Alternator alternatives?

MrButter

Joined
Dec 3, 2017
Messages
26
Location
Barcelona
Bike
MotoGuzzi Griso 1100
Hey

My ST has been laid up after a charging issue breakdown.... last day of the tour, so no big deal.... 143k miles on the clock ...

Haven't stripped it down, but have been checking parts prices :eek: .... a new Honda part is worth more than the bike ...

Dumb question , but I have seen aftermarket 40amp "ST1100" alternators advertised , that look identical to ST1300 item... at a very nice price

ebay link

I have searched (a lot) but cant find anything to confirm or deny the ST1100 alt being the same fit . Part number is different of course, but I am having a hard time deciding what to do - don't fancy a used / reconditioned item as I want a fix it once and forget solution (but dont want to pay for it.... )


Any advice gratefully received
 
It sounds like you have a winter project on your hands. But I am curious as to why you think it is the alternator that has failed and not the wiring and/or connectors that have let you down?

But if it is the alternator, it may be worth investigating having yours reconditioned. Check out what they do to recondition motors / alternators. They make them good as new without paying good as new prices.

Heres a link I found in the uk with just a two minute search
 
Reconditioned parts have been used for years without frequent failures. I suppose it all comes down to who does the rebuilding. You might consider a used alternator - if you really need one from a low mileage wrecked bike.

Have you taken your alternator to a shop that can test it to ascertain if it really did fail? Motors have been rewound for years, and an alternator is not that much different. If you ask around you might find a shop with an excellent reputation. This could save you money.
 
I did experience an alternator failure on my ST1300 and ended up replacing it with OEM.

Here are my thoughts at the time. You have to access the alternator to completely troubleshoot the failure and that took me about 5 hours labor. I live in a city of a million+ population and there were only two shops at the time that still took on rebuild work. One declined to look at it after hearing it was shaft driven because a bench test requires a pulley on the alternator to spin it. The other shop had actually done two one-off rebuilds for me in the past - a old boat engine alternator and a 80's BMW starter and they said to bring it in for a look. They determined it was a simple repair to replace the rotor and checked on replacement Denso parts, which were available. The bike had 116,000 miles IIRC and they would replace the diodes and shaft bearings along with the rotor for about $380 in parts and about 1 hour labor. False economy to replace just the rotor at those miles. The kicker was because after having it a couple of days they weren't able to rig up a pulley so they couldn't bench test it and without testing it to make sure it worked properly so they couldn't warranty the repair. A new OEM alternator was $509 at the time. I did not want to do the repair with 10 hours labor on my part twice so to me it was worth getting a new part with Honda's one year part warranty.
 
Thanks Guys . I suppose I am jumping the gun on a dead alternator , so thats step one... No rush as no two-up touring planned for the forseeable future, so will start the strip down once I get my garage back (currently full of windows being painted .... :mad:)
 
MrButter said:
Thanks Guys . I suppose I am jumping the gun on a dead alternator , so thats step one... No rush as no two-up touring planned for the forseeable future, so will start the strip down once I get my garage back (currently full of windows being painted .... :mad:)
Click to expand...
Mr Butter, check out the other alternator enquiry today with the Gumtree link.
Upt'North.
 
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