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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.
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  #1  
Old 30 Sep 2009
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URGENT - Bad Noise - XTZ660 (~YF3)

Hiya All

I really hope you can help me out here, I went looking at a bike yesterday and it is mint... except the engine.... I remember my old 1997 XTZ660 and it didnt sound like this...

The bike is a 1997 XTZ660

The problem; when on tick over, about 1600 RPM and whener the revs are below about 4500 RPM; there is a really bad clanking sound in the engine, I can pin-point it to the lower part of the engine case but could not tell which side. Certainly more towards the front....

What can it be...

I am considering taking the bike to Yamaha to get a quote for the job being done properly, the seller is ok with this... but I really need to have an idea before I go there...

I do have a video clip with sound if I can figure out how to post it..

Suggestions please..

Thank you.

Tony.
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  #2  
Old 30 Sep 2009
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Suggest giving it a wide berth - why buy a dodgy 10 year old bike??
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Old 1 Oct 2009
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Doesn't sound good, but if its the right price may be overcome.

There is a thread somewhere on here regarding a similar noise at low revs caused by the main crank nut working loose, if you do a search the symptons should be desribed, and its an easy fix
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Old 1 Oct 2009
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If you can buy at a price that allows a full engine strip-down and rebuild, and you are willing to do the work, then go for it. Assume the worst, buy accordingly, and be pleasantly surprised if it's only a loose bolt.

I think a trip to a Yamaha dealer for a professional opinion would be a good idea, though. It gives you some idea of how much you are in for, and the estimate would be a great bargaining chip. Noises are notoriously hard to diagnose over the web.
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Old 2 Oct 2009
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Thanks folks..
I am looking at a couple of others of similar age to compare against, as you say.. I can do all the work myself as long as I can get a good torque wrench and a full gasket set... But do I want to... dont know yet...
Yamaha might be a better idea... short term solution with guarantee of workmanship (you would hope)...
Either way, I´ll see after the weekend, thanks again,
Tony.
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