Hi All. I was on the interstate last week and downshifted to switch lanes and the bike suddenly loss power and makes a loud rattling noise from the right side of the engine. I got it home limping it in one cylinder and the exhaust pressure is significantly lower on the front cylinder (put my hand behind each exhaust and lower pipe has less pressure). I can't see anything obvious and it sounds like the noise is internal. It doesn't make the noise while cranking only when running. Any ideas? Are these two separate issues or did I maybe lose a cylinder due to spark plugs or no gas and it's causing the rattle? Don't think it's a rod or anything as it seems to high pitched for rod knock and again it only does it when running. What do you guys think?