Yamaha 1300 Tourer - Yamaha 1300 Tourer Fansite

I've been meaning to ask you guys this question for a while now but I keep forgetting. Anyway, ever since my bike was new, the stock exhaust would make this weird buzz at the end of any throttle blip or gear change. Almost as if some heat shield is vibrating. I ignored it since I knew I would be replacing the stocker soon.

Now I bought the Cobra Slip On and I was surprised to hear the buzz is still there. I've gone over the entire exhaust and everything is tight. I had a mechanic look at it and he says it's just the baffles as it seems to be coming from within the muffler. But when I watch the video on the Cobra website, I don't hear that bike making the noise.

Has anyone else noticed this?