Please bear with Me....
My mp3 300ie yourban has been great in all weathers. its done 30k now.
Got caught in heavy rain I have a weird issue.
So drove about 5 miles scoot running fine, stopped for fuel, on start up the scoot was running rough. Thought yeah probably getting water somewhere.
Struggle home and left it overnight. Started fine on morning and my 10 mile commute to work was fine. ( dry but cold weather)
Thought I will stop at spares shop on way home and pick up a new spark plug and some WD40, drove to shop fine, then on startup the scoot is running rough again like damp was making it miss again. weather still dry.
Rumbled home and got the engine light come up a few times.
Got home and give the coil and lead some WD40, left this overnight.
So third morning scoot running fine, done about 8 miles to work, thought I would stop and simulate issue from previous day. Turned scoot on and back on running rough again.