throttle hand grip problem

[envdevo9]

Hi, I have a 150cc taotao bws. It has about 200 miles. I'm having a problem with the throttle grip handle. Not the actual throttle cable. The handle moves left to right with a lot of play. It works when I twist it with my wrest, but it also twists forwards and back wards, it's just supposed to twist backs wards when I give it gas, but also twist forwards. Hard to explain.