I am the guy who went crazy for CVTs, and I still love them.
I posted about how to mod them on Gopednation.
Here's a link to a search about the CVTs of Goped nation.
There are a million links I have made and others....
Page 2 and 3 of the search has a TON of info we've worked out.
http://www.gopednation.com/forum/search.php?searchid=1856725&pp=25
I've realized the easiest way to make it work on an MB
and figured I'd tell ya'll.
I share all my info because it's fun, and secrets about stupid stuff like this is silly.
All you have to do is get it CVT/motor assembly mounted (I'm going to do rack style)
and then modify the output sprocket on the CVT to accept a #219
or #35 clutch sprocket (just get the small clutch sprockets from a cart shop
and weld them onto the old splined sprocket coupler)
Then just get a large bottom sprocket for 219 or 35 chain(they go up to 100+teeth and only cost in the area of $20 a sprocket on Ebay)
and bolt the large sprocket to a brake disc rotor attached to the hub.
Done.
This will be the easiest way to get the gearing right without a jackshaft
or extra gear box.
Yes the China CVTs are ****, but they last a long time if you do a few mods.
I plan on doing it soon, but I just figure I'd throw out the easiest solution I've found. You see, I got a scoot that uses the 219 chain, and I've found there are lot of cheap new and used HUGE sprockets out there for it.
Good luck guys!
Oh, I forgot one thing...
I gave a lot of thought to adding a one way bearing on the output shaft,
and if it could be machined, it would make the CVT almost dragless for pedaling.
It does have a good amount of drag now for sure.