Lehman Bandit parking brake
[QUOTE=Lee H. Mann;689831]Another thought comes to mind, the original owner could have ridden the trike with the emergency or parking brake lever partially applied causing the shoes to wear prematurely too.:Shrug:[/QUOTE]
I'm not sure how close your conversion is to the Bandit that I used to have. But when I bought it, as a basket case that hadn't run in seven years, the parking brake didn't work at all. Being an old school shadetree mechanic, I had an old brake 'spoon' that is used for adjusting drum brakes. I think they are still available at some auto part stores.
My rear brakes were so badly out of adjustment that I was amazed that they even engaged.