I have a problem on my 600 GSXR.
When cold I start using the choke - fine it starts, and revs at about 4k but then it drops down on the revs and stalls.
It also stalls if I am dropping down gears from high speed and it seems to be an associated problem.
When warm it doesn't happen - any ideas.

Idle speed is slightly above what it should be at 1400rpm - due to this problem.

The choke seems to be working as it should (as I have had it apart to check)