I spotted this on YouTube. The modification of this RX-Z really amazes me because it have rear disc brake, but not an ordinary disc brake, this one is installed on the left side of the bike where sprocket and drive chain is also installed!
Wow, I was just thinking to change my RX-Z rear disc brake using 125Z brake, but then, it can be installed on the right side like original brake placement for 125Z.
So, how can this be possible to install rear disc brake on the left side of the RX-Z?
Tell me us how in the comments box.
For the original content of the video, click here.
UPDATE: Rear disc brake modification for Honda EX5. Maybe you can use the idea from here and transferred it to your RX-Z project.