BiG DoM
Registered user
The 04 (and 05 I think) had WP suspension. The 06 has Showas (hence the different knob)
To best of my knowledge none ever had WP's (in this neck of the woods anyway) ... twas rumoured the new 1200ADV would have WP's but alas no.
The knob change as far as I know was just a fitting detail thing, change on Showa production line.

I can see how having ABS would be usefull though.