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YFZ Luke
90cc 2 stroke / 110 4 stroke
Joined: 26 Aug 2012
Posts: 86
Location: Hunter Valley NSW
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 Posted: Fri Dec 28, 2012 9:30 pm Post subject: rattle in bottom end /gear box |
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my 2008 yfz 450 has developed a rattle in the gear box area , can hear really loud when in gear and under acceleration or light throttle opening
Do these things have box problems , im yet to drain the oil and filter and check for metal , and its still slecting gears ok .
I have changed oils from motul 7100 to castrol 4t . would this have anything to do with it ?
anyone experience similar problems
cheers luke |
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BCNYA
50cc nipper
Joined: 16 Jul 2007
Posts: 27
Location: Newy
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| Posted: Wed Apr 17, 2013 8:48 pm Post subject: |
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Mine is a 2009 model doing exactly the same thing. Does anyone have any info?
_________________
NOS is like hot chicks with STDs. U know u wanna hit it but are afraid of what will happen after u do. |
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YFZ Luke
90cc 2 stroke / 110 4 stroke
Joined: 26 Aug 2012
Posts: 86
Location: Hunter Valley NSW
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| Posted: Sat Apr 27, 2013 8:05 pm Post subject: |
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ive done another 10 hrs on mine and 2 services , no metal or fibers yet , im still using the 4t oil ,, gunna ride it till it sh&ts it self
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08 YFZ450 , WR 400 |
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Restall
50cc nipper
Joined: 01 Mar 2010
Posts: 45
Location: Salt Ash
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| Posted: Sat Apr 27, 2013 9:45 pm Post subject: |
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| The yfz motor has always been a noisy motor , the timing chain gives out a rattley noise and they also tick under load but all are normal from an all aluminium engine . Not sure about the noise from the box tho , but I would go back to motul 7100 . Much better oil . |
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surfin
Roostin Away
Joined: 03 Nov 2008
Posts: 771
Location: Toowoomba QLD
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| Posted: Thu May 02, 2013 4:13 pm Post subject: |
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I have noticed if the alloy bash plate on my quad is not on properly that it can make some horrible noises that you might think come from the gearbox.
Once its all bolted on properly then no more noises
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PeteW
Moderator
Joined: 09 Feb 2006
Posts: 1877
Location: Doreen, Vic
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| Posted: Tue May 07, 2013 2:51 pm Post subject: |
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yes they are a noisey motor but an extra noise, well, start with a loose bash plate, then maybe timing chain, clutch basket, chain rollers. It really depends on the definition of the sound of the rattle. Sometimes a rattle can be as simple as a worn out chain or it can be a piston about to come apart....
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