Holy F$&@; - MVAgusta.net
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post #1 of 36 (permalink) Old 08-18-2013, 12:55 AM Thread Starter
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Holy F$&@;

Riding down the princes hwy just now. The rear sprocket and carrier decided to shear off while on the freeway. I saw the nut fly off in my mirror i was wondering what it was until i lost all power to rear. Then i saw what was left. Just the rear sprocket on the chain. Im one lucky guy i had been flying up in maquarie pass just earlier. Somebody above is looking after me. Name:  ImageUploadedByMotorcycle1376805260.221768.jpg
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post #2 of 36 (permalink) Old 08-18-2013, 01:00 AM
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Oh shit Sam, lucky to get away with that without going down.
I don't want to know who worked on that last..................

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post #3 of 36 (permalink) Old 08-18-2013, 01:01 AM
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Crap!! Bit of luck there I suppose. No additional damage from the chain flying around? Glad it didn't take you off.
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post #4 of 36 (permalink) Old 08-18-2013, 01:02 AM Thread Starter
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Its really weird dons. Ive done a good 2000km since last service. The only thing i did was tighten the chain two weeks ago......


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post #5 of 36 (permalink) Old 08-18-2013, 01:05 AM Thread Starter
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Originally Posted by Pfatty View Post
Crap!! Bit of luck there I suppose. No additional damage from the chain flying around? Glad it didn't take you off.
Chain stayed intact. Otherwise id be looking for my leg somewhere in the kerb


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post #6 of 36 (permalink) Old 08-18-2013, 01:56 AM
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Very lucky both wrt damage to bike and to self (not going down). You would have to say either the split pin wasn't replaced or the split pin broke. Replaced is obvious and broke could be to a loose rear nut. Was the nut torqued?

One thing I have never noticed before is the CRC on the hub. Just love where the CRC and the MV cog logo appear on the older F4s. Perhaps a thread should be started as to where CRC, F4 and the MV cog logo are on the bike as I have found quite a few tucked away in places you have trouble even seeing.
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post #7 of 36 (permalink) Old 08-18-2013, 02:01 AM
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Wow,you are lucky.Was the lock clip in position on the nut ?The nut should not come loose.I always use lock wire on the ears of the clip so it secures it,double security I suppose.


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post #8 of 36 (permalink) Old 08-18-2013, 02:15 AM Thread Starter
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I dont know boys. I think the pins given way then the rear nut has come off then sprocket sheared away off the carrier. Im very lucky. Do you think any danage to the hub has been made?


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post #9 of 36 (permalink) Old 08-18-2013, 02:28 AM
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I would definatly pull out the hub,check it thoroughly and service.Make sure there is no play or wear at the hub.


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post #10 of 36 (permalink) Old 08-18-2013, 03:27 AM
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Pleased you are ok ...

I've learned in my time on the forum to go steady when coming to theories about what caused what and we do seem to get issues with the rear axle cropping up.

So, I am only asking a question. The washer which is on the axle looks to be a smaller diameter than it should be. I understand the washer should be 76 mm diameter and 2mm thick. It needs to be 76mm so that the carrier is stopped from sliding into the hub face . There seem to be witness marks on the carrier and on the hub face which " suggest" the carrier may have contacted the hub ?

Main thing is you are ok,

joe
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