Help identifying KLE500 swingarm
 

The problem: Basically, I have this KLE500 and I want to rebuild it as a supermoto, doing a bit of research I found a video of a KLE500 that's been converted into a supermoto with a fatter rear tyre, but I can't find any details of what swingarm they used - and the person who made it doesn't speak english, so I was wondering if anyone here recognised what motorbike the rear tyre/swingarm combo used here is off...?

Kawasaki KLE 500 Supermoto Laser Pro Soundcheck - YouTube