2006 st bob got water inside loose fuel guage cap

there are two drain holes in the recess and these get blocked up which prevents water from draining. as a result, water enters the fuel tank! you need to unblock the drain holes and clear the blockages. i recently did this by poking a thin wire down the hole. sometimes, the ******* at the bottom of the tank that the overflow pipes are attached to can corrode and become blocked as a result. again, these can be cleared with a pin / fine wire. hope this helps.

It is the sending unit, usually the veryable resister and arm. Remove and replace sending unit. It is , unfortunately, located inside of the fuel tank. To confirm gage operation reverse wiring to the guage and it will reverse the guage, confirming tha the gauge.is ok.

It's on the left hand side of the bike, attached to the oil pan, imagine that. Take oil cap off first so that oil will flow freely and faster. Before adding new oil filter (remove old one first) be sure to put some oil on gasket. Remember only hand tight so you don't kill yourself changing it the next time. Adios.

Try changing your spark plugs, I have recently had a similar problem with a CBR900, spark plugs seemed to be fine (held against frame outside of engine) but didn't actually work under compression, changed for new and bike now runs like a dream.

You can just replace the gas cap...However about the fuel guage fluctuates back and forth...thats due to the sending unit, which is located on the fuel pump itself

you probably have a loose connection from the sending unit or the unit it self inside the tank

your speedo is not sealed where it mounts as all of these items are triggered by the speedo also the thje gas gauge fogging is just typical has the tank or the guage units ever been changed? the solution is to pull the speedo and replace the o-ring that seals it from the outside elements as well as the seal that rests against the tank under the speedo