First off I'd like to say I envy you. I can't afford to go again this year. Loved the Ukraine. The Speedway at Rivne is worth a visit. All I will say is make sure you get a tourist stamp in your passport, we got caught at the Russian border with the Ukraine officials saying we had the wrong stamp. Oh, and watch out for the cops, they will try it on.
"Transit is 3 days. You in Ukraine 5 days. Big problem. Wrong stamp, big problem"
We were asked to make a "present" to make the problem go away. We rang our biker friend in Rivne and that scared them enough to let us through to the Russian border.
But a fantastic country, the people are great and if some bikers find you you will have one hell of a time.