In March i broke the stock belt on my sportsman 850. I replaced with a gates belt. After about 400 miles i started to get a chattering noise from the belt area. I replaced with a polaris belt. No changed. still clunks. It would happens when there is a load like join up hill. Doesnt matter if its in 2wd, 4wd, high or low range. Taking back to the dealer ( extender warranty). Just wondering if anyone has some input.

Thanks