2003 Yamaha YZF-R1 "replace tail light socket 2004" Questions

...tail light should remain hot as long as the ignition switch is on. To find the rear brake light switch, find the metal brake line coming out of the rear brake master cylinder and going towards the ...

...tail light doesn't work. Every morning it is hit or miss. The lens cap has to be taken off and the light jiggled, they maybe. The bike has been to the shop and taken apart traced the wiring and still ...