One of the projects I had planned on performing was installing some diodes from the turn signal circuit to the Shift Light. This would flash the Shift Light when the turn signal was on and providing a bright reminder to you that your turn signal was on. From the drawing supplied by Yamaha, it looked possible. #53 in the drawing is the Multi-function meter we know as the combination Speedometer and Tachometer. The drawing identifies # 52 as the Shift Timing Indicator light. It looked like a wire harness existed between them. 

I started looking for the shift light indicator signal by entering the Setup mode. I entered the shift light brightness setup. While this was enabled, the shift light was glowing brightly. I probed the # 62 Meter Assembly 2  (display atop the faux tank) for a signal going to the shift light. I could not find it. I went ahead and dug into Multi-Function Meter # 53.  

It was quite a process to gain access to the Multi-Function Meter to even open it. When I finally had the Mutli-Function Meter # 53 (Tach/Speed/Shift) disassembled, I found the wiring going to the single LED for the Shift Light Indicator. After probing the LED and the Multi-Function Meters wiring for a signal, I found no individual shift signal originating from the Meter Assembly # 2. Only a very active digital communication signal.

After determining the Shift Light Indicator signal was derived locally, it was going to take disassembling the PCB and some soldering to go any further. At this point I opted out of making this modification. The bike is too new to be tearing into the meter. I can still install a jumbo LED on the bike or buy a turn signal auto-cancel. This mod would be too much work for anyone to easily perform. So now you know.