Can I install an oil pressure gage or warning light?
Because the crank rides on roller bearings rather than hydraulic ones, the KLR has a low pressure spec: 11-21 psi at 90F and 4000 rpm. The ultimate info on adding an oil pressure sensor can be found in post # 61914 of the DSN_KLR archives. In short, the best way to add a pressure port is probably by stacking a second banjo fitting on one of the camshaft feeds. Beware that adding a tap may add a failure point.