Howdy, newby with 1981 kx1100?

Howdy,
tonight I scored a bike from sitting under some ugly trees for not much money. It was sitting outside since 2009.
Title says 1981 KX1100B
I think it is really a kz1100? It has the vetter fairing, shaft drive. jumped it, and starter does crank the engine over, and it has old oil in it.

looks like this, but flat black in places, and disgustingly dirty.
ericpetersautos.com/wp-content/uploads/2013/04/P1080029.jpg

actually, a link to the cl ad until he deletes it.

boise.craigslist.org/mcy/5575409249.html

KX would be a dirt bike. Probably a DMV typo, but I would check the numbers closely to make sure that title belongs to that bike.