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The only advantage I see in that design is that you could manually modify the ratio. But the disadvantages are that now you have even more drag resistance. And when you pull on the lever to force the higher ratio it will cause a lot more drag. The CVT transmission is inefficient because it has a lot of drag, and slippage.
If you want to get the most out of a cvt, I highly recommend you get some flat weights, and new springs. I took a Chinese Tao Tao 50CC scooter and changed the cylinder out to 100cc. With the coil, cylinder head, pistion and cylinder, and 27 carb I was producing enough power to get that little scooter to about 68 mph, even with my 225lb butt on it. Of course thanks to the CVT, I ripped through a dozen v belts until I found the right spring, variator, weight combo.
Now you've got me thinking about my little scooter project, I only put about 30 miles on it after my mods, now it sits in the corner of my garage.
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