Just thought I might join the conversation, and add a few interesting comments.
Although I think the CVT is a neat concept, it is very difficult to use on motorbikes for some reason. I have watched many try to adapt several different styles and brands to a Whizzer motorbike motor and they either self destructed, or any decent running motor whould put their "lights out". In fact the final production new edition Whizzers attached the GY6 scooter CVT drive to the motor, and every Whizzer I have would easily out pace them. I have friends that installed large [over 9 HP] motors on the late model Whizzer Ambassador and the comet drive worked well, but couldn't stay near my single speed Whizzer.
I did a lot of research into CVT drives and found they use a fair amount of power to operate and with a 49 CC 4-stroke at 2 HP , there isn't much to spare. It is important to transfer as much power as possible to the rear wheel. During the research I also found that wheel size has something to do with the operation of a CVT drive, as it seems to work better on small wheel [scotters, pocket rockets, etc] than larger wheels [bicycle, etc].
After riding several motorbikes with 2-speed drives [Whizzer Bi-Matic], I quickly noticed the major advantage of an extra speed on a motorbike. The power transfer is great, the system doesn't ask the motor for power to operate the drive, and provided quick take off speeds, and great motor RPM levels at cruising speeds.
No doubt, it will be expensive, and very few would sell because of American parts & labor cost. Sadly small production runs cost far more than standard production. When we have parts made the lowest quanity is 100, and most often much, much, larger minimums. When I first started the project I decided to build the 2-speed on top of the Q-Matic drive to take advantage of the current production parts to keep costs lower. The 2-speed simply adds a second clutch, pulley, second belt, additional primary drive pulley [or 2 groove version], longer shaft, and wider inner bearing bracket. Problem is the cost of second modifiied clutch, and small production runs of the brackets & belt guard.
We are considering a small "prototype" run of the Q-Matic II drive system for the group that want something "different" and maybe we can find a way to reduce production cost in the process.
Have fun,