Missing Brake Bias Valve? Help me get to the bottom of it

[Tamshoe]

Right, so it looks like there is no rear brake bias valve present on my 2002 VTR's axle.
http://i1147.photobucket.com/albums/o546/tamshoe/7989F5A6-174F-40CC-A3DE-455EF39CB5E6-5900-000005EC644ECC34_zps08a14135.jpg
http://i1147.photobucket.com/albums/o546/tamshoe/8806427E-E1ED-4AE4-B383-A13D0349AC2E-5900-000005EC5EBA5B81_zpseb07e07e.jpg
Looks like there is just a solid manifold block where the two lines come from the front then from the block to the calipers.

Am I right in thinking that all VTR's should have a brake bias valve?
I am curious now as I'd like to adjust the bias even more so now it appears I can't actually do it.
Thanks

[welshpug]

its there, just looks like half of it is missing, inc the spring and lever arm.

[saxokid100]

My vts came without one on from new.....

[Tamshoe]

It's just a solid block, there's no threaded holes to mount anything to it, so nothing has been taken off it in a previous life, it appears to be the original axle as well.
I can't work it out, it's pointless, as it has 2 inlets and 2 outlet ports, with no other visible use?

Your VTS have the same looking block on it saxokid100?