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Old January 22nd, 2017, 07:25 AM   #41
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Originally Posted by toeslider View Post
Sorry, excuse the brag, but the 939 and I got stuck in mad summer beach road traffic yesterday (it's summer down here and the surf was pumping), and the engine temp went up to 107 degrees and the fan was working overtime. Yet the clutch performed beautifully as I trickled the bike along at walking pace for more than 15 minutes through a coastal town. If I had an 821, I'd be stumping up the bucks for a 939 clutch...
I've ridden my 821 19K fantastic miles. The issues I've had recently seem to have been cured by starting in neutral, careful adjustment of the cable at both points to bring the upper adjuster within spec, and a chain adjustment.

The last point is a hoisting by my own petard - the bike is sensitive to chain adjust and can get snatchy. I think I was conflating this with clutch grab and/or the 2 worked together to make things a little jumpy.

As to the neutral start - these modern machines are so good we sometimes forget that underneath the sophistication is still a "machine".

That said - when clutch pack replacement comes due, I'll shoot for the 2015 pack - but no rush and it's about 50 degrees F in New England today so it's ride time. Go figure.
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Old January 22nd, 2017, 08:14 AM   #42
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I agree about the chain snatch. The settings in the manual seem a bit loose when I check by weighting the rear. It makes sense that it worsens the 'grab'. But I have had no such problem on any other bike, so the new pack will go in at my 9K service.

It's possible that the dampers in the rear hub are a bit hammered out, too. But at <9k? They don't look very easy to change, either. When I rebuilt my friend's HawkGT new rubbers made a huge difference, but it had 50k on it!
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Old January 23rd, 2017, 04:13 AM   #43
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Quote:
Originally Posted by zippy49 View Post
I agree about the chain snatch. The settings in the manual seem a bit loose when I check by weighting the rear. It makes sense that it worsens the 'grab'. But I have had no such problem on any other bike, so the new pack will go in at my 9K service.

It's possible that the dampers in the rear hub are a bit hammered out, too. But at <9k? They don't look very easy to change, either. When I rebuilt my friend's HawkGT new rubbers made a huge difference, but it had 50k on it!
They're actually quite easy to replace. I had mine out when swapping sprockets at 15k miles. With how mine looked though, it seemed unlikely that they would have problems at 9k miles.
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Old January 25th, 2017, 10:11 AM   #44
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Light at the end of the tunnel?

As I posted in another thread, the anti-judder spring and matching friction plate are the same as on a dry clutch Hyper. Barnett has agreed to send me a set. Once it's installed I'll report on how it works, but it sounds like we have a reasonable solution.
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Old February 22nd, 2017, 10:18 PM   #45
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Oil

I was chatting to a tech about the temperamental clutch when in my local Ducati stealership to get some oil and a filter. He said try this...



Seems to work a treat. I now have a 'normal' clutch on my Hyper. Fantastic
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Old February 23rd, 2017, 06:26 AM   #46
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Web has lots of positive reviews for this product, notably "smoother shifts" and "quieter engine". However, this thread with oil analysis is concerning: Motul 5100 review
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Old February 23rd, 2017, 05:22 PM   #47
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Re-post of clutch pack holding tool
See if this works for you
https://goo.gl/photos/JjNSbSPYztTvvhsk9

Last edited by fredgilb; February 23rd, 2017 at 05:45 PM.
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Old May 7th, 2017, 11:10 AM   #48
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See here for clutch swap guide/impressions:

Ducati Hypermotard 821 clutch fix - the definitive guide
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