Timing cahin slack ?

When is it time to change timing chain ?

I have a WR400 -99 and I have some bad sounds from the engine. I think it is timing chain that is slack. My tensioner is out 6 mm (1/4 inch)from full out !! Is that normal ?

I will try to rebuild the tensioner today so it will be longer, and check if the sound will be less.

Anyone had this problem ?

/ Johan from Sweden

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