my bike started to die today. i rode to class in the rain, bike ran with no problems. after class i got on the highway and it rode just fine. i got off and pulled into the parking lot of a chinese place, then my bike wouldn't hold idle very well. I switched to reserve tank, and it still had trouble for a bit. walked inside, got my food, came back out, bike started up and got me home just fine. in the garage with the bike still on, i switched to main tank and it still idled fine.

any ideas? I'm thinking that some rain probably got somewhere it wasn't supposed to, or there was a batch of bad gas.

In the parking lot I would hold it at a steady 25%ish throttle and it would go like vrooooOOOOooOOOOOoooooOOOOm

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Quote from: rayshon on February 16, 2012, 01:11:48 PM
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Haha I had this happen to me, Thus living in florida..

Sounds like water may or may not of gotten inside your gas tank.. How I stopped this? I put painters tape over my gas tank cap before I knew it was gonna rain and my bike would be exposed. Looks terrible. keeps rain out. better than having to flush your whole system out.

I think to fix the gas tank cap problem you need to get a new one/replace gasket something along those lines. I just use tape as its cheaper/free. ^_^ PS: Don't use duck tape/scotch, will stick to your paint!! or worse.. Melt on!

Went thru a storm once and my idle became erratic and bike died after I got home. Turns out water had gotten thru my pod air filters. Took pods off for a day to let them. Was back to normal after that.

If your gas cap and fuel drain are ok, you shouldn't be getting water in the fuel just leaving it in the rain, but I guess it couldn't hurt to check the seal.  Likewise the stock airbox is designed to draw air from the driest possible spot up under the seat, so unless you have a leak somewhere or you have pod filters, I doubt you were sucking in moisture.

If your bike or car runs like ass in the wet, I'd first suspect moisture in the electrics.  Check all your connections are clean, snug and well insulated.  You can give everything a hit of WD40 to try and get a wet motor running, but be aware that the stuff dissolves electrical tape.  This can do more harm than good if you have an old hacked up harness that's mostly made up of tape.

Based on my own experience I'll go with ignition.  Most likely a loose spark plug wire in one of the coils if it is ignition.  Get it idling if you can and pull the plug wires one at a time to see if it will run on one cyl and not the other.  If so and it's a loose plug wire in the coil you can make a quick fix without taking anything apart by twisting the wire clockwise into the coil until it's tight.  The wires are supposed to be bonded tight into the coils and shouldn't turn.

i  allways  spray lots of WD40 on all my bike after they have been out in rain ,,stops rust and dispels water on elctrics

Quote from: tiprat on February 16, 2012, 09:18:48 PM
i  allways  spray lots of WD40 on all my bike after they have been out in rain ,,stops rust and dispels water on elctrics

HOPEFULLY NOT YOUR TIRES AND BRAKES.

 i would say you have picked up petrol with water in it .put a cup of mehterlated spirts in it and this will allow petrol and water to mix together and get burnt while running .Put  CUP FULL IN YOUR TANK EVERY MONTH AND YOU WILL NEVER HAVE A PROBLEM saves you pulling tank if its just water .This method will not hurt your motor.

Just took a 15 miles ride to the bank in 50F sunny weather, no problems.