact type from their side names please. 

Thanks for your cooperation.

Wael.

Wotan wades in - Ive adjusted the top two pics, as it was clearly a bit foggy when they were taken..