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Discussion Starter · #1 ·
I just noticed my rear brake light does not activate when I use my front brake. It works fine with the rear brake.

Has anyone else had this issue?

It's a new bike with 200 Miles on it.

Thank you,
 

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There is a switch that is attached to the master cylinder, that is what activates the light. It could be loose or maybe faulty. Its still under warranty so just take it to the dealer to look at if you arent comfortable looking at it. The rear brake is activated differently. It is activated when you press down on the brake lever, a spring will pull down on a switch which activates the light.
 

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I bought my bike new and the dealer just didn't hook up the front brake light. I saw a loose wire under the seat plugged it in and the brake light started working.
 

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Check the two blade connectors on the switch for corrosion, and use a sharp knife to scrape off anything stuck on there. If that doesn't fix it, take the switch off the lever and you can pry open the front of the switch with a knife. Spray some WD-40 in there and then cycle the clicker switch a couple hundred times or so. Doing that got mine working again. The inside of the switch becomes pretty corroded over time, especially if the bike is outside a lot. If that doesn't work, find a motorcycle junkyard and grab a used one. Most every Kawasaki (and a few Suzukis) since the early 80's has used the same switch. If all you want to do is test if it's the switch or not, short the two wires going to the switch and the brake light should illuminate.
 

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Thank you to @CreatureCore, @Trider, and @ThagAnderson81for the information. My dad bought a Honda CBR250R Repsol Edition for him to have fun on, and for me to learn on as well. I was trying to figure out why the front brake lever wasn't triggering the brake light even though the rear brake pedal was. Seeing Trider's comment about the front brake light not being hooked up reminded me of a pair of blade connectors that I saw when I was taking pieces off of the bike in order to change the spark plug and, lo and behold, after I plugged the blade connectors in the brake light now illuminates when the brake lever is pulled.
 

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after I plugged the blade connectors in the brake light now illuminates when the brake lever is pulled.
Makes you wonder why they were not connected to begin with. Possible short that someone couldn't find? Hope not and it was just an oversight.
 
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