I have experienced this whenever I drive for over 45 minutes in rain.

The bike starts to splutter and loses power- today it resulted in me calling out a mechanic.

Could anyone advise

BA 02
Unifilter- with a1 snorkels out
petrol with additives
inline filter

mechanic thought water was getting into the engine or electrics- used wd40 all over the bike and suggested the spark may have been shorting?

Also said water may be getting into the air filetr and getting sucked in as it dripped under the seat?

How can I test this and narrow it down- im sure it is NOT the fuel

"Id rather have a bottle infront of me than a frontal labotomy"