Hello,
In my search to join the NSR "club", I saw this bike:

https://motoconcess.com/fiches/index/1968032-occasion-honda-nsr-250-r2

I already saw that the exhaust pipe are not standard.
I am ready to work on the engine, but I do not wish to buy something not worth it.
It is sure difficult to give an advice only with some pictures, but I would gladly use some from someone more experienced than me.
Sincerely
Pierre

Admin edit: Shortened link for clarity.