Potentially taking a 2010 RC8 with 5,400 miles in on a trade. Bike starts up but has a significant knock. Some people are saying cam chain tensioner or valve need shimmed severely. I’m worried of a full motor rebuild. Also curious on a ballpark estimate of what a full motor rebuild would be for the lc8. I can’t upload a video here but if someone wants to listen and help me out and I can share the video on facebook.