usually around 25-30 degrees cel. tryed getting my elevation from google earth and got 80ft, not sure if thats right. the 160 main feels good up top. sizing pilot jets is pretty new to me and 52 is the smallest i have now, ill have to play with my air screws and see if theres any difference, im at 2 turns out now. let me know how you make out, seems odd that were both getting hesitation with the diff size pilots. have you tried moving your needle clip?