I just bought a 2022 HISUN 550 Sector last week. I bought it after reading some reviews and we are older and don’t need anything fancy. We just use it in town and on our acreage. It so far has been great. I notice when the RPM’S get up to around 3500-4000 there is a strong vibration that sounds like a heat shield. I haven’t examined it closely yet but I have checked some fasteners for looseness. Sounds to me like it’s coming from underneath the UTV. Is there anything that is common to these that I should know about? I think the skid plate is plastic. This sounds just like a heat shield loose. Any ideas ?