Definitely not built for off-road use but doable to some extent of course. I much rather spend that cash on a dirt bike, but that's just because I have a truck to haul it around.I'm sure you could, but I don't really think that is what the Z125 is for. If that is how you envision using the bike, there may be another brand that is better suited to you.
To use the Maxxis tires you'd use their 120/70-12 tire on both front and rear (they're not position-specific, so no issues there). Maxxis doesn't currently make a 100/90-12 tire in the M6024's.Nice! Will anything need to be changed to compensate for the larger tires?