When you first receive your banjo you will notice that the bridge is flat to the skin of the banjo. You will need to first of all generously loosen the strings using the tuning pegs on the head of the banjo. Carefully lift the bridge up so it can sit upright under the strings. The right position of the bridge will be around 2” away from the tailpiece and in the centre of the banjo head.
To check that the bridge is in the right position you should tune up the low D string, making sure it is resting in the suitable groove in the nut and bridge. Then play this string open and then on the 12th fret. If the two notes are exactly the same (use a tuner) then the bridge is in the correct position. If the fretted note is flat then move the whole bridge slightly forward.
Repeat the same step for the High D and adjust the bridge accordingly. Once the Low and High D are intonated tune the rest of the strings and you’re ready to play your banjo!
We have found a great video on YouTube from 4stringjoe & Ryan Thomson that shows this and should make things a bit easier to understand, i must warn you though, there is an obscene amount of moustache going on.