by mistico » Tue Jun 27, 2017 2:25 pm
Without knowing where you are located and what altitude, it's hard to recommend jetting or air screw settings(not that you asked for it)
This is what I suggest: Set the bike air screw according to the Beta owner's manual. It will list settings based on altitude. Assume jets are the default stock jets, but check them if you want to be sure. If the bike runs well, don't touch a thing. This is your first dirt bike. Try not to get hung up on jetting, a clicker here and there, or if you're 1-2psi off on tire pressure. You have way more important things to worry about before those become something that holds you back.
I'm running bone stock jetting on my 300 and I run it from sea level to about 7k feet without changing the jetting. Does it run a little rich when I go to high altitude? Of course. But not enough for me to want to tinker with it. It still hauls ass and runs well.