apparently my chain tension adjuster came loose and mangled the swingarm.
(https://i.imgur.com/BRKyW5P.jpg)
I've ordered new bolts, but any suggestions on how to bend the box section back?
Steel, or aluminum?
Careful tapping with a hammer.
It's likely never going to be perfect, but IMO isn't very structural back there.
Of bigger concern is the root cause. I think you should check torque on the axle nuts.
And I think you are missing the piece that keeps that bolt in the sliding piece.
Modest sized adjustable wrench works well.
Quote from: Speeddog on December 28, 2018, 05:18:48 PM
Modest sized adjustable wrench works well.
clamp on and bend?
Yes. Same caveat as above, and don't try to fix it all at once.
Quote from: Speeddog on December 28, 2018, 05:18:48 PM
Modest sized adjustable wrench works well.
spot on, as always. sometimes had to use two wrenches to hold one section while bending another.
(https://i.imgur.com/SMfj3YY.jpg)
[thumbsup]
Well done!
at this point I'm wondering when it happened and how long I rode on it like that.
Were wheel nuts torqued properly?
Quote from: Privateer on December 30, 2018, 11:24:12 AM
at this point I'm wondering when it happened and how long I rode on it like that.
Not long at all.
Usually because after a wheel R&R the adjusters were not tightened enough. Or the axle not sufficiently torqued, as greenmonster said. I your case? :-\ Since there appears to be no damage in the sprocket area I have no idea why things got so mangled.
Quote from: Privateer on December 31, 2018, 02:20:21 PM
52 ft lbs
You need to be a bit higher... http://www.ducatimonsterforum.org/index.php?topic=50011.msg915911#msg915911
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.
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.
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... http://kuixihe.com/Downloads/How%20to%20repair%20and%20maintain%20Ducati%20695.pdf
It says 83 lbs/ftNm.
I'm assuming your bike has a 25mm rear axle.
Yep, 83Nm.
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.
thank you all. updated my Desmo Times shop book.
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.