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March 10th, 2021, 10:13 PM   #1
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cam chain rattle 70° FE450

Hi, I have FE450 2011 300+ hours on engine and my timing chain is rattling like this i guess.



I want to ask. If I will change timing chain for a new one, is it ok? Or I will need to change timing chain and timing chain tensioner?

I dont like manual cam chain tensioner. Dirt trics cant buy here.

I found this automatic mechanical and hydraulic cam chain tensioner for ktm 530. Any experience?

https://www.brumla.com/sponovak-rozv...2009-47810.htm

Last edited by Hrosiiik; March 10th, 2021 at 10:39 PM.
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March 11th, 2021, 12:09 AM   #2
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I raced and green laned a 570 for 3 years. all I did was undo the two bolts holding the CCT by 1/2 a turn and you can hear a click. even if yoiu don't hear it, just undo it a little and then tighten it and start the bike up.

I did it 3 times in three years. it worked a treat. everyone seems to shit themselves though so I am just happy that I was happy.for me!

Taffy
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March 11th, 2021, 04:36 AM   #3
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Are you trying to say. Change cam chain for new one and everything will be ok?
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March 11th, 2021, 06:16 AM   #4
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maybe your automatic tensioner cannot adjust, by undoing it a little it can 'click' one place.

that is what I am saying

Taffy
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March 11th, 2021, 01:39 PM   #5
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Originally Posted by Taffy View Post
I raced and green laned a 570 for 3 years. all I did was undo the two bolts holding the CCT by 1/2 a turn and you can hear a click. even if yoiu don't hear it, just undo it a little and then tighten it and start the bike up.

I did it 3 times in three years. it worked a treat. everyone seems to shit themselves though so I am just happy that I was happy.for me!

Taffy
70° bergs don't have that kind of tensioner. It's a hydraulic type under a single bolt cap. So you can't do that on these



Nuno
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March 11th, 2021, 05:44 PM   #6
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Take out your tensioner you’ll see it’s a ratcheting type and automatic if working right not hydraulic. Taffy is right. You can buy manual tensioner.
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March 12th, 2021, 12:11 AM   #7
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Originally Posted by webmonstro View Post
70° bergs don't have that kind of tensioner. It's a hydraulic type under a single bolt cap. So you can't do that on these

Nuno
sorry Nuno but they do. you are 100% wrong. find out how it is made first.

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March 15th, 2021, 01:56 PM   #8
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Originally Posted by Taffy View Post
sorry Nuno but they do. you are 100% wrong. find out how it is made first.



Taffy
You said to undo the two bolts. the 70 degree berg does not have two bolts holding the tensioner. only one big one holding the housing.
Also the tensioner does have a internal locking mechanism but it will compress under tension if not backed by the hydraulic pressure and when worn out.




Nuno

Last edited by webmonstro; March 15th, 2021 at 02:17 PM.
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March 15th, 2021, 02:03 PM   #9
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Originally Posted by Rainerio View Post
Take out your tensioner you’ll see it’s a ratcheting type and automatic if working right not hydraulic. Taffy is right. You can buy manual tensioner.
I have already replaced with a manual one.
The OEM one has a ratchet mechanism but is also pushed by hydraulic pressure. there is a oil gallery directed to it. As you need to compres it to set it up the rachet mechanism will collapse if you push it so letting it expand one "click" then tighing it down again will not work

The noise is from the rachet mechanism that is worn out and letting the tensinor compress and expand. So it will just do it again


Nuno

Last edited by webmonstro; March 15th, 2021 at 02:13 PM.
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March 15th, 2021, 11:15 PM   #10
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I have a 450 70* motor it’s apart so I look at where the tensioner is I see a oil passage so weres is the hydraulic pressure coming from? the motor has a oil pump taking oil to top end and gravity takes it down. So that passage is for lubrication only. If I’m wrong explain to Me how. The OEM tensioner work off of spring pressure. There’s no passage coming from the pump.

Last edited by Rainerio; March 15th, 2021 at 11:22 PM.
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