You can use them, but we STRONGLY reccomend that you do not.
They are made offshore, and are soooooooo loose, that your OEM hammers will be quieter, and perhaps more accurate as well.
S&S offers a 1.725 that we use with great confidence, when needed/required.
HILLLSIDE MOTORCYCLE & MACHINE
5225 S. Main St.
Munnsville, N.Y. 13409
"Repairing Broken Torque Curves for almost 3 Decades".