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 Rear end transmision noise

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3 posters
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micbusathens
Maxi-Scooter Rider
Maxi-Scooter Rider
micbusathens

Number of posts : 199
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PostSubject: Rear end transmision noise   Rear end transmision noise I_icon_minitimeThu Jun 02, 2016 4:36 pm

Has anyone ever experienced a noise at rear left end like "clunk" every time he opens throttle after an instant close of it?Sometimes it can be heared at take offs.Its not the final transmision gears or from a free play of weels center gear.Looks like to me like noise of a worn bearing with free play at his rotating part
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Cosmic_Jumper
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Cosmic_Jumper

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PostSubject: Re: Rear end transmision noise   Rear end transmision noise I_icon_minitimeThu Jun 02, 2016 6:04 pm

Possibly the clutch shoes, or maybe the variator weights. It certainly is worth the effort of removing the belt case and checking out the noise while the scoot is up on the center stand. While you are in there take off the 22mm Driven Pulley nut and remove the Driven Pulley assembly and inspect the clutch.

Tim
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micbusathens
Maxi-Scooter Rider
Maxi-Scooter Rider
micbusathens

Number of posts : 199
Age : 59
Location : Athens Greece
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Registration date : 2012-04-05

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PostSubject: Re: Rear end transmision noise   Rear end transmision noise I_icon_minitimeThu Jun 02, 2016 9:32 pm

Τhere's no sound withought load on the bike.So on the center stand you csnnot hear it
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Cosmic_Jumper
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Cosmic_Jumper

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PostSubject: Re: Rear end transmision noise   Rear end transmision noise I_icon_minitimeThu Jun 02, 2016 10:05 pm

What happens if you hold the rear brake while the scoot is on the center stand? That should put enough of a temporary load on the rear gear box and drive line to help identify the source of the "clunk" --especially if you have the belt case removed.
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micbusathens
Maxi-Scooter Rider
Maxi-Scooter Rider
micbusathens

Number of posts : 199
Age : 59
Location : Athens Greece
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Registration date : 2012-04-05

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PostSubject: Re: Rear end transmision noise   Rear end transmision noise I_icon_minitimeThu Jun 02, 2016 11:50 pm

I will try that just before honda dealer
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Easyrider
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PostSubject: Re: Rear end transmision noise   Rear end transmision noise I_icon_minitimeFri Jun 03, 2016 12:32 am

Could be a loose Swing arm? Could be binding. Check the torque of the bolts. Maybe the calipers are loose and binding. My 2¢
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micbusathens
Maxi-Scooter Rider
Maxi-Scooter Rider
micbusathens

Number of posts : 199
Age : 59
Location : Athens Greece
Points : 3631
Registration date : 2012-04-05

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PostSubject: Re: Rear end transmision noise   Rear end transmision noise I_icon_minitimeFri Jun 03, 2016 1:26 am

I have checked all of these.Now I am nearer to bearings.Thanks for your attention. I will inform about the outcome
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micbusathens
Maxi-Scooter Rider
Maxi-Scooter Rider
micbusathens

Number of posts : 199
Age : 59
Location : Athens Greece
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Registration date : 2012-04-05

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PostSubject: Re: Rear end transmision noise   Rear end transmision noise I_icon_minitimeFri Jun 03, 2016 5:00 pm

Issue solved

Three bearings replaced.One needle type and one ball type just behind rear drum and one closed sealed type on the inner metal band cover.Only the ball type one was completely damaged
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Cosmic_Jumper
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Cosmic_Jumper

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PostSubject: Re: Rear end transmision noise   Rear end transmision noise I_icon_minitimeFri Jun 03, 2016 10:37 pm

Glad to hear that you got your "clunk" sorted out. I find it odd that the clutch bell bearing went bad given that it is pretty much bathed in oil. I am very curious how the needle bearing and that sealed roller bearing were removed given that they are " buried" in the Driven Pulley sheave. Yes, those parts are shown as being available as spares, but my "experienced" local Honda dealer said that they had no idea how they would go about removing/replacing those items and that they would replace that Driven Pulley w/ bearings sheave section as an entire assembly.

Which also speaks to just why I perform all my own service and maintenance.

Glad you got your problem resolved.

Tim
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micbusathens
Maxi-Scooter Rider
Maxi-Scooter Rider
micbusathens

Number of posts : 199
Age : 59
Location : Athens Greece
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Registration date : 2012-04-05

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PostSubject: Re: Rear end transmision noise   Rear end transmision noise I_icon_minitimeFri Jun 03, 2016 11:48 pm

From fsc 02 to 04 parts catalog all they change were bearings no 19 and 20 from driven face and no 27 from swing arm(can't load the pages)None of them I believe was bathed in oil.He also mentioned that some hidden "balls"at the back were completely dry.I saw two bearings damaged from the effort to extract them.He charged me just 100 € totaly, cause he felt quilty by advising me from the beginning to buy an overall slightly used transmission set which cost me 170 euros and now I can't return it back.
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Cosmic_Jumper
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Cosmic_Jumper

Number of posts : 3823
Age : 78
Location : damn near Philadelphia, PA
Points : 8861
Registration date : 2009-06-12

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PostSubject: Re: Rear end transmision noise   Rear end transmision noise I_icon_minitimeSat Jun 04, 2016 8:34 am

Thank you for the update. Now I understand which bearing you were referring to.

That big outer bearing (#27) is "tedious" to remove. It requires heating that area of the belt case (#4, Cover), both inside and outside, with a heat gun to loosen the bearing's grip, then slamming the belt case on a supportive block of wood (so the case isn't damaged) to drive out the bearing. Yeah, it's a bear of a job.

I had misinterpreted your comment about "one ball type [bearing] behind the rear drum" to be the #15 bearing on the Transmission page which is the clutch bell seal and is kind of bathed in the transmission oil.

Tim
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micbusathens
Maxi-Scooter Rider
Maxi-Scooter Rider
micbusathens

Number of posts : 199
Age : 59
Location : Athens Greece
Points : 3631
Registration date : 2012-04-05

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PostSubject: Re: Rear end transmision noise   Rear end transmision noise I_icon_minitimeSat Jun 04, 2016 4:35 pm

From page 1-26  "Driven face"   at the left top, inside the compartment 9, the bearings are :No 19 bearing radial ball and no 20 bearing neeble from a dry enviroment
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