Did two of these one year. Both gas powered with no seats. I bought them used from craigslist. Spent days in the garage fixing them up and repairing stuff. Bought large tires, etc. Spent a few more days applying fake fur and LED lights. Mounted a fire extinguisher to one and a basket to the other. They looked awesome... but yep totally noisy. They rocked running around the neighborhood streets.
On playa they became a weak ass form of transportation with a bunch of maintenance hassles.The Bad:
Mixing 2 stroke fuel suckedThe good:
Chains gunked up with dust quickly which tightened them to the point of binding. Had to readjust frequently
Had to clean the chains after every ride
Had to clean the air filters frequently
They simply would not handle deep soft spots. Had to get off and push despite having engines on the large size
Two days in something shorted and fried the electrical components in my scooter, no more LEDs or electric start
I carried several tools with me just in case of breakdown or other issues. Also carried spare fuel and chain cleaner in the basket.
main point is they they needed a checkup after every ride
They folded up and gate didn't give them a second glance despite being in plain view
because they were very well mutated people generally didn't react negatively.
I'm not sure where people get the idea that they cannot go below a certain speed. If you have decent balance you can stand still on a scooter and not fall over while holding the handle bars. This was not an issue for us. We could crawl along very slowly.
One day we did practically circumnavigate the entire city. We rode for miles and saw stuff in the far reaches of the city. We never would have done this on foot or on bikes.
Best advice I can give is to use a dry chain lube and make sure you know how to fix things when they break.
They only went once and have been rusting to shit ever since. We just want to be rid of them now. This year I found a tandem recumbent tricycle and added on an electric motor and batteries. Much quieter, nice for two people, and can be pedaled as desired.
Hope this helps someone looking for information along these lines.