A friend of mine totaled my '94 Tundra II LT yesterday, nailed a tree, and bent the frame really bad and broke a bunch of other stuff up front.

So he went on Facebook market place. He just dropped off a mint condition '91 Tundra II LT at my place, it doesn't look like it's ever been ridden, showroom condition.

Question; my research shows it's a 248cc whereas my '94 is a 268cc.
Can I swap out my 268cc from the wrecked machine directly into the '91?

I did not realize they put the 250cc motor in 90s Tundras, I thought it was phased out in the 80s. I can't answer your question but I know a lot of parts, like springs and suspension are interchangeable because I have done so.

Regardless you have a good friend.

Yes, i will not be and issue.

Thanks