Author engine vibration above 5K  (Read 3507 times)

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  • Offline Jggpossum   au

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      #20

    Offline Jggpossum

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    Re: engine vibration above 5K
    Reply #20 on: November 20, 2021, 10:10:10 am
    November 20, 2021, 10:10:10 am
    Thanks DougD. That makes completed sense and will help me make the decision for my first tyre changeout. I noticed the cupping on the front tyre so my life won’t be as long as I thought.

  • Offline Bubblehead   us

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    Offline Bubblehead

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    Re: engine vibration above 5K
    Reply #21 on: November 20, 2021, 12:48:12 pm
    November 20, 2021, 12:48:12 pm
    Running a higher front tire pressure will also reduce the cupping.  I run 38-40 on my R1200RT.
    Karl
    2021 F900XR Low
    2016 R1200RT

  • Offline rcb78   us

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    Offline rcb78

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    Re: engine vibration above 5K
    Reply #22 on: November 20, 2021, 03:54:38 pm
    November 20, 2021, 03:54:38 pm
    FWIW, the the GT tires had much more cupping than the non-GT version.  Though i wouldn't really call it cupping, more like feathering.
    I only got to run the non-GT set up to 6500 miles thanks to a damaged rear tire.  I replaced both instead of moving a new rear with a worn front.

  • Offline Jggpossum   au

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    Offline Jggpossum

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    Re: engine vibration above 5K
    Reply #23 on: June 19, 2022, 09:27:38 am
    June 19, 2022, 09:27:38 am
    I ended up replacing tyres at 15,000Km. The front tyre had reached the tread marker. The rear still had loads of tread but was noticeably squared off so I replaced both. What a joy to have new tyres - so smooth into and out of the corners compared with the worn ones. So its not just about tread wear its shape as well. Lesson for me.

  • Offline Jggpossum   au

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    Offline Jggpossum

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    Re: engine vibration above 5K
    Reply #24 on: July 02, 2022, 02:11:49 am
    July 02, 2022, 02:11:49 am
    Back on the original issue of engine vibration I have become much more aware of the level of engine vibration coming from the engine. It is not particularly RPM related and I figure it is just the inherent dynamic imbalance of the 270deg piston offset. Various links in this forum to a good explanation of why the 270 has the best overall combination of primary and secondary crankshaft balance for a twin, without further mechanical intervention, but it still has a small level of residual imbalance.

    This doesn't bother me when riding but it might help explain why my Gopro failed after about 6 months. It is mounted on the front beak of the bike and is a standard GoPro mount which is quite rigid. The unit does a terrific job of image stabilisation, but after a few months I started getting intermittent shutdowns or loss of video or corrupted files. This never happens when the unit is handheld. Whilst GoPro claim the unit should be able to handle this without problem, I am less convinced. I note that QuadLock are now producing an insulation mount for motorbike handles due to increasing reports of damaged lens assemblies in recent iphone models. All points to vibration.

    GoPro have replaced the unit and I have ordered an insulation mount from the USA as a precaution. This mount and the QuadLock mount fit easily inbetween the original mount and the device.

  • Offline LP17   au

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    Offline LP17

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    Re: engine vibration above 5K
    Reply #25 on: July 02, 2022, 04:40:05 am
    July 02, 2022, 04:40:05 am
    Hi Possum. Changing the subject just a little. You managed to get 15000 Km out of your first set of tyres. Mine were not Michelin but I only managed 9800 Km out of them. :084: I've gone to Michelins Road 5 GT this time but I'm not sure they will go much further.
    We must be riding in different countries.  :062::084: :020: 
    Last Edit: July 02, 2022, 04:41:33 am by LP17

  • Offline Jggpossum   au

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    Offline Jggpossum

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    Re: engine vibration above 5K
    Reply #26 on: July 02, 2022, 07:14:45 am
    July 02, 2022, 07:14:45 am
    Probably about 5-10,000k of my riding was on the Hume Highway and roads like the putty road between Sydney and Hunter Valley. Very good surfaces. Also I was learning to ride again - very tame.

    I doubt I will get much more than 10k out of this next set of Road5 as my throttle grip has become stronger.  :028:

    Yes we do live in different countries. Chairman Dan has made Victoria very special.  :150:

  • Offline LP17   au

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    Offline LP17

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    Re: engine vibration above 5K
    Reply #27 on: July 02, 2022, 11:31:00 am
    July 02, 2022, 11:31:00 am
    Chairman Dan and our roads are very bent,. That's why I go through the tyres. :047:

  • Offline Jggpossum   au

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    Offline Jggpossum

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    Re: engine vibration above 5K
    Reply #28 on: July 02, 2022, 12:08:43 pm
    July 02, 2022, 12:08:43 pm
     :046: