No experience with that particular issue here either, but I like to
study up on such things.

Judging from the exploded view of the alternator assembly for your
bike, I agree with Allen that the alternator looks like it's driven by
a shaft, not a chain.

If you are hearing chain noise (sounds like marbles rattling around
the inside of the engine), it's more likely a cam chain tensioner
issue, caused by a weakened spring that maintains the tension.  That's
a known Honda issue.

If I'm correct (and I could very well not be), that could be a
blessing.  According to the exploded view I looked at, most of the
alternator assembly parts for your bike have been discontinued.

If it's the cam chain tensioner, that's repairable, but I can't tell
you how.  You'll have to get a Clymer or Honda service manual and
study up on the procedure.  I'd be wary of what your shop tells you.
It doesn't sound like they specialize in Hondas.

You can see the exploded views of all the assemblies on your bike at
this link:

http://www.servicehonda.com

To navigate to your bike, click Easy OEM Lookup/Motorcycles/Honda,
then the year and make of your bike.





On Nov 29, 10:34 pm, ej <[email protected]> wrote:
> Hey all,
> have had my 83 cb550sc for about 15years now, I don't own a car so I
> ride 365.  well the bike is making noise and the shop says it is
> alternator chain, has anyone replaced one? How hard is it? what
> happens if I don't replace it?  Any help would appreciated.  I am at
> 57k miles and want to keep riding.  thanks.

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