engine swap from a 95 model into a 91 model possible?

This is a picture of my current bike.

It came with a spare engine what I want to place in a 91 model .

will this fit? are there other problems?

I want to restore this 91 model but only if the engine will fit..

thanks...

 

generation three engine will not fit in a generation four bike and vise versa.

 

Straight across swap? Probably not. Possible? With some of the talent here, maybe.

 

Mmmm, sounds like a lot of problems to expect.

The risk it does not work is to great. I will let the bike go..

I will start working on my own to make it better. Starting with the buddyseat , brike lines...


Thanks all for the answers ..