Tue, 04 May 1999 06:53:16 PDT
- Message No. 5632
From: "Michael Janko"
Subject: Re: R:Chain Shaft
>Ciao!
>
>After two days with the help of a friend I have remove the engine from the
>A.T.
>In the next week end I'm going to open the engine! : - (((((
>The cost of the original shaft is L. 220.000 (220 DM)
>I have not idea about the origin of the problem.
>The chain DID is not very old and still good and I believe with the right
>tension.
>The sprocket is not original .
[Micha] And exactly that's the problem!!!!!!!!!!!!!!!
>From more than 1 year I have the schottoil system and in the sprocket box
>there was a lot of oil.
>My driving style is very soft.
>
>
>Bye bye
>
>
>Cesare
>
> > ----------
> > Da: Michael Janko[SMTP:micha_janko@hotmail.com]
> > Inviato: martedì 4 maggio 1999 12.54
> > A: bru@iitb.fhg.de; xrv@atic.org
> > Oggetto: Re: (XRV) Chain Shaft
> >
> > Hi guys,
> >
> > 67tkm, RD04, 91.....
> >
> > sounds like mine - with the identical problem. Not all of the teeth on
>the
> >
> > shaft are really gone and not all over but I think the only reason why
>is,
> >
> > that I checked it early enough. Cause of the costs of a repair (dismount
> > whole motor incl. new shaft ~ 800 Euro) I refused to do this till now.
> > With
> > the teeth left on the shaft I put a new sprocket? (Ritzel) on it and
>fixed
> >
> > it with two little plates (Unterlegscheiben) under the screws of the
>unit,
> >
> > that fixes the sprocket (Sicherungszahnring) This way the sprocket is
> > fixed
> > better and it works on my @ since 6tkm without getting the teeth of the
> > shaft ruined furthermore.
> >
> > Now to the point what causes the problem. The genuine Honda sprocket is
>so
> >
> > wide at the basis that fits on the shaft, that the teeth of the shaft
>are
> > covered on full length. Most sprockets from Polo, Gericke, louis, DID
>....
> >
> > are not so wide - they fit only on part of the teeth of the shaft. And
> > they
> > are of a softer material. So the power that has to be transmitted starts
> > eating up first the teeth of the sprocket and then the shaft. Especially
> > if
> > you don't grease the teeth when installing the sprocket! Metal moving on
> > metal.... don't have to talk further!
> >
> > So prevention: Use ONLY the genuine Honda sprocket - it cost twice the
> > price
> > ( ~29 Euro) of another second party sprocket - but it helps you saving
> > lots
> > of money!!! Check sprocket every 10tkm and grease the teeth of the shaft
>-
> >
> > it's also worth it and no big deal! As soon as you hear strange sounds
> > (Mahlgeräusche) from your sprocket check it!!! I refused to do so for
> > about
> > 3tkm and the damage was done. If your motor is not the newest (like
>mine)
> > the damage is done and you don't want to change the shaft or buy a
> > new-used
> > motor there is another solution. Get a new sprocket and fix it to the
> > (damaged) shaft buy welding it on (shaft has to be changed anyway
> > sometimes)
> > to the shaft. If it's done correctly, this will give you another 20tkm
>and
> >
> > time to earn and save money for a repair or new motor :-)))
> >
> > If you need more details - let me know.
> >
> > Micha @414
> >
> >
> >
> > >So the question is what caused this kind of damage? chain tension not
> > >low enough?
> > >
> > >Any ideas to prevent that damage?
> > >
> > >Rgs
> > > Hajo
> >
> >
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> >
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