hydrophobic PW50s
My experience is that the PW has a very unprotected wiring harness, and that the lack of a rear half on the front fender pumps substantial amounts of water into the wiring bundle near the carb. Careful waterproofing of these connections and the connections behind the front number plate will allow it to run on wet days. I used a tube of electrical waterproofing goo from an auto supply and heat shrink tubing,along with spray sealer, scraps of inner tube and tie-wraps. Then it becomes a matter of cleaning out the mud that clogs the cylinder finning to avoid overheating.