Cheers for the responses!
Hustler/David - I haven't worked the miles out yet as I'm still buying maps/planning routes.
I've got maps ordered via ebay for Kazak & Mongolia that haven't yet arrived. I've made som enquiries about shipping (some mroe enquiries to come) from the states - so I get an idea of my budget constraints.
By Christmas I should have a pretty clear idea of routes/mileage etc In Jan, I'll start getting the visas i.e. for Mongolia, Kazak & Russia are looking more interesting.
Lisa, one of my mates has done this sort of thing before on his big bm - so I'm going to bribe him with booze to show me tappets, fork seals, puncture repair, chain tension.
Hadn't considered the government web site for travel info - stupid I know! Thanks for that tip - worth it for the Kazak border entry points alone!
I've been filling in a note book with all the stuff I think I'll need for the trip - based upon pervious experience, friends experience, thte hubb. I bought Chris Scott's book yesterday & so far a lot of the stuff I've written down has been covered in his book - so at least my planning is on the right tracks (but there's more info that I hadn't considered).
The more I investigate the more I'm looking forward to this!