Acceleration noise on Piaggio Typhoon 50

[skyrider]

Hey guys, been awhile. About 2 yrs ago my Chinese 50 was stolen and for $1,200 I picked up a 2014 Piaggio just under 1,000 miles. I've always heard a rattlin sound which I thought was valves, but now its gotten much louder on acceleration only. It now sounds like rollers, but the sound comes from the exhaust side. Exhaust is tight, no holes, but I have some fear that something might happen that could be prevented. Just under 2,000 miles now and I did change the oil, but that didn't help. Other Typhoon owners on the web have reported a similar noise. Thoughts??