My 08 venture, when ever I ride in the rain or wash my bike the right rear cilinder stops firing. blow off the cap & around the plug & it starts fireing again. I have checked the drain hole it is open so that is not it.what else ? I am thinking that the rubber on the cap is not sealing. so I put some grease in the cap & put silacone around all the places where the wires and ruber boots splice. Havent tryed to wash it sence. the silacone isn't dry yet. so dont know if it helped yet.
thank you for your input!!!