WD 40 isn't going to help. Did you do any work to the switch housing or throttle grips lately.
It sound like the throttle grip is in to tight on the TGS (Twist Grip Sensor) loosen the switch assembly a little and slide the throttle grip out about a 1/16 to a 1/8 of a inch then tighten everything down.
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
08 FLTR candy red sunglo,with 2015 103 HO, V&H Dresser Duals with Monster Rounds, Power Vision tuner, Willy Shiny Wheels and Forks and a bunch of other stuff.