2005 Honda Rincon has a grinding noise from engine.

I have a 2005 Honda Rincon i just bought a month ago it had 176 miles on it then and now it has 300 miles on it. I can hear a light strange noise some at idle that comes and goes off and on but is more noticeable with giving a little throttle to it and its not the usual sewing machine sound and knock that all these machines do It sounds like it is coming from the front of the engine around where the exhaust curves up the engine. Its hard to describe the sound it about sounds kinda like light grinding or like bad electrical connection. Here is a clip of it I took and it is kinda hard to hear the light noise over the normal rattling knocking sound of the engine. I have heard a lot about cam chain or tentioner problems on these. I was just wondering if this sounds like a cam chain problem or what else. I can only hear the noise when the engine gets good and hot. THANKS!!!

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