Need help identifying a engine. I think it's off a tri-z.

[Boone]

Hi all,
I'm new to this forum and I have a question for ya all.
I got my hands on this engine and the guy thought it was from yamaha ti-z.
I'd like to figure out what it is.
It's definately a liquid cooled 2-stroke, single carb.
The cylinder has a 38W 246cm3 emboosed in it.
I can only read some of the serial # 003797.
It is also embossed with Y1 in other locations.
Any help would be greatly appreciated.
I do plan on parting it out or selling it whole,
I can send pictures if anybody is interested.
Can you also give me an idea on what it or some of the parts are worth? (If anything)
thanks
Boone

[J.D.]

If the ID Mark is "38W00", which it looks like it is, you have a YTZ250N engine. That's what my book says anyways.

[Tri-Z 490]

What are you looking to get for it? Does it run?