Question About Engine Dying While Riding In Rain....

It happened twice already. First time, last month, I lost one cylinder only, this past weekend engine quit altogether. I let it sit for 10 minutes, and it starts perfect. Run under the rain, quits againg. I suspect the spark plug cables are leaking their juice while wet. Does anyone know of a set that is 100% waterproof ? This bike I have ridden for 10 years rain or shine, every day, I guess is time for some love and care...

 

Is a 2005 T100 Bonneville.

 

Thanks Sir, tried darkness no help. Will post final cure... Will try a bottle sprayer to see where is the water affecting the engine...

 

Thanks a lot. It is the rain / water no doubt. I ride this bike every single day and this only happens while ridding under rain, and after a few minutes while stopped, it goes away and runs good for a few minutes...

 

That makes a whole lot of sense !!! Matter fact, when the bike starts dying, sounds exactly like when it runs out of gas, one cylinder dies first, then a few seconds later, the second dies. It sounded so “ like out of gas “ that I even switched the gas ti Reserve thinking it was a gas issue !!! When it happened last sunday, the bike would run for maybe 10 minutes after restart, and same happened. Every time I stopped, I dried the tanks top with a towel, it was just very wet. I noticed that even after I ran over a water pond and water just sprayed everything, the bike kept on going strong like nothing had happened, but eventually later, much later, it will die, one cyl first, then the second. I stop, wait, then restart perfectly. I looked at the spark plug wires, and they were dry every time. What you found, is 100% in accordance with what I saw. I will check my gas for water, I will check the vents, I will spray water on the wires, and will check with a hose on the tank petcock if water around the gas cap eventually creates a vacuum and a fuel flow stop. Thanks a whole lot, I got a lot to check !!!!!

 

Thanks a lot !!! Will post the findings...

 

Here is a photo of the tank fill and gas cap. I tested the airflow on both and found this.... On the tube vent pipe shown inside the tank, with a hose attached, no air flow when vacuum, air flow when pressured a bit. On the gas cap, no air flow when pressured on the threads pipe and some air rather a bit difficult when vacuum the thread pipe. I hope this is normal. We’ll see...

 

Here is a photo of the tank fill and gas cap. I tested the airflow on both and found this.... On the tube vent pipe shown inside the tank, with a hose attached, no air flow when vacuum, air flow when pressured a bit. On the gas cap, no air flow when pressured on the threads pipe and some air rather a bit difficult when vacuum the thread pipe. I hope this is normal. We’ll see... View attachment 113203