I saw a cool complete thread on after market throttles but I can't find it again to add my info for anyone considering a mountain bike or BMX bike brake lever as a throttle. I know it's been done before but FYI, the Tecktro one is a good choice because the threads are larger than most at 10mm (but the wrong pitch). I tapped the hole to a 10mm x 1.25 pitch thread (same as cables for mid year Kawis and adapters) and my cable threaded in well. Some of these levers have adjustable throw and most have adjustable resting position. You Yamaha guys probably have even more options if you don't use the adapter.