Cam chain - MVAgusta.net
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post #1 of 19 (permalink) Old 06-15-2013, 03:31 AM Thread Starter
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Cam chain

Found out why the bike stopped on the way home last night :



Pretty sure the tensioner was shot, it was on the list to check this weekend.
I was literally slowing down to turn into my drive when clunk and no power....

Last edited by rsawkins; 06-15-2013 at 03:34 AM.
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post #2 of 19 (permalink) Old 06-15-2013, 05:01 AM
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Damn that's not good mate. Do they damage valves when this happens?


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post #3 of 19 (permalink) Old 06-15-2013, 05:21 AM
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Unhappy Bummer... Sorry to see this has happened to your motor

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Damn that's not good mate. Do they damage valves when this happens?


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Unfortunately, in most cases yes..

Is this a 750 or 1000 model ?.. Don't purchase the replacement chain from MV as they use DID chains in their motors.. These can be bought cheaper direct from a DID supplier..


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post #4 of 19 (permalink) Old 06-15-2013, 05:41 AM
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97 000km's

That's Richard's 750 Brutale, John.

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post #5 of 19 (permalink) Old 06-15-2013, 06:18 AM
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Wow.. 97000Km's..

I think Richard got what life that chain had to offer in this case..

I know MV give a recommended Timing Chain replacement schedule, but I thing the 750's are good for 20,000+ milles over that replacement period..

However, the 1000 motor chains seem to take slighly more hammering and I know of 2 examples that needed replacement approx 10,000 miles over the scheduled period..

The tell tell sign was a rattle still present after a new cam chain tensioner kit was installed..

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post #6 of 19 (permalink) Old 06-16-2013, 12:42 AM
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Bugger,there`s a 750s for sale right now on here.
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post #7 of 19 (permalink) Old 06-16-2013, 05:37 AM Thread Starter
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This was my 2005 Brutale 750 just short of 97000km, the 910R now enters daily service Monday morning....

The chain had done about 60000km, it was changed at 36000 or there abouts. I'm pretty sure the tensioner was to blame, things have been sounding a bit more rattley for a long while, so much so I asked the mech to check the tensioner etc a while ago, he said they were all ok - I don't believe this now so next time I have a hunch it ain't right I'll be looking into it sooner.

I visited my old mech on the way home Friday to pick up an alternator and he said tensioner ( or maybe chain). The slightly annoying thing was I already had this weekend scheduled to pull the tensioner etc out and check them. Another 50metres and the engine would have been switched off in the garage instead of me having to push it up the drive.

The broken chain appears ok other than the buggered link and the one next to it that has popped off. Not sure but as it happened changing down I'm going to guess a bit too much slack somewhere and it dropped off a gear and jammed on something. If I get the time next weekend I'll drop the motor and see what the damage is, but I'll be very surprised if there aren't some new smiles in the pistons and a few bent valves.

So the most likely decision will be between parting the bike out and getting another engine as I don't see a rebuild being worthwhile if there are bent valves.

Last edited by rsawkins; 06-16-2013 at 05:39 AM.
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post #8 of 19 (permalink) Old 06-16-2013, 06:13 AM
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Sad news indeed, makes me wonder about my `05 . Reckon it`s related to the metal in your oil a little while ago?
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post #9 of 19 (permalink) Old 06-17-2013, 12:35 AM Thread Starter
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Maybe, I'd say some of the grey sludge was the engine casings being worn away by the flapping cam chain, if so I might be able to see where when I pull it apart.
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post #10 of 19 (permalink) Old 06-17-2013, 01:40 AM
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New Motor then or off to the knackery ?
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