That was me... well, it was my father-in-law when it was his and he "scrambler-ized" it. He ran the aforementioned Kenda 270s. The rear was too wide and chewed up the rear fender. I personally didn't like them too much... very unstable feeling... so when the rear was worn out, I went back to street tires.
But here is a pic or two with the Kendas:

Rear fender damage:
