spark plug is black need help!

[honda 400ex 69]

i use so many spark plugs cause after every ride they turn dark black so i have to put a new one in cause my bike wont start.

what is wrong and what should i do?

[RiPPiNiTuP7]

Sounds like your jetting is too rich...I would lean it up a bit...

[honda 400ex 69]

i have a pro circuit t4 pipe with stock air filter and a dyno jet kit


should i try my stock main jet?

and should i mess with my fuel mixture screw cause when i re jetted i think i turned it out a lil like it said

thanks for the help

[stupid driver]

take baby steps. run a few throttle tests. thats wut u gotta do to hit it on the numbers