Tue, 4 May 1999 15:12:31 +0200 - Message No. 5631
From: Pelissero Cesare

Subject: 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 .
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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