Thank you for looking into this for me, I was stumped. I will continue the build and if when I start it up and I missed the nipple<giggle> it will be very apparent. Blocking off was going to be my cure.
I will post some picks when the engine assemble is complete.


This form is awesome because of guys like you.
Thank you very much.
Roy Gorman

 

I can't see that hurting anything. The cooling is done through the main coolant lines. That nipple (snicker) may be air bleed off for the upper section of the pump.

 

I've got a 91, when I get a chance I'll check my 'old lady's nipple (tee hee) status

 

Hi RoachKing...
Haven't got an answer for you yet.
Don't have time at the moment but here is my research for you thus far. Pictures are from 1990 and then 1994 models.... might help your research further..... A small note... that the connecting pipe is in the BLOCK not the HEAD.



http://dl.dropbox.com/u/13500879/cbr...ater%20(1).JPG



http://dl.dropbox.com/u/13500879/cbr...ater%20(2).JPG



http://dl.dropbox.com/u/13500879/cbr...ater%20(3).JPG



http://dl.dropbox.com/u/13500879/cbr...ater%20(4).JPG



http://dl.dropbox.com/u/13500879/cbr...IMG_1934-1.JPG



http://dl.dropbox.com/u/13500879/cbr...6%5B1%5D-2.JPG



http://dl.dropbox.com/u/13500879/cbr...5%5B1%5D-7.JPG



http://dl.dropbox.com/u/13500879/cbr...%26%20pipe.JPG

 

When looking at your bike Naga, especially without its clothes on, I always feel it's cleaner than me.

I'm off to have a shower!

Cheers, SB

PS Good job on the sleuthing. All will be revealed soon I'm sure.

 

lol a bike that clean is the work of a sick mind !

 

But that is BEFORE I cleaned it!!!

 

 

Naga_Thai is correct, the nipple is on the cylinder block. I rotated on of your photos to make it right. Also you can see on the '91 where the nipple should be.

 

I still don't have an answer for this but here are some additional facts that might help us all to resolve this.

The missing nipple is proven to be on the cylinder block of CBR1000F series 2 and 3 (1990 - 1997 <depending which country your in>).

The CBR1000F series 1 (1987 - 1988 <depending which country your in>) had a different head, cylinder block and cooling system. This different system had NO NIPPLE ON THE BLOCK.

Photos following are 1988 model....