acceleration

Hi everyone, so about two weeks ago, I started having issues with my 2007 Vulcan 500. When I give it throttle, it revs up but has a delay in acceleration, and when it DOES accelerate, it's as if it has half the power it should. At higher speeds it handles a little better but it's still sluggish...

The bike has about 3500 miles on it I bought it with about 1200 miles and the issue started around 2000 miles. In any gear if I get over half throttle it bogs down hard to where it's not strong acceleration and its gradually gotten worse to the point where I can't even get the bike over 30mph...