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Yamaha: Boosted Sleds (Turbo or Supercharged) Turbo discussion for Yamaha aftermarket Turbo or Super Charged sleds.
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Old 11-17-2010, 12:16 AM
Artic Cat Artic Cat is offline
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Default Nitro Chain Case bottom Gear bolt broke! Why?

I have insured chain is in alignment however I keep breaking bolts as you can see from the attached photos, 4 bolts and generally in the same location on the bolt. I have tryed grade 8 and the yamaha bolts. It's boosted however I hear is also happens to stock Nitro's. Good thing for the bolt catch on the cover!!
Anyone know why this is happening.
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Old 11-17-2010, 12:42 AM
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Default

It pretty much happens to all of them. But I used a grade 8 and shortened it a bit. This was the 3rd time ive opened the case with the bolt not being broken.
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Old 11-17-2010, 12:46 AM
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Ya I've also tryed shorting the bolt with no luck. I believe the shaft is flexing as the bolt breaks at the end of the drive shaft.
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Old 11-17-2010, 01:06 AM
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http://www.snowestonline.com/forum/s...d.php?t=197969
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Old 11-17-2010, 10:56 AM
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Are the 10's up having the same issue? Or was the change good enough to correct the bolt from breaking?
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Old 11-17-2010, 11:11 AM
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I was at a sevice Tech update for snowmobiles yesterday. Yamaha said that fixed the problem. First the bolt was to long and it would bottom out and rattle and break. then it was shortened up and that didn't work and now they said they got it right this time. Yamaha said the part number for the bolt is the new correct one.
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Old 11-17-2010, 03:46 PM
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So mr. fxnytrortx3 Is my 2010 mtx have the new bolts or are mine going to break while ontop of the Grand Mesa???
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Old 11-17-2010, 05:01 PM
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Default ???

WHEN THE BOLT BREAKS, IT WONT LEAVE YOU STRANDED (YOU WONT EVEN KNOW ITS BROKE TILL YOU PULL THE COVER)
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Old 11-17-2010, 06:34 PM
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Default Broken bolt

Pulled my 08 nytro case apart and of course had the broken bolt, after pulling the old bolt out went to yamaha and they gave me the "new" updated for the 3rd time bolt. We'll see how it holds up this season and will let you know. BTW like others have said, it made no difference in ride with the broken bolt.
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Old 11-18-2010, 12:41 AM
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Old 11-18-2010, 12:52 AM
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Old 11-18-2010, 04:15 AM
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Old 11-18-2010, 02:44 PM
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