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The TTR250 FAQ web pages -> TTR250 -> Repairs and maintenance -> Something sounds expensive
Post Info TOPIC: Something sounds expensive
grandad


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Something sounds expensive
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I've developed a grinding rattling metallic noise fromm around the engine sprocket - gearbox aria when riding,could it be gearbox bearingss, if so does this mean a complete engine strip, rest of engine runs as sweet as a nut,HELP 



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Cubber


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If I were you, Grandad, I'd take a good look at where the noise was coming from before anything else.

I've had rope, binder wire, twigs and stuff wrapped around my gearbox sprocket that sounded like major trouble.

Easily sorted - but very disconcerting.

Martyn



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WheelMan


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I had a really bad rattle in that area and mine turned out to be as a result of the previous owner not tightening up the rear sprocket!



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ttboof


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i thoight i had the same problem but it i had done a repair on the shock flap and the edge was just catching the chain sounded terminal .

the rear engine mount can come slightly loose and make a bad noise as well 

chain slider or top roller 

gesrbox prob unlikley 

good luck 



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grandad


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I've checked all the obvious, infact my friend made me a new top roler with a bearing at each end, the noise is worst in top gear and really chatters on over run, sounds like your shaking a load of ball bearings around on an aluminium can then when you have power on it sounds like your spinning the bearings around in the can.



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ttboof


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Sounds like the chain might be touching the case saver it's a pretty common thing

Sounds bad and usually when you back off the throttle  

Just have to take the front sprocket cover off.and  file a bit off the bottom end hope this might be the culprit 

 



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