How to mods a 2007 WR 450 f

I am riding my bike for the last three months now (weekend only), the only mods i did it is to change the throttle stop.(a lot more power)

i would like to know if i should re-jet the bike and what else i should do( i will like to keep the stock pipe), and also i weight 170 pounds should adjust my suspension? since i ride most trail and mountain?:

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