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mangled swingarm/chain adjuster - fix?

Started by Privateer, December 28, 2018, 03:49:23 PM

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Privateer

#15
December 31, 2018, 05:49:59 PM
Quote from: ducpainter on December 31, 2018, 03:43:09 PM
You need to be a bit higher... http://www.ducatimonsterforum.org/index.php?topic=50011.msg915911#msg915911

Quote from: Ddan on May 06, 2008, 01:46:27 PM
Some torque values, taken from the Haynes 2valve, '91 to '96, and LT Snyders, Vol. 1

Rear axle nut                                70-76 Nm

Rear wheel axle nut                        69-74 Nm


not sure which of those numbers is right, but  I double checked my LT Snyder book and it says 70 nm/51.6 ftlbs.

are these not right? 

I can fix it of course, but I want to make sure I'm using the right resource.
My fast lap is your sighting lap.

ducpainter

#16
December 31, 2018, 05:59:47 PM
Isn't your bike newer?

I believe it uses a different size axle than the bikes the Haynes and LT's numbers are referencing, and requires more.

howie is pretty good with his info. Maybe Nick can confirm.
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Privateer

#17
December 31, 2018, 06:10:13 PM
My fast lap is your sighting lap.

ducpainter

#18
December 31, 2018, 06:33:56 PM Last Edit: January 01, 2019, 03:14:08 AM by ducpainter
I'm pretty sure it uses a larger rear axle.

Your bike's frame is for all intents and purposes the same as a 695.

Here's a scan of a shop manual...

It says 83 lbs/ftNm.

I'm assuming your bike has a 25mm rear axle.
"Once you accept that a child on the autistic spectrum experiences the world in
 a completely different way than you, you will be open to understand how that
 perspective
    is even more amazing than yours."
    To realize the value of nine  months:
    Ask a mother who gave birth to a stillborn.
"Don't piss off old people The older we get, the less 'Life in Prison' is a deterrent."


Howie

#19
December 31, 2018, 08:21:49 PM
Yep, 83Nm. 

Speeddog

#20
January 01, 2019, 07:48:33 AM
I've seen when the axle's ~loose, it can load up that tensioner bolt and break it.
In that case, the cap escapes completely.
And it's then even more obvious as the axle is unrestrained and slips position.

If the tensioner bolt isn't *quite* tight enough, it loosens due to the rather aggressive vibration, and then the cap self-employs, like this case.

Yes, 25mm axle is 83 N-m (63 ft-lb)
Tensioner bolts (chain adjuster screw) 8 N-m (6 ft-lb)

There's a small bolt that goes in the inner end of the tensioner bolt, keeps it from unscrewing completely from the axle slider block.
That bolt head has broken off, so it may be still sitting inside there.
Best to retrieve it so it doesn't jam the slider block at a later date.


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Privateer

#21
January 01, 2019, 04:45:42 PM
thank you all.  updated my Desmo Times shop book.
My fast lap is your sighting lap.

Qomomoko

#22
January 08, 2019, 12:35:06 AM
Interesting and unfortunate story.
I was under the impression that chain "adjuster screws" were more stable/solid.
I better go play with mine and make sure all the parts are SAT, especially the retaining screw for the sliding shoe.
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