If you have a dealer handy, shouldn't be to hard to get parts for now, but they don't perform like a Deere or Ford or CaseIH.
A neighborhad a 93HP model, dynoed at 103, but when put to heavy work would not hold up. (He was useing one of those "Merry Crusher" brand tiller things). A 80 HP Ford would run the machine all day and not break a sweat. The problem was that the Belarus's torque peak was @ 1400 RPM, but the peak HP developed at 2200 RPM. Whe the tractor had to actually work the engine would slow down to the torque band, but didn't have enough power to keep running. In hard going it would stall, and it broke numorous PTO housings. He had to get rid of it.