I recently bought a used pitbull trs on craigslist. The previous owner didn't know much about it. Two of the "U" shaped frames were included for some reason but only one floor plate, one set of latches, and the mounting hardware. Both frames have pins but I don't know which bike they're designed for. One set is stamped "KR" and "ZR." The other is stamped "KL" and "ZL." I have a feeling they're for Kawis but I can't find anything on pitbull's website. If anyone can enlighten me, I'd appreciate it. I'd like to post them for sale if they're not for the bikes I own.
I don't think there is anything on Pitbulls website for the specific pin markings. I just called them and they told me what the pins were for. It took two minutes.
I should have worded my response better. I meant I have called them in the past to find out what pins were for what bike.