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Yamaha Tech Originally the Yamaha XT600 Tech Forum, due to demand it now includes all Yamaha's technical / mechanical / repair / preparation questions.
Photo by Andy Miller, UK, Taking a rest, Jokulsarlon, Iceland

I haven't been everywhere...
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Photo by Andy Miller, UK,
Taking a rest,
Jokulsarlon, Iceland



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  #1  
Old 15 Mar 2010
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cam chain

So I,m pulling the xt 600e apart to do the fifth gear whine....cam chain has 74 000 kms on it,do I replace it or is it still good for more? I was surprised at how good the piston and barrel looked and might just get away with a hone and a new set of rings,I ll let you know if it is in limits......
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Old 15 Mar 2010
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Looked after and serviced regularly they will go for ever (well nearly).
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Old 16 Mar 2010
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If you're in there, they're cheap enough to make it worth while.

I don't know about you're experience so I hope im not being patronising saying:

Rings and a hone are all you will need unless theres visable damage to the piston. If you remove the piston to change the rings, make sure you use a new lock ring for the gudgeon pin.

De-coking the head and with a brillo pad would be nice and maybe grinding the valves if they look pitted or badly coked.

If it were me, if probably do the valve seals too. Its a simple engine and not many valves so hardly a big deal.

Jeez, if it were mine then id probably change the crank bearing and clutch bearing but im just a fool who loves wasting money
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Old 19 Mar 2010
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Change the cam chain! Mine broke with only 30000 km and bent both exhaust valves, you don't want that or worse!


Vando
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Old 19 Mar 2010
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Risk equals probability times consequence. Low probability (probably won't break) but high consequence (i.e. top end rebuild by the roadside) equals a moderate risk and suggests you replace the chain when convenient. I did KLR chain at 50k miles.

Hope that helps.

Mark
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Old 21 Mar 2010
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I will replace my cam chain as I have found the yamaha dealer here is really well priced,I measured the piston and bore and it looks like 2 nd oversize and in really good condition so I think I will just get a hone and new rings and replace all rings and lock washers ....shame to not do it and have the engine blow for a penny washer......
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