2014 EC300 Supermoto Conversions

[3DKevin]

Just picked up this 2014 EC300 a couple days ago. I've wanted to build a street legal 2T to mess around with for awhile now; I was originally planning on going with a KTM or husky, but this deal was too good to turn down. Questions I have:

1.) Has anyone here done a supermoto conversion on this specific year/model?
2.) I know a 4.25" rim with a 140 will fit, is it possible to squeeze in a 5" rim with a 150?
3.) I've seen mentioned in some threads that husky wheelsets are identical to GasGas. For what years is this true?
4.) Gearing recommendations for street riding?

I know this bike will be extremely impractical, but it's a project idea I've had for quite some time. Any feedback or advice is appreciated, thanks!