My daughter was riding it and it leaking oil in the drive chain area and on the chakm . Anyone run into this before ? Thanks

Automatic chain oiler gone wild?

Mike, could it be a KLX 110? Or is it the 125? I don't recall them making a 100.
Either way, it is most likely the countershaft seal located behind the chain drive sprocket/gear. It is installed from the outside, (good thing, so you don't have to pull the engine and split the center cases), but it may be difficult to remove the old one with the shaft in place.
Think of it like the gear selector shaft on your race car transmission, basically the same setup.
A couple of the higher-end tool suppliers like Snap-On and possibly KD used to sell a hollow extraction tool that was like a small section of pipe, threaded on the outside, made for removing the selector shaft seals on transmissions with the shaft installed. Not sure if they still do, but if you know someone with one of those it might do the trick.
Or better yet, since you'll need to buy a new seal, you could ask your Kawasaki parts guy if they have a tool for removing a countershaft seal, (or if they can get you one). It would probably be a universal tool, not specific to the KLX, I would imagine almost all dirt bikes from 80cc up to 250 or larger have the same countershaft diameter.
Just try to make sure that is where the leak is coming from, (behind the sprocket), and not the shifter shaft. Honestly, those seals usually last for many years, even on bikes that are raced & ridden hard. Also, if the leak began suddenly, and is more than just a seeping, slow leak, it could be a crack in the case. Especially if the bike was dropped hard on that side. Spray it down with brake cleaner, then put the bike on the stand or a milk crate, try to see where it is leaking from. It may not leak unless it is running in gear. The cases can often be repaired from the outside with epoxy if not in a high-stress structural area.

countershaft seal behind the sprocket, plugged vent, or possibly a damaged case half due to debris being thrown off of the chain or the chain itself came off at some point. Those are the usual culprits.

I don't remember if these have them but some of the MX bikes had an oil check plug in the area as well. If the check plug is supposed to have a copper washer on it and it's missing, that could be a source for a leak as well.