The first thing you need to know is that riding a Ural and sidecar is not like riding a standard two-wheeled motorbike. Not only have you got an extra wheel and the weight of the sidecar, but you will be riding on an unfamiliar surface (ice) and most bikes you ride these days aren't based on a 1940's design, like these babies are.
In short, they're heavy, clunky and pretty slow. Because we are using vintage Urals, they are rather prone to grinding to a spluttering halt when you least need them to. The spark plugs stop working, the wiring has been compared to a "Russian rat's nest", things snap in the cold, they stall and won't start again.... the list of potential ailments is endless.
As for speed, well don't expect to be driving at much more than 80 km/h. At warp speed, downhill, you might hit 95 km/h. But this doesn't feel that clever on ice. The brakes aren't too good either.
The addition of the sidecar makes driving this beastie a whole different ballgame. Go round a right hand corner too fast and you'll tip her over and your team mate in the side car will have their head snapped off. She may feel a bit strange the first time you ride her, but you'll soon get used to the weight and balance of the sidecar. You will have a few sessions to try her out before you set forth but if you can get used to riding with a side car somehow before you head to Russia it will make life easier.
Have a read of this Wired article by Wes Siler to get a feel for the rueful admiration you will come to have for this uniquely infuriating vehicle. His rather excellent conclusion is that,
"In short, the Ural isn’t a motorcycle, it isn’t an ATV and it isn’t a car. It’s a completely unique vehicle that requires as much time and effort to master as a motorcycle or automobile. It’s hard, but the effort is rewarded with an utterly unique experience on a machine that can do almost anything and go almost anywhere."