1100GS front wheel bearing question

This is relating to some problems I am having with an alloy wheel conversion that is documented in the GS MODS section.
The wheel bearing on the speedo drive side of my original spoke wheel has the inner `spacer` protruding about 4mm or so from the face of the bearing itself. Can anybody confirm if this is usual on the 1100GS?
http://i950.photobucket.com/albums/ad348/7qqqqqqq/BMW R1100GS 1997/givisilverpanniers003.jpg

yes it is usual. the alloy wheels don't use same LHS bearing as the spoked wheels and the bearing for the alloys don't need any spacer. check realoem.com

Superhypo said:

yes it is usual. the alloy wheels don't use same LHS bearing as the spoked wheels and the bearing for the alloys don't need any spacer. check realoem.com

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A useful site that.
The right hand bearings are the same in both the ally and spoked wheels
The alloy left hand bearing is specified as 20x47x20.6
The spoked left hand bearing is 25x52x20.6
Ok then, I now know I can`t just put a spoke type bearing in the ally wheel or use the spacer from the spoked wheel as it will not fit in the ally bearing.
If the rest of you guys who have done this wheel swap have had no problems I am now starting to think that the `new` speedo drive I have is probably from an 1100RS, not 1150RS as the 1100RS has the same bearings and that internal spacer as the 1100GS. This means that the speedo drive internal spacer should be a bit longer on the 1150.
Has anyone got one they could measure for me please and either tell me the overall length of the tube or put a straight edge across it and tell me how much the spacer protrudes toward the inside?

the 1150rt/rs speedo has 44mm

Superhypo said:

the 1150rt/rs speedo has 44mm

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That is most helpful. Just measured the one I have and it is about 39mm so that proves to me that I was sent an 1100RS part. I have now ordered the correct part. Thanks

btw what is the final incarnation of your wheel fender? you still have the 1100r one?

Superhypo said:

btw what is the final incarnation of your wheel fender? you still have the 1100r one?

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The 1100R one will not work. I tried it

bad luck