Check your chain tension/overall condition also.
All my dukes have been a bit clunky when I first got them, but either fitting a new chain or adjusting it to the correct tension really helped in finding gears/neutral etc.
Edited to add: I have just read your reply on the thread about my chain letting go...I definately recommend you take a look at your chain now !!
[Edited on 25-8-2005 by Harv748]