Charging woes

[posplayr]

Another poster had a stator question on 79 gs 850, so I'll ask a dumb question. When you replaced your stator, does it have the same number of poles as your original unit? Apparently, it should have 12- and your rotor would then need two sets of north / south magnets .

stator and rotors must match.

So if I have this right the rotor has to place a magnetic segment directly over each pole in a phase at the same time as it spins moving from one pole to the next. So the magnetic segments (on rotor) have to be the same as the number of poles per phase (these are 3 phase systems).

With 12 pole there are going to be 12/3=4 poles per phase. The poles are 360/4=90 mechanical degrees apart.

With 18 pole there are going to be 18/3=6 poles per phase . The poles are 360/6=60 mechanical degrees apart.

[BassCliff]

Hi,

Yes, I was reading this thread thinking the same thing.

The stock '79 GS850G uses a 12 pole stator. The '80 and later use an 18 pole stator. I don't know of anyone who sells a 12 pole stator new. You can, however, get them rewound at several places on the internet.

If you put an 18 pole stator in a 12 pole rotor, it won't work. You can replace the rotor with a later one to match the 18 pole stator and all will be well.


Thank you for your indulgence,

BassCliff

[Ta2Mike]

I honestly cannot remember if its 12 or 18. I didnt know there was any difference so I didnt pay specific attention. I ordered the part from Dennis Kirk and I believe it is an electrosport. Oh well I guess off comes the side cover to count poles. I take that back, upon looking through receipts its a ricks motorsport. Which appears to be an 18 pole. I still need to take cover off to be certain I suppose but that may be the fly in the serum.

[jbs80106]

FWIW, I had an Electrosport R/R not last me a year. They replaced it under warrantee...the replacement has lasted no problems.

[Ta2Mike]

Ok upon inspection. I did end up with and 18 poles stator, hence the no charging. So now to source a newer rotor. Now my question is this..is there anywhere I can find a list of bikes wit rotors that will fit? does it have to be off of a newer 850? or will a 750, 1000, 1100 rotor work? obviously most certainly 83 and newer 1100 is out b/c of big end crank.
Thanks
Mike

[BassCliff]

Hi,

If you visit my little website, and use the procedure on this page, you will create a list that looks something like this.

Part# 31402-45110
GS650G (1981)
GS650G (1982)
GS650G (1983)
GS650GL (1981)
GS650GL (1982)
GS650GL (1983)
GS650M (1983)
GS750E (1980)
GS750E (1981)
GS750E (1982)
GS750L (1980)
GS750L (1981)
GS750T (1982)
GS750T (1983)
GS850G (1980)
GS850G (1981)
GS850G (1982)
GS850G (1983)
GS850GL (1980)
GS850GL (1981)
GS850GL (1982)
GS850GL (1983)
(Supersede: 31402-45120)


Thank you for your indulgence,

BassCliff

[Ta2Mike]

Thank you once again BassCliff. Yet another question..what all will I need to swap? just rotor? or will I need corresponding starter clutch as well? Thanks to this site Im so close to being able to ride again I can almost feel wind in my hair and taste the bugs in my teeth. lol
Thanks
Mike

[BassCliff]

Hi,

Just the rotor/stator combo.


Thank you for your indulgence,

BassCliff

[Ta2Mike]

So if I acquire this.. http://cgi.ebay.com/ebaymotors/1982-...Q5fAccessories along with my new 18 poles stator i should be in business?