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Timing chain

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I have the 91 dr350 dirt model... Noticed yesterday after a long day of riding that my timing chain was definitly louder then it was before. I can hear it slapping... I have no idea when and or if it's ever been replaced. I'm gonna go with never. How can I check and see how much, if any , room or clicks the tensioner has left? How do I check it out? I backed out the bolt on the head, thought it might be an inspection hole? Wasn't. Now it's even worse. Need some help!

Don't let Monday ruin your Sunday!

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The bolt I backed out appeared to be the rear guide boss bolt?

Don't let Monday ruin your Sunday!

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No one has changed their own timing chain?? Got a hold of Greg Bender, he shed some light...

Don't let Monday ruin your Sunday!

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to check wear you take off the auto tensioner and see how extended it is:

 

kdk_1147.jpg

 

 

The spring is removed first to stop it ratcheting out as its removed. To double-check, extend it fully, and see how far in the tensioner is within the engine:

 

kdk_1151.jpg

 

 

If its like this its maxed out and will need doing …

Edited by thedktor

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I removed the tensioner retaining bolt on the cylinder like a idiot! Dropped tensioner immediatly... Took off the head, fished it out and put bolt back through. I am maxed out, but the deflection is within spec... Think maybe I was hearing things that were possible valve related and perhaps a somewhat loose spring. Thanks for the help. I bought the manual;)

Don't let Monday ruin your Sunday!

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Was startin to think I was on my own here. Every other thread I read is folks trying to figure out how to start the bike!!

Don't let Monday ruin your Sunday!

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Play safe, bite the bullet and replace it. I didn't realise how loud mine was until I replaced it! Not a massive job to do, I made the mistake of starting the job without a tool to hold the clutch (I think it was that, a while ago now) so I ended up having to make one. I think that's the only special tool needed for it. Wouldn't have thought you'd hear a loose valve spring unless somethings seriously not right in the top end though, they're tight as a nuns wotsit usually.

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Done! Wasn't bad repair at all...'couple hours

Don't let Monday ruin your Sunday!

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Why is your tensioner guide slapping around? What did u see when u popped off the clutch cover? The tensioner is loose? Meaning the guide? I'm not talking about the auto ratcheting part...

Don't let Monday ruin your Sunday!

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Wow! That guide has to be cracked or not bolted up top.

Don't let Monday ruin your Sunday!

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How'd u make out??

Don't let Monday ruin your Sunday!

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