Stalls when wet - 05 620

[seevtsaab]

This isn't yet a severe problem, yet. Only occurred twice but no doubt will get worse.
Only when riding in the rain. Purrs like a kitten otherwise, runs like a dream at 63K miles.
Stalls at idle. otherwise idles fine, noticed idle quickly 'blipping' down from ~1050RPMs, while stopped, and stalled.
Started right up and runs fine otherwise.

I suspect spark plug leads, and I'll spray some water in there to see if I can confirm.
Yesterday the bike wasn't really soaked but the engine was pretty wet after riding thru a quick but vigorous shower
then riding on wet roads for about 6 miles.

Any other likely areas I should suspect?

Bike has never given me a lick of trouble, I've never hesitated to leave it parked, or ridden, in  the rain all day.

[He Man]

Check your idle air hose, maybe its routed in such a way that its blocked off when wet (or waters getting into it).

otherwise check all your leads to make sure they are not shorting out. Any fuses blown?

[SpikeC]

Does the instrument cluster get wet?

[seevtsaab]

Partial follow up -

Idle air hose? i know nothing of which you speak. This just has the fast idle lever, no stepper and no IAC afaik.

Fuses all OK. Bike runs awesome.

Instrument cluster gets plenty wet, while at work or traveling to and fro I'm at the whim of the weather gods.
Even got a little dousing on the way in this AM, no hiccups.

I've replaced the rear plug wire, (received from friends at CCW) however for the front wire at the coil I need to remove the dreaded air box.
Didn't even try to access the coil from the throttle linkage side, should peek in there.

Reinstalling the air box is the toughest part of doing valves IMO.
Gotta thoroughly rinse the bike to get the dirt/mud/grime out so all that crap doesn't end up in my throttle bodies, so that's a weekend project.