There are 3 identical banjo bolts used on the KLR650 oil pipe.
1st one by the starter motor, oil inlet to the pipe.
2nd one to the cylinder head, to feed the cams.
3rd one is above the engine sprocket, under the plastic sprocket cover.
They are 'black'ish, 14mm head size, 10 x 1.25p and have a single tiny little 1/16th inch diameter feed hole.
Which I will strongly urge you to drill to a full 1/8th inch. Especially the inlet banjo by the starter motor, drill 1/8th inch clear thru both sides. Let some oil into that pipe!
One can also drill 1/8th inch clear thru both sides for the cams.
I personally only drill one side of the banjo bolt for the transmission.
One can read about the PDW oil mods over here,
So did you have the oil pipe completely off of the bike?