Newbie on the sidecar and the Ural here but so far so good. Had my 2012 Ural Yamal for only about a month with 800 km on her with no problems. Vary easy to service with lots of good DIY information here and on Soviet Steeds and Canadian Ural/Dnepr Riders .
I think what RidingDonkeys posted above is right on.
Vince @ SWFL or WNC 2001 Kawasaki W650
2012 Dong Fang DF250RTB
2013 Sky Team ST125-8A 2013 Sky Team ST125-6B
2013 Ice Bear PBZ110-1P sidecar
2015 Ural cT