I have a 2006 VFR with 8,800 miles on it. Today while riding home stopped at a light the engine began to run rough and the idle dropped below 1000 rpm. It stayed on but was low on power. I rode it home and could rev up to 4000 rpm but it felt like it was misfiring. There was no backfire. When I got home and put the bike on the side stand the idle suddenly smoothed out and I could rev it without issues but once I got on and straightened it out off the stand in a few seconds the bad idle from earlier began. This repeats consistently. I noticed that from one exhaust muffler (I have Leo Vince) the exhaust is cooler than the other but cannot say if this is different than usual since I have never compared the two before. Last year near the end of the summer the bike suddenly would not turn over. This was remedied with new plugs but it has only been about 1,000 miles or less that I have put on these plugs. Any ideas?