yamaha ytm 200, 225, 250 motors

[tomucar1]

What are the differences in the yamaha 200, 225 and 250 motors used in the 80's.
I think the 225 has a slightly longer stroke? what parts are interchangeable.
I have a 1987 moto 4 200 that I think is at max oversize and was looking at the piston, cylinder and gasket kits for the 225 and 250 motors.
like to put a 250 cylinder on a 200 if possible.

[tomucar1]

I found a 225 engine and will install a 250 kit from e-bay as the top end is bad. This is going in my moto 4 200. I am also installing a 225 three wheeler rear end as the four wheeler is much slower.

[350for350]

The YTM225's had three bolt rims. You may be able to swap the hubs from your Moto four onto the trike axle.

[placek59]

do you happen to have a link to that 250 kit? I am thinking of upping my ytm200 when needed.

[350for350]

You will gain some from this swap, but from what I remember, the 200 had a shorter stroke than the 225/250 so you may not gain a lot. I did it on my 225, but the cylinder needed to be sleeved and the Timberwolf engine was free. It's only a 6cc increase in displacement. I'm not trying anyone from doing this, I'm just hoping that no one will expect a ton of power from doing it.