What you need to do is find your self a good Y8 block, and swap it out with that Y7.
If you dont rag your motor, that Y7 might still last a lil, see a minime is anything but a monster, mostly a waste of labor, I think.

Get that thing back to stock drive train, A nice cold air intake, stock exhaust, and some HK lowering springs, and enjoy the fact that you have a gas saver thats not too uber slow.

Gas prices are about to hit the fan, and and your gonna love the fact that with a y8 you can get 30mpg on the highway.