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The TTR250 FAQ web pages -> TTR250 -> Repairs and maintenance -> Timing marks not lined up
Post Info TOPIC: Timing marks not lined up
Truxx


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Timing marks not lined up
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Noticed today when I had the bike at tdc the marks on the cam gear didn't line up flush with the head. 

See pic:

does this mean the cam chains stretched? 

 

Thanks

dave



-- Edited by Truxx on Monday 18th of August 2014 08:24:06 PM

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Truxx


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image.jpg

Pic attempt 3 lol



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LoopSoosStroop


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Does not look like it's out by much, but I haven't done this before. If we knew how many km's the engine has we could make a better assumption.

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LoopSoosStroop


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How much is a cam chain? Would suck to replace just for it to look the same. Which side is the tensioner, left or right?



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TTRfan


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The part number of the timing chain is 94591-43122. I can't tell you the price for you to buy locally in SA but it's £25 GBP in the UK.

The tensioner is on the left of the picture - at the rear of the engine.

Brian



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Truxx


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I've ordered the new chain so I'll just replace it regardless just incase it is that.

Looking through the how to guides it seems to be a really easy job to replace so it's probably worth doing.

Mileage on the clock says 2500 km so I'll assume that's not genuine lol

the engine runs perfect but there's a top end rattle that comes on as the revs are coming down then goes away at idle.

either way I'll post the results soon as the parts get here

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Truxx


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New chain arrived this morning (thanks Brian) took about 2 hours from start to finish, surprisingly easy job to do.
Engine now sounds like brand new all marks line up etc

We'll chuffed :)

Dave

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TTRfan


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biggrinbiggrinbiggrinbiggrin



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LoopSoosStroop


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Good news, so marks that line up/not line up might be a good indication of cam chain wear. Will check mine when I check valve clearances.

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