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The TTR250 FAQ web pages -> TTR250 -> Repair and maintenance "stickies" -> Timing chain (or cam chain or camchain) replacement
Post Info TOPIC: Timing chain (or cam chain or camchain) replacement
TTRfan


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Timing chain (or cam chain or camchain) replacement
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I fitted a new timing chain this afternoon and have created a new picture guide.

See http://ttr250.com/Timing_chain/TTR250_timing_chain_fitting.htm 

Any corrections or suggestions for improvement appreciated!

Brian



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TTRfan


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RE: Timing chain replacement
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I have just updated the guide. 

I am always happy to receive feedback for any corrections or improvements!

Brian



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TTRfan


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RE: Timing chain (or cam chain or camchain) replacement
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I was helping a mate sort out noisy camchain-type noise this morning and was a bit taken aback by the position of his cam sprockets confuse

CS cam sprockets 1.jpg

CS cam sprockets 2.jpg

Normally, a worn camchain is indicated by the sprocket timing lines canting the other way.

I cannot explain this except to think that the camchain is very worn and is actually a tooth out no  Anyone else have a possible different explanation?

A new camchain is on its way to my mate from Steve at Totally TTRs so will be able to compare old with new very soon wink

I confess to having had to look at my own guide to removing the camchain to check what had to be removed biggrinbiggrin 

Brian



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dlee22


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Just thinking out loud here but could the cam chain tensioner be weak?

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Thanks

Daniel Lee
TTRfan


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That was one of my first thoughts Daniel but I checked it and its got a strong spring and is working well. Both chain slippers are in excellent condition.



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mossproof


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Not got 2 head gaskets on by mistake? biggrinconfuse



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TTRfan


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Now, there's a thought! That certainly would explain it....

Comparing the new and old chains there is apparently quite a difference so maybe we just go with the new chain and see what's what wink



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TTRfan


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New chain fitted - sprockets line up nicely - horrible noise gone - job jobbed biggrin

CS cam sprockets with new camchain fitted.jpg



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