How 'bout a 200ek diff on a 225?

[Sargon2112]

I searched a bit for this but did not find anything specific. I'm throwing around the idea of putting a YTM200ek diff on my 85 225DX. I live in the mountains and use the 225 for "mountain goating" around and it would be nice if she was geared a little lower... IF the swap is possible, how much would it gear the DX down? I'm not too concerned about top end on this trike anyway... that's what the 250R is for!

Any thoughts?