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.

 

[vanness]

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

Can you suggest or link a post on how to go about diagnosing it? I saw a reddit post that have exactly the same issue as mine but I can’t get a definitive answer : https://www.reddit.com/r/motorcycles/s/rnCS9HdlQY

 

[Gary in NJ]

If the timing chain is showing signs of wear/stretch, ie the timing makes don’t align, then you replace the chain and guide…that’s the diagnosis and solution.

 

[TownsendsFJR1300]

Plus 1 ^^^

-Start with the crank mark on TDC / block mark.

-Get the chain taught to the exhaust cam-(Both marks should line up to the block / head).

-Now, get the chain taught to the intake cam (again marks should line up).

-Take out chain slack with the CCT on the rear run...

-Done...

.

 

[vanness]

Do I have to do them as a set or I can get away with just the chain?

 

[TownsendsFJR1300]

You really have to inspect them for wear. If noticeably worn, they need replacement.

With 50,000 miles on the clock, and your replacing the chain anyways, I'd do the guides as well.
Your pretty deep into it at this point.

I wouldn't want to come back in say 10,000 miles for guide replacements.

.

 

[vanness]

You really have to inspect them for wear. If noticeably worn, they need replacement.

With 50,000 miles on the clock, and your replacing the chain anyways, I'd do the guides as well.
Your pretty deep into it at this point.

I wouldn't want to come back in say 10,000 miles for guide replacements.

.

What about the cam gears?