X-pro 125cc XB125D
 

My dad grabbed one of these for my son who has been wanting something a bit more like my Templar. He’s 9 so we got him something just a little bit big for him so he can grow into it. He’s loving the suicide clutch.
Got it put together and running in about an hour. Seems to be a great little bike except the fuel tank breather, we’ll, doesn’t breath and can cause fuel starvation.

So what is this make/model of bike analogous to? Are all the 125cc bikes pretty much the same? Honda clones? Fairly reliable machines or do they have issues?
I’m just hoping to get ahead of the curve on any issues that might come up so we’re prepared, but I don’t see any mention here of this make/model.

I can't find the model you wrote down, so I'm kinda assuming you have this one:
https://xprousa.com/collections/dirt...40258346746016

For the tank not venting, check the cap. There's a rubber diaphragm in there that should have either two holes, or a sort of valve in it. It may not have the holes punched out all the way, or the valve may be stuck. Check that.

Looking at it, it shares a chassis, and probably engines with Mototec. My son's e-start only mototec X1 had a bad stator out the box (which they aren't covering under warranty), so if the bike starts being weird after a while, do an electrical check.

How legit is this website? They have the best prices if the shipping is, indeed, free.

Looks like they call it the “bolt”
https://www.amazon.com/gp/aw/d/B08FB...b_b_asin_title
Legit, same company that sold me my Templar X 250.

So far, so good. Seems pretty solid.
Are these 125cc motors clones of something or original designs?
The bike seems to simple to kill lol.

Same company as Powersportsmax.com so reliable as they are.