engine misfire when wet

squirrel · Post by **squirrel** » Thu Oct 03, 2013 6:13 am

hi. i've done a search with no joy so here goes .if it rains before i ride the bike seems to struggle as if its running on 3 and half cylinders but only for a couple of miles after which it runs perfectley.the plugs are new 1500 miles ago as are the ht leads any ideas welcomed thanks

virgilmobile · Post by **virgilmobile** » Thu Oct 03, 2013 7:30 am

I had a plug cap arcing.A drain hole between the plugs plugged up.a hairline crack in one coil.
On a dark night,use a misting sprayer to locate leaking spark.remove the debre boot to be able to see into the plug cavity.Dont mix up the plug wires.I mark the cylinder # on the cap.
Don't soak the areas,just mist them.

mmode9 · Post by **mmode9** » Mon Feb 03, 2014 12:24 am

Had this problem too. I removed the seat and false tank and misted the ignition components. I couldn't see any arching but found a crack on the bottom side of an ignition coil. It wasn't visible when running but made the bike run so poorly I removed and inspected the coil and on further inspection it was readily visible.

1fastgl1100 · Post by **1fastgl1100** » Wed Feb 05, 2014 7:38 am

Mine does the same thing. if its wet out it runs like $hit until it warms up and then all is fine. I searched and searched and found nothing. I just live with it.

patbrandon1 · Post by **patbrandon1** » Fri Feb 07, 2014 1:43 am

Clean the ground that goes to the coils. I know it sounds strange, but clean and make sure it is very grounded, along with the main ground.

engine misfire when wet

engine misfire when wet

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