Rewinding SC24 Stator CBR1000F

This forum has helped me get my 31 year old damaged barn find rescued bike up and going. This tutorial is a small thank you to the good people on this CBR forum who willingly and unselfishly give us their time and deep knowledge to keep our motorcycles going.

Read First

Please note this tutorial applies only to the second gen oil cooled SC24 and not for the 87/88 first gen SC21. Unfortunately these are no longer factory made anywhere. So I suspect we'd all better get used to doing stuff like this ourselves.

Some Key Search Words:

Honda CBR1000F Hurricane SC24 LD125-52 stator generator alternator rewinding

Honda part number 31130-mt3-003 / 31130MT3003
AND 31130-MS2-611 / 31130MS2611


Compatible Honda Motorcycles (visually check yours first)

· HONDA CBR1000F 1990-1996

· HONDA ST1100 1991-1995

· HONDA ST1100A 1992-1995

· HONDA CB1000 1994-1995

· HONDA CB750 NIGHTHAWK 1991-2003

Step Number One. If you can find a stator rewinding professional you can trust - do it. If the global postage system wasn’t in such disarray, mine would have gone straight to Roger Lovelock at Info@Bbbikeshop.Co.Uk who reconditions these for the SC24 – at a reasonable price.

Caveat: I have never rewired a stator before so there might be better ways of doing this. I strongly recommend installing a simple digital voltmeter on your instrument panel, attached to your battery, to monitor charging while engine is running afterwards.

Technical Info

This is a 36 slot 3 phase alternator. It produces AC current which is converted to DC by the regulator/rectifier. Original copper wiring is 1.11mm thick (including enamel coating) and you will need 10 unbroken metres of wire for each phase. 30 metres in total. Your replacement wire must be also be enamel coated. There are 13 windings around each slot pairs and 6 slot pairs/coils for each phase.

Before you start, also have a look at these links and other ones like them:


https://www.instructables.com/How-To...an-Alternator/

https://www.hondatwins.net/threads/d...-rewind.18510/

You can either do less winds with a thicker wire or more winds with a thinner wire. Go with less winds at slightly thicker.
Attached below is a picture heavy .pdf and Microsoft Word with further detail

 

Seems I can't have two attachments on one post... Here's the Microsoft Word version

 

What a great write up NZ Zim,
That must have taken you some time. Thanks for that great effort.
How is yours running now?
Could be a new one for the 'stickies' mods?
Cheers
Al

 

Thanks - hopefully someone else can benefit from the post. It's almost impossible to get a replacement stator for these.

Bike's going well - charging the battery when riding between 13 and 15 DC. No problems after 300km. Touch wood. Clear autumn days here, so have been commuting to the CBD and back (70km).

Enjoying the smooth responsiveness and the howl out of the replacement Speed Triple exhausts. Surprisingly nimble on the move even threading through Auckland traffic.

Would have liked to have trialled your CBR600F4i but they're very few and far between here. People seem to hold on to them. And their values don't show signs of dropping any time soon.

 

@NZ Zim Really nicely done sir and thanks for doing that. I'm not sure I would have been that adventurous. But now I would at least give it some consideration.

 

NZ Zim,
Yeah the F4i and its previous incarnations are tremendous machines.
The F4i is more of a bike than I will ever be a rider. I have owned 3 since 1998 with an FW then two F4i's I only sold my 2005 model as I was going to the states for a few years and could not take it with me (almost impossible to import unless they are vintage). But of course got lonely and had to get another and fortunately I was able to bring it back with me.
It only had 1900 miles on it when I got it and it will stay with me until I hang my boots up

 

Hey! I know it’s been a while but is there any information out there on rebuilding the electro magnet ?