I will try to make this brief but with as much information as possible.. I have a K7 Vee that has me baffled.. I did a valve adjust and tb sync not long ago and really took my time to make sure it was done right and was very meticulous.. The bike has been running as smooth and strong as it ever has.. Well on the way to work a couple weeks ago I started hearing something not right and a ticking noise. I got her home grabbed the stethoscope and fired her up.. I could hear the noise coming from the rear cylinder. I hurried and pulled it apart and to my surprise the outer spring loaded gear on the intake camshaft was missing some teeth. The inner gear looks fine and the lower drive gear looks fine as well. I have already purchased another low mile engine and have it installed but am waiting on a gasket because the clutch cover was scratched up so I swapped my clean one over.. Other than that its ready to go.. Anyhow back to the subject, has anyone run into an issue like this before? The failed engine had 37000 miles on it.. Valves have been checked twice and had all eight had to be adjusted the last check. What has been eating at me is did I miss something.. Its just strange that it has been running so well then this happens. If it was a timing issue and valves were hitting the piston wouldn't have sheered teeth on both intake sprockets and not just the outer one? Below are some photos.. My other question is do I rebuild this engine? Am I going to have fits finding all the teeth without a complete tear down? and what should I do for cams? Will SV or TL cams fit right in without any problems or should I stick with DL cams? Any recommendations? Should I just part it out? Just for clarification the cam was not dropped during the process..