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Vibrations,reasons and remedy?

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  • Vibrations,reasons and remedy?

    What exactly is the reason for our motorcycles to start vibrating?esp, foot-pegs and handle bars?
    im not referring to bikes that have vibrations from the showroom itself but bikes that start vibrating later on!
    is it due to some loose nuts and bolts?any specific ones?

    thank you
    Smoke rubber,not tobacco.

    -Life Through-the-Lens
    -For HELLA/VALEO [BMW/AUDI/FORD/LINCOLN/SKODA],P220,Aftermarket Projectors,pls contact me!

  • #2
    Query Approved.
    :)

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    • #3
      Mounting rubbers go hard. Time to change them.
      Yamaha RX165 5-Speed
      Yamaha RD350
      HH Karizma
      Honda NSR150SP

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      • #4
        ^ not just that a number of factors come into play..

        - the mounting nuts/bolts etc do loosen up slightly and need to be re-tightened from time to time.

        - Chain and sprockets start cutting and bedding in.. that eventually also adds to a lot of footrest vibration

        - Seals, bearings etc start wearing out.. You need to remember that in your single cylinder engine, its reciprocatory motion that gets converted to rotational.. so when the bearings and everything starts wearing out.. the vibes go up.

        - Eventually the rings also wear out beyond a certain limit and that adds to the vibrations ( the piston is free to move laterally )...


        My offerings to the gods of speed -

        - KTM Duke 200
        - Yamaha RXZ 5 speed


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        • #5
          Adding my 2 paise - cracked metals (experience from my rear bracket) & plastics, cotter pins
          Skill is what keeps you on a Motorcycle
          Awareness + Skill is what keeps you out of harm's way
          ATGATT + Awareness + Skill means you might Live To Ride another day

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          • #6
            +1 to JD666 and here's my 2 cents
            1. Broken fairings
            2. Loose fairings, gaps, no packing
            3. Broken plastic parts ( esp, under the seat and towards the tail)
            4. Mounting bolts loose. Etc.
            Never Argue with an Idiot !!!
            He will bring you down to his level and beat you with his experience.

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            • #7
              tnx guys.
              Where is this "foundation bolt" and "center bolt" located?
              Smoke rubber,not tobacco.

              -Life Through-the-Lens
              -For HELLA/VALEO [BMW/AUDI/FORD/LINCOLN/SKODA],P220,Aftermarket Projectors,pls contact me!

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              • #8
                Engine plays a major factor. On my first RX rebuild I saw the left web of the crank was from a RX135 and the right web was from a RX100. Junked it and bought a brand new crank. Vibes went down a lot, so did the weird wear pattern on the cylinder
                Yamaha RX165 5-Speed
                Yamaha RD350
                HH Karizma
                Honda NSR150SP

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                • #9
                  Originally posted by SunnyBoi View Post
                  Engine plays a major factor. On my first RX rebuild I saw the left web of the crank was from a RX135 and the right web was from a RX100. Junked it and bought a brand new crank. Vibes went down a lot, so did the weird wear pattern on the cylinder
                  WHOA!!! How could this Rx135 & Rx100 happen on a crankshaft?
                  Skill is what keeps you on a Motorcycle
                  Awareness + Skill is what keeps you out of harm's way
                  ATGATT + Awareness + Skill means you might Live To Ride another day

                  Comment


                  • #10
                    Well it happened and it ruined 2 oversizes on my cylinder. Opened the engine anyways since i felt the con rod play was a bit too much. Later realised this and went for a new crank.
                    Yamaha RX165 5-Speed
                    Yamaha RD350
                    HH Karizma
                    Honda NSR150SP

                    Comment


                    • #11
                      i'm also experience the same vibration in my 180 classic, i talked to a service centre to change the foundation rubber(mounting rubber) the mech said it cannot be change its fixed and cannot be replaced, and there's no way to reduce the vibration

                      is it true??

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                      • #12
                        I dont think they are fixed. The Service manual of the P180 UG3 says it has to be changed every 20k km.

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                        • #13
                          Originally posted by Ayson View Post
                          I dont think they are fixed. The Service manual of the P180 UG3 says it has to be changed every 20k km.
                          oh really, if its written in service manual, how can they say that it cannot be changed?

                          i talked wid the mechanic at that sc, and i think he said no just because he would have to remove engine and mount again after changing rubber? maybe he's aalsi or maybe he didnt want to work hard for those inexpensive rubbers

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                          • #14
                            ^^ u can always take it up with the SVC head!!


                            My offerings to the gods of speed -

                            - KTM Duke 200
                            - Yamaha RXZ 5 speed


                            Comment


                            • #15
                              Originally posted by jd666 View Post
                              ^^ u can always take it up with the SVC head!!
                              you're rite i talked with the head yesterday, he said it can be changed

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