I have a 2012 Yamaha R6. I went on a cruise one day and I begun to hear a small ticking. As I continued on my ride it started to increase until I completely over powered the sound of my exhaust. I read forums and decided to replace the cam chain tensioner. It continued. I checked for loose bolts,exhaust leaks, and oil. Still continued. It’s coming from top end of the engine case. I have 20k miles on the bike. Any suggestions?