hi, does anybody know where can find the head steering bearing for 906 ? :thanks

from your Duc dealer no, honestly were are you located ?
On the bottom right of the SKF homepage you`ll find a list of distributors selling to end customers:
http://www.skf.com/portal/skf_us/home

If you are in Europe and not knowing if the seller will ship outside Germany, this would be a good deal:
http://cgi.ebay.com/2-x-Kugellager-Kege ... dZViewItem

G.

PS: a few days ago I made a summary of bearings in the P750 FAQ

The code for the steering head bearing is 32005X-90KA1. The cones will come out with a pin punch but you will need an angle grinder to cut off the bottom bearing.

The bottom race can be a PIA. If it's hard to remove then cutting a slot in it will make it slide right off.