Anyone know what big bore cylinders work on the Madass

[Silent Matt]

I picked up a 2006 Madass, and was surprised how slow it is...
I'd like to throw a big bore jug on it, but not sure which type fits it.
I haven't found any answers searching for it.

Will this one fit? It says no machining necessary, but I've also read that the case does need to be opened up.
http://dratv.com/95cc.html

Or can I use one of the 70-88cc ones on ebay that say they fit Sachs 50 bee and 49er?

Any help is appreciated.