Steering fluid leak.
probably going to lose your steering
can be a lose ground wire or lose coil pack or fuel rail
A dodge pickup 1500 would stall out while driving because of a defective air filter.
lose bolt no seriously its probly your alinement is off
Sounds like a fuel pump.
Vapor lock!
what would cause a 150cc scooter to lose power?
Yes.
It could be the spark plug wires that's what was wrong with mine.
Change the fuel filter first.
It could be your connection to your battery. If its bumped loose, you would lose all power, even while driving.
It's called hydroplaning. Basically your tires lose contact with the road, causing an inability to steer.