Plug gap for the Sportster 883 or 1200 should be .040
.40mm is the recommended gap
The gap setting is 0.034 to 0.037.
.04
Saw online the gap is .040
35 on the gap gauge
.028 to .035 according to spark plug brand.
.038-.042
.040".
.040
Manual says .038 - .043
40 to 45. 40 is common.