Someone gave my Grandson a nice little quad but there's no identification on it other than a decal on the motor that says "GTO" Any idea what this machine is? It ran fine when he got it but my son unplugged the tether to make sure it worked (which it did) but now there's nothing - no lights, no power to turn the engine over etc. I do have 12 volts at the tether and tried jumpering it but we have the same results. looking for any info I can get because I'm not looking forward to taking the handle bars, rack and front fibreglass off of this machine to troubleshoot this further. Thanks.