thank you guys for the info
I changed the oil for the first time after 150 km (100 miles) and I put a little more than in the manual
I will soon put some pictures with the bike
Now it is stock and I run 2-3 miles on road until I reach the trails, so I will not change gearing for the moment.
I will soon try to make it dual sport (blinkers, mirror and a stoplight, a good skid plate) and then I will try to register it.
I am a begineer with this bike (I rode a DR 650 SE and I still have it) and it's powerful and really fun to ride, very light and agile.
I will do my best to ride it well and have fun.