hey guys i hope someone can help me out
i have a nsr250rk5 mc18 which is sick as a dog

it misfires when running
overheats very quick
throttle rsponse is crap

have cleaned carb, filter, new plugs
did notice the cable for the oil pump was lose so i changed it to the settings you have on the tech page
but still runs the same

the bike is total standard
im a amatuer when it comes to fixing things so i hope someone has any advice or help