Honda Express spark

This seems to be an odd one to me. My 1980 MC50 ran fine a few days ago. Now, after several rainy days in Florida, there is no spark. The bike got wet. Now, no spark-well, almost. I cleaned and set the points, checked capacitor and coil to be sure they are dry. Here's the odd part- when I release the starter spring with the plug removed from the head, but connected to plug wire and plug grounded, I get one solid spark every time I move kill switch or ignition key to "off", then "run".One spark each time. If I jiggle the switch or key several times while engine is being turned via starting spring, I get several sparks. But- only 1 at a time!! Any ideas?

Sounds like something grounding somewhere, but, why the solitary spark? Thanks, Ron

Re: Honda Express spark

Jonas Quimby /

Water has probably gotten into the switches of the grip, and possibly into the headlight area.

The problem might even go away if you wait a day or two.

Re: Honda Express spark

Cleaned and dried all areas to the best of my ability.Still no change. One thing I found out- holding plug wire, even with insulated pliers NOT A GOOD IDEA!! Got knocked on my behind! Seems like lots of voltage present. Tried several plugs-resistor and non- none work other than originally described.Maybe plug gap of .028" too wide?? Could plug wire itself be leaky??Plug wire boot never firmly attached to wire, but ran great a few days ago. Plug boot resistor inside?? Is this replaceable? Or, does it have to come with the coil?? Thanks to all.

Re: Honda Express spark

you got good spark if you got knocked on your ass..

Do a better job of cleaning switches .. blow them out with compressed air and squirt WD40 into the switches .. that stuff displaces moisture and helps electrical contact.

Re: Honda Express spark

Jonas Quimby /

Your gap would be .026" but I cant see that tiny differance being enough. The proper spark plug is an NGK-BP5HS.

Honestly, if you're getting power to knock you over, you should be getting a spark.

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