[Shazaam!]

Engines need more fuel for a cold start because there is no heat in the ports and chambers to keep the fuel atomized as vapor, so it stays as a liquid. Fuel as a liquid burns very badly in the combustion chamber, so throwing extra fuel at it ensures enough stays as vapor for some sort of combustion. Too much fuel and you foul the plugs.

One of the problems with shower-type injected bikes like the 999 is HOW you start bike can result in problems. You can easily flood or foul plugs with shower injectors because much more of the initial fuel spray from shower injectors condenses on the cold surfaces of the throttle bodies and intake tracts before it can get down into the combustion chamber to aid startup.

So the method of starting is different.

In particular, do not open the throttle or engage the fast idle lever until the engine fires up. You must simply hit the starter button and wait for the engine to come to life. Attempting to crack the throttle open will only force you to run the starter motor longer (and possibly drain the battery). Once the engine begins to idle, you can open the throttle or fast idle lever at any time.