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Can bad jetting make hard starting? What colour should my plug be?

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I have an 07 WR450,

170 Main

50 Idle

Neddle in third clip.

When the bike is cold, it starts first revolution of the cycle.

WHen the bike is hot, it takes the throttle being turned to about 1/4 to get the bike to start. Even with the hotstart lever pulled in.

To me the bikes runs faultlessly when riding, it is just the starting that is hard once hot. The bikes valves are fine, as i thought that could be the problem, so my next guess is flooding??!!

I really don't know how to check if it is lean or rich, can someone tell me what colour plug i should be looking for

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