Identify this bike, needs parts

[TacoTruck]

My worker bought this bike and it runs a bit rough. So he tore it apart and needs pistons, rings, and the kickstarter.

But it no longer has any identifier. Looks like a YZ, or a DT, or a IT, or a MX......

 

[SRAD97750]

What are the engine numbers?
Looks awesome.
-BIG DAN

 

[TacoTruck]

I'll take a look next week. I found a picture of a DT175 looks just like this. I don't know the year.