Allen Wrench, or Hex key. There is a truss rod cover on your B.C.Rich's headstock. Just open it using a screwdriver and you will find the truss rod. Then adjust the action using the hex key. check out
...allen wrench for this, it will be inside the soundhole on an acoustic usually, and on an electric it is normally on the headstock under a cover. There are many how-to's online about adjusting a truss ...
...Allen key bolts are most common, but some use a regular nut. Make sure you have exactly the right size tool before you start! With the strings at pitch, make a 1/4 turn clockwise (tightening). Retune ...
fretboard. use an allen key to gently turn the tension rod either way until the neck begins to straighten out. if the tension rod cannot straighten the neck, then the neck is warped from heat/humidity
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