I have seen one thread on this but there was no answer to the question. I bought two of these quads for my sons and one of them works just fine, the other works fine also except if the loud squeling noise. I can put it in neutral and rev it up and it doesn't do it. But it does do it when it's in gear and in motion. It starts at about 5 mph and will continue to do it until it slows down to about 5 mph. Sounds like it's coming from the left side. I have seen other people say they have had this issue but had no fix for it. If anyone knows what it is please let me know??? Thanks

 

What kind of a squealing noise? Mechanical squeals or metal rubbing against metal? Rubber belt noises?

Be a bit more specific about the area as well.
Chinese ATVs tend to make a LOT of noises because well.. they're Chinese.