Hard Time starting up my 06 Wr450f "Help"

I need to know if anyone could give me an answer, because this is what is going on I have a 2006 wr450f and it's almost impossible to kick start it, while it's cold, I even have a hard time to eletric start the first feel times so most of the time I just push start it, but after it warns up it's ok. So I need help, maybe if there is any adjustment that can be done. Now here are some things that I have done, I've changed the Fuel Mixture Screw and the WR AIS Removal Kit. So this is probably the reason, but I need a advise from someone that know what to do.

I need to know if anyone could give me an answer, because this is what is going on I have a 2006 wr450f and it's almost impossible to kick start it, while it's cold, I even have a hard time to eletric start the first feel times so most of the time I just push start it, but after it warns up it's ok. So I need help, maybe if there is any adjustment that can be done. Now here are some things that I have done, I've changed the Fuel Mixture Screw and the WR AIS Removal Kit. So this is probably the reason, but I need a advise from someone that know what to do.

couple things: did you rejet your carb? your probably lean. has it sat for a while? if so pull the carb and clean. also have you had the valves check. this is also a sign or hard starting.

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