There are 2 marks on the flywheel they are 4 degrees apart, on the center edge of the block hole is a mark. factory is 4 degree setting -if you moved it to 6 it wouldn't hurt.
Now 125 with a 45 low is a good winter jet, summer you might want 125, 42. Unless you have glass packs that 130 is way to rich - causing happy shifting. factory is 122/40 old factory 40/125
Your not saying if your needel [main]is shimmed, some may have 3 or 4 shims. ural put 1 shim in during the last 2 years. Richer jets make it sound like it runs better at idel and cold, but it hurts the hill climb and shift power.
happy shifting- unless you realy don't want to.
TEST EVERYTHING 1ST,2ND,3RD,recomend it 4TH. YES IM A URAL DEALER !!! !