I was poking around on the internet, looking for Chinabike stuff, and I ran across this on Zongshen's web site:
Motorcycle dump trucks!
And they have a kick start!
Anyway, I thought they were dump beds, and that lever on the right side just in front of the bed controlled the dump function. But then, after thinking about it, I wonder if that's an auxiliary reverse gearbox? What do you think?