Do you have a 24 or a 36 slot motor?
are there any empty slots?
Adriaan, i've never heard of a motor that is wired with coils that are wider electrically than they need to be, they are always narrower so to speak. but perhaps its just semantics.
for example, the 24 slot 2 pole generator I wound with coils that spanned 10 slots. i can make a coil that spans 12 slots, which would generate a little bit more electricity at the expense of adding 10% more copper (would have had to make the coils 4 inches longer). so the winding is 10/12, .8666 or 155 degrees wide, out of 180.
But i can't make the coils span 13 slots, i mean i physically could, but electrically it would be just the same as a 11 slot winding, but with much longer wires to reach around the other side of the motor.
In all the motor engineering books i've read the electrical width of the magnet and coils are converted to 180 degrees. so for a two pole motor, the magnets span up to 180 degrees, usually 150 to 170 degrees. in a 6 pole motor, the magnets are still 150 to 170 degrees wide, but physically they are less than 60 degrees.
(the rotor in my generator was only 90 degrees wide, with a varying airgap, i could have converted it to 4 poles by bolting on two more arc shaped segments and reconnecting the two halves of the coil to oppose each other)
btw, when i was trying to decide how to rewind my generator, i looked around on the net for all the photos i could find for large two pole turbo generators.
most of the two pole generators i found were wound with coils that span 17 slots, the generators being 42 teeth. makes for a ratio of 9.42:24. some of them were wound with coils that spanned 24 slots and 60 tooth core, for an even ratio of .8 or 144 degrees, or 9.6:24. so i made mine 10 slots wide.
edit: so i google a bit again, looking for more photos.. found a lot more. its like google found more images for me. found some 72 tooth machines, also an 84 slot machine (might have found an 78 slot, two pole machine just now)
http://www.ethosenergygroup.com/_catalogs/masterpage/ethos/img/slides/stators-rotor-rewinding-slide1.jpg and it looks like the core is split in the middle and shifted half a tooth.