I had to do so much research on this topic that I decided it would be a great idea to document my findings. I’ve been relying on my trusted Motion Pro PBR tools for almost a decade now and never thought I’d have to use anything else until I decided to do the 415 chain conversion on my Yamaha R3.   Before I start explaining why the Motion Pro PBR tool wasn’t working, let’s have a quick look at the anatomy of a chain.  No need to memorize all the elements depicted in that picture. The two key measurement units for a chain will be the Pitch and the Width. The Pitch is the distance between the center points of two pins in a link. The Width is the distance between two parallel inner plates.   My…