Rear Reat popping up after each ride on the Hypermotard 698 Mono
- Thread starter dunchooby
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roadkillrob
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any details?
Braaapster
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Interesting. To me, it seems like the problem has more to do with the way the seat is supported, rather than the rubber grommets. The seat pan is flexing under the rider’s weight and the back end is pivoting up and out of the grommets.
kwwood24
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I 3D printed some new grommets and haven't had an issue since.
I posted a pic of them in another thread. I think it is a support issue and a grommet issue. The factory grommets are very flimsy and they fall apart after a bit. I made some out of TPU material which solved the issue.
I posted a pic of them in another thread. I think it is a support issue and a grommet issue. The factory grommets are very flimsy and they fall apart after a bit. I made some out of TPU material which solved the issue.
Braaapster
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Yup. I was impressed with your mod, kwwood24. Your post is in this thread, just a few back, on the bottom of page 1.
The repetitive stress/strain will continue, regardless of the grommet quality, so I wonder whether the plastic seat pan will eventually creep & relax into a final shape or if it will eventually suffer a fatigue failure.
The repetitive stress/strain will continue, regardless of the grommet quality, so I wonder whether the plastic seat pan will eventually creep & relax into a final shape or if it will eventually suffer a fatigue failure.
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I could be wrong but I think the issue is the subframe, which is essentially acting like a beam supported at one end, vibrates too much. A certain RPM is a resonant frequency for the subframe and the seat pops out. A subframe is like a cantilever beam, and resonance can be a serious issue.
Braaapster
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The tail of the seat pops up when I sit on the bike, at 0 RPM.
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Ah, good to know. Thank you. Mine only pops up after a 1minut ride.
Geordietraveller
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My dealer just informed me that there is a recall for the seat grommets and the chain guide. Waiting for parts to come in - I’ll report back once I get it done. ( Away from home right now)
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Thanks for the info!
My dealer is closed this period. I will update soon.
roadkillrob
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I just want the part number of the updated part, not worth the hassle to have them do it for me.
Braaapster
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Understandable. Unfortunately we don't yet have any clue about whether the second recall might be a different story and might make it worth the hassle.
roadkillrob
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Yes chain guard issue seems maybe more worth the drive.
Braaapster
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You never know what else they might need to do. I bumped into mention of another “service bulletin” tonight, on YouTube, posted two weeks ago by one of the forum members … it doesn’t seem to show up on my VIN, and I haven’t experienced the issue.
Wobbly handlebars on the Ducati Hypermotard 698 Mono RVE !! How to fix !!!
@dunchooby 2 weeks ago
There’s a service bulletin to replace the bolt, bushings, and washers. Mine were replaced free under warranty, if anyone else has this issue don’t be scared to reach out to your dealer.
