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Honda ST1100 Section => Honda ST1100 General Questions => Topic started by: Carsten on May 20, 2012, 07:28:38 PM

Title: 28 amp alternator for ST1100
Post by: Carsten on May 20, 2012, 07:28:38 PM

I have a question for the electrical gurus.  I have a 1994 ST1100 with, I assume a 28 amp alternator.  I run 35W HID lights, a GPS, cruise control and a spare 12V socket (charge phone or similar).  I am going to fit a set of Oxford heated grips and maybe spotlights at a later stage.  Will I need to upgrade to a 40 amp alternator?  Looks like it is a complicated procedure.

Title: Re: 28 amp alternator for ST1100
Post by: Brock on May 20, 2012, 08:00:34 PM

With the spot lights, you would be getting close to the max output, ( about 4 amps left ).

If you get a chance to upgrade then do it.

Title: Re: 28 amp alternator for ST1100
Post by: royst1100 on May 21, 2012, 03:33:05 PM

good luck finding one. looked for several years with no luck! ended up buying a wreck

Title: Re: 28 amp alternator for ST1100
Post by: alans1100 on May 21, 2012, 04:59:22 PM

Part number for my 40 amp is 31100-MAJ-G41 from David Silver Spares for 485 pound or about $780 plus postage

and from the US about $450 plus postage
http://www.hondapartsline.com/fiche_select.asp?mfg=Honda&partnumber=31100-MAJ-G41 (http://www.hondapartsline.com/fiche_select.asp?mfg=Honda&partnumber=31100-MAJ-G41)

Guessing both with postage would be way cheaper than local dealer price.

Title: Re: 28 amp alternator for ST1100
Post by: Carsten on May 21, 2012, 05:29:19 PM

Youre kidding me, that much!!!!!  Forget the spotlights, just go with heated grips.  Thats "divorce" prices.

Title: Re: 28 amp alternator for ST1100
Post by: walton on May 21, 2012, 10:32:30 PM

Or sell yours and buy an ex police model for the same price. Easy! :fp
 :wht11

Title: Re: 28 amp alternator for ST1100
Post by: Carsten on May 21, 2012, 11:15:18 PM

Then I'd be single.

Title: Re: 28 amp alternator for ST1100
Post by: walton on May 27, 2012, 06:32:06 PM

Easiest 40 amp alternator upgrade. Put your bike on the market for $5000 in a Brisbane news paper. Ride up to deliver. Buy new bike. Ride home.

http://www.ebay.com.au/itm/Honda-ST-1100-/320913550441?pt=AU_Motorcycles&hash=item4ab7f02c69 (http://www.ebay.com.au/itm/Honda-ST-1100-/320913550441?pt=AU_Motorcycles&hash=item4ab7f02c69)

http://www.ebay.com.au/itm/2000-Honda-ST1100-/150790495930?pt=AU_Motorcycles&hash=item231bd05eba (http://www.ebay.com.au/itm/2000-Honda-ST1100-/150790495930?pt=AU_Motorcycles&hash=item231bd05eba)

http://www.ebay.com.au/itm/HONDA-ST-1100-/160808449273?pt=AU_Motorcycles&hash=item2570ee34f9 (http://www.ebay.com.au/itm/HONDA-ST-1100-/160808449273?pt=AU_Motorcycles&hash=item2570ee34f9)

(http://img.photobucket.com/albums/v235/Avtrician/white11-rev.gif)

Title: Re: 28 amp alternator for ST1100
Post by: Carsten on May 27, 2012, 08:39:49 PM

If only it were that easy. 

Title: Re: 28 amp alternator for ST1100
Post by: walton on May 27, 2012, 08:44:06 PM

But it sounds great in theory.  :whistle

Title: Re: 28 amp alternator for ST1100
Post by: Brock on May 27, 2012, 11:02:06 PM

If only I had 15000 to spare

Title: Re: 28 amp alternator for ST1100
Post by: Biggles on May 28, 2012, 11:30:09 PM

Quote from: walton on May 27, 2012, 06:32:06 PM

Easiest 40 amp alternator upgrade. Put your bike on the market for $5000 in a Brisbane news paper. Ride up to deliver. Buy new bike. Ride home.

[url]http://www.ebay.com.au/itm/Honda-ST-1100-/320913550441?pt=AU_Motorcycles&hash=item4ab7f02c69[/url] ([url]http://www.ebay.com.au/itm/Honda-ST-1100-/320913550441?pt=AU_Motorcycles&hash=item4ab7f02c69[/url])

[url]http://www.ebay.com.au/itm/2000-Honda-ST1100-/150790495930?pt=AU_Motorcycles&hash=item231bd05eba[/url] ([url]http://www.ebay.com.au/itm/2000-Honda-ST1100-/150790495930?pt=AU_Motorcycles&hash=item231bd05eba[/url])

[url]http://www.ebay.com.au/itm/HONDA-ST-1100-/160808449273?pt=AU_Motorcycles&hash=item2570ee34f9[/url] ([url]http://www.ebay.com.au/itm/HONDA-ST-1100-/160808449273?pt=AU_Motorcycles&hash=item2570ee34f9[/url])

([url]http://img.photobucket.com/albums/v235/Avtrician/white11-rev.gif[/url])

They're all pretty coy about the mileage.  The only one talking about it has 128,000 kays.
I know they go forever, but things like plastic do deteriorate with age.  All depends whether they were garaged etc.
Still the price is right.  I got my first ST from the dealer in Moss St.  It was ex-Police with 92,000 and served the purpose.

Title: Re: 28 amp alternator for ST1100
Post by: saaz on May 29, 2012, 10:16:55 AM

Just make sure that it is not a pre-96 model, as the police bikes have the 28amp alternator as well, they just have a heavier duty regulator/rectifier.