I have a really strange problem with my suzuki gsxr 600 srad. When I start the bike from cold, I put the choke on and start it, it runs fairly nice. If I try to touch the throttle before the temperature gets to about 70 degrees c the engine just dies. As soon as it gets to about 70 degrees it runs fine and goes like a rocket. As I am a car mechanic it seems to me that it may well be a fuel problem but I'm really not sure so any help would be most appreciated. Thanks

1) Has bike been sitting for a while?
2) Happened all at once?
3) Air Filter OK?

The problem just happened suddenly. Bike was running fine before that + the air filter was dirty but not that dirty to stop it running