Cam chain sprockets check

Hello,

i'm looking on my 3 cam chain sprockets.

I have one : nothing is moving inside. (back one)
I have one : the metal center pin can roll imself (top one)
I have ome : all metal parts can move themself inside (front one) -- (For this one it can be easy to remove the center pin with a finger)

Is that normal or they are worn ?

Best,
Fox

 

If anything other that their axles rotate or move independantly of the sprocket they must be replaced or repaired.

Ok so the center axle must rotate
i have one like this. : good

I have one where all parts moves : worn

what about the one wehre the center axle don't move ?

Better to replace but not important...
I mean the cam chain sprocket just turn around the idler guide...
Whatever it turn ones (just the sprocket) or twice (the sprocket and the centre axel) or 3 times (the sprocket the centre axel and the other metal part inside.)
It's just worn and i have to think to replace the last one but can be used like this for the moment... no ?

Personally, I think the risk is too high. If it fails, the result could be a destroyed engine. Since the engine is already open, now is the time to replace them all. Take a close look at the chain, too. Measure it for stretch to be sure it is not also needing to be replaced. Liska makes excellent replacement sprockets.

if you pinch the central axis between 2 fingers the sprocket only rotate or the other parts also rotate?

For sure i have to ckeck the one who don't have the centre axel rotate ...

The idler sprockets have a needle roller bearing in the middle.
Only the axles should rotate in the bearing .
The rest of the sprockets are bonded together and should behave as one piece.
If any other part or sleeve etc moves independently the idler is faulty..
 

Yes. On the 3 have one is working like that. One good.
One have a little play but it can do the trick  for the moment. I will replace it in future.
One i can remove the inside with a finger so i replace this one.

Is it possible to see if the top idler is worn or not ? I have the oem one with the pin.
Is it a way to remove this pin? Do i need to drill it ?

Also how to know if my cam chain need to be replaced ?

Fox wrote:

Yes. On the 3 have one is working like that. One good.
One have a little play but it can do the trick  for the moment. I will replace it in future.
One i can remove the inside with a finger so i replace this one.

Is it possible to see if the top idler is worn or not ? I have the oem one with the pin.
Is it a way to remove this pin? Do i need to drill it ?

Also how to know if my cam chain need to be replaced ?

 

See page 143 of the factory service manual for chain specifications.

kzrider.com/modules/ServiceManuals/Kawas...Service%20Manual.pdf