1090 rear sprocket movement - MVAgusta.net
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post #1 of 19 (permalink) Old 04-03-2011, 04:29 AM Thread Starter
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1090 rear sprocket movement

Hi guys can anyone with a 1090 check how much rotational movement they have on their rear sprocket. I've done 6000 miles and I could turn the sprocket about 4mm by hand when it wasn't under load. My dealer said the cush bushes were knackered and changed them under warranty, I had no play at all when I collected the bike from the dealer but I've covered about 300 miles since and I can now move the sprocket about 2mm. I'm guessing that there shouldn't be any movement at all.
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post #2 of 19 (permalink) Old 04-05-2011, 02:13 PM
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Just checked mine and has probably got 3mm front to back and 2mm side to side .

is this similar to others ? how about the new F4's ?

should i be concerned ?

Funnily enough my 41k mile 650 BMW doesn't seem to have any .

Steve
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post #3 of 19 (permalink) Old 04-05-2011, 02:25 PM
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Just did aseach and came up with this from 2007 :

Cush drive rubbers new supplier
Hi all,
Just a bit of useful information for future reference,
My cush drive rubbers on my EVO3 rear sprocket decided to give up and fall apart (rubber disintegrated!) only after 18 months of fitting , I paid £25+vat x 5 (£150) from MV so not very happy .
This forum put me on to the idea that ducati 916 were the same, so i bought some.
They are the same but the price is £9 each!!! and the quality is far superior to the MV ones, ducati had this breakup issue too, so i think they have put more effort into the moulding. So a saving of nearly £100 and better quality!
The Ducati part number is 70090171E.
Thought you may like to know.
Cheers
Chris



Anyone know if this would sort out a 2010 model ??
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post #4 of 19 (permalink) Old 04-05-2011, 03:04 PM
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I also noticed similar movement on my 1090 with just over 600 miles on the clock - I spoke to Forza Italia at Silverstone and they told me that it's normal - I'll keep an eye on it and if it gets worse I'll see about getting the rubbers changed under warranty
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post #5 of 19 (permalink) Old 04-06-2011, 02:23 AM Thread Starter
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Quote:
Originally Posted by steve1968 View Post
Just checked mine and has probably got 3mm front to back and 2mm side to side .

is this similar to others ? how about the new F4's ?

should i be concerned ?

Funnily enough my 41k mile 650 BMW doesn't seem to have any .

Steve
On every other bike I've owned I've never had more than a couple of mm. Mine got to 4mm and the dealer said they're fubared and changed them. I've now got 2mm after just 300 miles, back to the dealer who said he would need to check with MV in Italy to see what an acceptable tolerance is. I think this is just MV covering up for crap cush rubbers.
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post #6 of 19 (permalink) Old 04-09-2011, 01:04 AM
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Quote:
Originally Posted by flushman View Post
I've covered about 300 miles since and I can now move the sprocket about 2mm. I'm guessing that there shouldn't be any movement at all.
Mines the same after 900 miles, about 2 mm play, I can't find a service limit in the workshop manual but most bikes have zero angular movement...

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post #7 of 19 (permalink) Old 04-10-2011, 02:14 AM
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same here 1k miles on a new bike and about 2 or 3 mm maybe slightly less side to side and forward/rev when the bike is on the sidestand and moving the sprocket by hand.
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post #8 of 19 (permalink) Old 04-14-2011, 06:10 PM
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Thumbs up play?

the other day i had 3 cush drives off of bikes
16,000 mi, ~6,000 mi and unknown mileage
i put an axle vertically in the vise and lightly clamped on the drive pins that go into the wheel
measured with a dial indicator on a sprocket tooth radial play was 0.05 mm to 0.07 mm under finger pressure

the sprocket nut was not used so i didn't measure axial play


neither my 30,000 mile Aprilia nor 27,000 mile KTM have any play
either




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post #9 of 19 (permalink) Old 04-14-2011, 09:31 PM
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Same issue, Please refer to this post

http://www.mvagusta.net/forum/showthread.php?t=13150
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post #10 of 19 (permalink) Old 04-14-2011, 10:04 PM
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Post Huh ?

Are you guy's sure you are moving the actual sprocket and not the chain or something, 3-4mm, I find that hard to believe. My rubbers have done 8000km of racing and even with tiny tears in them I have no noticeable movement. I looked at the spare I bought from CAG and also no movement worth mentioning.
If you really have that much movement, then new MV owners better start speaking to the factory.

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