Interesting. They are supposed to have one coming out for Yamaha. The Honda one shows to be 125 bucks from them. Not cheap, but I have occasional joint pain and notice it in my thumb during all day riding. This might make all day and multi day trips more comfortable for some. It does not replace the thumb throttle but instead gives you another "trigger" style throttle option. Kinda neat. Their site is DXTrigger
https://youtu.be/QsvcHUbcScc