Frame looks right for a DHZ, but not the swingarm... i may of course be wrong... wouldnt be the first time, just ask my missus...
The plug lead, leads me to believe DHZ, but the crappy oil cooler and swingarm styles says Atomik...
Flimsiness of the bash plate, budget rear shock, and cheapy tyres also lead me to think Atomik..
Looks like it has a battery box under the rear guard, but is a kickstart 140 (WTF??) and the forks are non-leading axle type... Atomik again...
But, the bar clamps are DHZ style...
Mate, this bike is most definately not new, new bikes dont have snapped guards, and those tyres dont look new...
This would be a wild guess, but i think you own an atomik 125 that's been re-engined... with a fancy sticker kit...