Topic: newly installed Dyna S and rain don't agree

[nuke]

installed ignition and coils a few weeks ago(78cb750F2), and this morning I got caught in the rain. A few clicks into the rain and the bike went on what felt like 2 cylinders. Now could ANY exposed wire (in the new ignition system) cause this malfunction? What am I looking for? I'm assuming that the problem is in my new electrical work cause I never had a problem in the rain before, not that I saw alot may be getting in somewhere else?

Any info or past exp. with rain and    would be appreciated

thanks
 
nuke

[bryanj]

Probably the connections at the coil HT wires

[jaknight]

Hi nuke,

     Yes, I would check connections at coils; I have a Dyna S on my '74 cb750 K4 and I have ridden in hard rain many, many times and many, many miles.

     Never had a problem with my Dyna S; feet did get a might cold......

     ~ ~ ~ jaknight ~ ~ ~

[anparkinson]

Check the points cover - the cork gasket is pretty useless. I seal mine with silicon when I put it on and it stays dry. It used to lose a couple of cylinders for a few minutes even going through a puddle before I did that.

[Tim.]

Don't ignore the connection at the plug end.  Some fill the wire ends with dielectric grease and then push onto the plugs to keep water out.

I ran a CB650 points cover (cast aluminum) on my 550, and did my last motorcycle course on it in 2 solid 8 hour riding days in pouring rain.  Points/condensers and no problems.  No gasket, no silicone.

[nuke]

thanks for all the help guys, I'll check all the above mentioned and see what happens. It looks like rain for the next few days and I have to ride into work. (wife needs car)  I'll let you know what happens.

nuke