Scrambler 1000 Chatter Noise

I have a 15′ Scrambler 1000 with 200 miles on it. It makes a fast clicking noise in the rear on a slow acceleration and deceleration. It only dose it for about 1 sec and stops. It does not do it any other time. It has done it since it was new. I have had it at the dealer for a total of 4 weeks and they can’t find where it is coming from. They tell me that Polaris will not send any parts to try to alleviate the noise. It has had a new rear wheel bearing and half shaft installed on the left side. Any suggestions?

Thanks for your help!