Question Stretched Timing Chain Or CCT Issue

[vanness]

Hello, during my valve clearance check I've noticed that I was having a hard time lining up all 3 gears, while both cam gears are lined up crank gear doesn't. Is it caused by stretched chain or the CCT gives out (or something else). Note that the bike has no rattling noise, jerky throttle response at low speed and it has 80K KM on the clock. I never work on an engine before, advices are appreciated, thank you.

 

[Gary in NJ]

It’s most likely the chain. A worn chain guide will have more impact than CCT.