When was the last time you drained the PVC tubes on your 1500 GW bike . If you are asking what they are then you need to do it. Remove the lower left plastic on the 1500 gold wing the ones behind the shift lever , If you look you will see 2 plastic tubes with plugs on the ends . Get a pan place it under the bike and remove the plugs. and then put them back on them. They are full of ucky water.