I have been bonding with the tail lights on my CT 90 when at idle I get lights as expected but when I rev the engine my tail lights fade and nearly die. I took off the lens cover and noticed when I pushed the bulb in, it went dim. I wiggled the reflector dome and I would get a diminish light when I presided it down. Something must be shorting in the wiring through or behind the rubber grommet. I pressed the dome up installed the red lens and rode around the neighborhood in darkness and rain in my yellow jacket. The dimming returned. I'm going to take the tail light assembly apart tomorrow. The bulb works fine as does the brake light.