ok the panel that has the key lock for the seat on it has a cable running from the loak to the seat latch,try to put something up behind it and pull on the cable or wherever you can get to it this should pull on the cable enough to release the seat .the ignition lock is not the type that has a number on it that related to a key like it used to in the 80's these locks need to be coded by a locksmith and a key can be made like that i used to use keys galore in london but a lockset may not be too dear for this bike anyway i get a price for a pattern lockset if you want ?
adam bike doctor(of milton keynes motorcycle centre)
February 2011