Alternator only outputting 8.5 volts

[tallchris99]

R1100GS. So my battery is not getting charged properly. Is it worth repairing an alternator? Is this a viable option or am I better off getting one from Motobins and installing it myself/getting someone to do it for me?

 

[JJH]

Don't rush are you sure it's the altinator? JJH

 

[tallchris99]

I wonder if my bikes rattle is emanating from under the cover? I am off to skive and have a look see.

 

[tallchris99]

Don't rush are you sure it's the altinator? JJH

I won't rush as I am skint and rather busy. the bike has had an increasing rattle that does seem to come from that area. It's also developed a charging problem. I will report back. Avenues to explore welcome.

 

[Padowan]

Could it not be the voltage regulator/rectifier that's shagged, rather than the alternator?

 

[JJH]

That would be my first place to look. JJH

 

[ChrisH Kerry]

Voltage regulator is in the alternator - same sort of thing as car alternator.

 

[tallchris99]

Well I had the alternator belt cover off. The rattle is definitely coming from this area. I could see no movement in the main spindle. The rattle sounded like it was/is in the alternator case itself. Well at least the rattle is not coming from the engine/gearbox!!!!!

So, what next?

 

[Flipfly]

Replacement alternator (used one should be fine, afaik they are fairly robust)

 

[tallchris99]

Are they hard to fit?

 

[Flipfly]

Yep, piece of piss. Pm Steptoe, ride the bike over to him, hand over gold coins, bike fixed. Doesn't get any easier!

 

[warmshed]

8.5 volts is normally an indication one of the phases has gone down, possible a diode pack. Cheaper than a new one if you can get the part. Some factors do sell the bits and its not too difficult to do.

 

[Steptoe]

I've got a few used alternators kicking around, from £50 depending on condition.

 

[tallchris99]

I've got a few used alternators kicking around, from £50 depending on condition.

Sounds promising. What do you think the price of supply and fit would look like?

 

[tallchris99]

@steptoe?