Answering 9fingers's question first: when hot backing out the fine threads on the 8mm steel bolts risks pulling some of the RE's weak alloy aluminum threads along with them. And tightening the 8mm screws into the poorly toleranced aluminum threads when hot risks flexing them. The steel bolts aren't the problem -- they're well made. Its RE's aluminum castings and threading of same that's the problem.
Step back and look at RE's "most modern" engine oil filtration, drain and refill system.
Oil filter: five separate pieces (two filter O-rings; the filter; the cover O-ring; and the cover); three 8mm bolts under spring tension requiring extra care in starting alignment and bolt-to-bolt even tightening; located where oil drains on exhaust pipe; 4ftlb torque
Main drain: 19mm bolt with copper O-ring; easy to access under engine on center stand; 15ftlb torque
Secondary drain: five separate pieces (two 8mm bolts, the screen, the cover O-ring, and the cover); access under engine; 4ftlb torque
Tertiary drain: 12mm bolt with copper O-ring; access under engine; 8ftlb torque
And RE instructions say rock the motorcycle side-to-side to drain primary case, etc!
Refill requires removal of easy access cap except it has an interference fit with the alternator/CPS cable; requires use of small diameter funnel unless you don't mind oiling your exhaust pipe. Since you really don't know how much oil you didn't drain, you have to play sight glass games for the next two days to get the oil level correct.
Arizoni could have designed a one bolt, one filter with integral O-ring, and one cover system in a day and produced the technical data package in another two days.
No engineer on my team would have offered the RE design ... because they wouldn't have been on my team. It's truly that bad of a design, even for legacy considerations.
Returning to Brian, I don't know anything about Ural but wrenching on an RE is unique. Be careful in your assumptions because RE gets some things right but many more not-so-right. This forum can help you with the learning curve. But they're are a truly fun ride.