Hey Barry:
With both not working hardly at all, my first suggestion is to check the connectors to the pod. There are four mulitpin connectors inside the pod. Make sure those are all on tight and retest her. If not, I would give my try a fix. I suspect that due to vibration or corrosion these speedos and tachs come out of adjustment. There is a calibration screw to adjust both. And they were hot glued into position when calibrated. You have to disassemble the pod to get at them and calibrate. Once calibrated....glue the adjustment screws in place. That's all there is to it.
The speedo on a quad has a pulse generator like that on a series 4. You should see a three wire connector near the brake booster and O2 sensor wire connectors. If the color coding is the same...the speedo to pulse gen connector has a pink, grey, and black wire. Make sure you pull that connector and fill with dielectric grease.
If you cannot get them up via the calibration screws....then Palo Alto does rebuild these units. I don't have their contact info...but I bet someone does.
Hope this helps,
John M