The spark plug gap for a 1999 H-D (Harley Davidson) is .032 to .036. The actual gap depends on the brand of spark plugs.
Plug gap for the Sportster 883 or 1200 should be .040
.028 to .035 according to spark plug brand.
.40mm is the recommended gap
.04
The proper air gap is .032 to .036 depending on spark plug brand.
The gap setting is 0.034 to 0.037.
35 on the gap gauge
Saw online the gap is .040
.038-.042
.040
.040".
The spark plug gap on a 1999 Suzuki Intruder 1500 is 0.035 inch. This is a common spark plug gap size for motorcycles.