Gap the plugs .038" to .043" and torque the plugs to 22 ft/lbs.
The proper plug gap is 0.038-0.043 Mike
.040 in. RA8CH
.040, or 40 thousandths
.040 is rcommended gap .040
The proper air gap is .032 to .036 depending on spark plug brand.
100/90-19
If it's points or a Dyna S ignition you set the plugs at 28, other wise you set the plugs between 38 - 40
40
.038 to .043 for the 96cu. I alays run at .040 and no problems yet!
40 to 45. 40 is common.
the gap for a Harley plug on a 88c.i. is 30
This procedure is covered in detail in the proper manual for your model