I know this is going to upset a lot of people here but motor cycles are the worst things ever invented.
I have lost a few number of dear friends who have died because the vehicle they were driving didn't provide the impact protection needed.
I was driving my car today and was held up behind a twat on a motor cycle who couldn't move over a metre to allow other vehicles to pass. Someone overtook me on a motor bike and then hit the idiotic motor bike rider and there was blood and guts everywhere. People believe that motor cycles help traffic flow and in my mind that is complete bollocks. They are also pollution monsters and better burned.
Not to mention the fact that most Thais overtake on the left basically because they can fit their bikes there and when you hit them during their illegal and dangerous action the BIB want to blame you.
I have picked up friends from motor cycle accidents, visited friends in hospital because of motor cycle accidents, been to many funerals because of motor cycle accidents and am sure I will continue to experience these very disturbing events whilst people dive these two wheeled death machines.
Ban the things but off-road sales should be OK because they are great off-road machines.