Modulators are legal in all fifty states. Below you will find the federal Mandate which makes modulators legal. No state can override the federal law, and therefore any motorcycle can modulate their headlights, provided they follow the federal guidelines. Kisan modulators meets or exceed the federal standards.
Federal Motor Vehicle Safety Standards
49 CFR Parts 571
[Docket No. 97-57; Notice 1]
Executive Order 12866
Motorcycle Headlamp Modulation System
s7.9.1 A headlamp on a motorcycle may be wired to either the upper or the
lower beam from its maximum intensity to a lesser intensity provided that:
(a) The rate of modulation shall be 240 +/- 40 cycles per minute.
(b) The headlamp shall be operated at maximum power for 50 to 70 percent of each
cycle
(c) The lowest intensity at any test point shall be not less than 17% of the
maximum intensity measured at the same point.
(d) The modulator switch shall be wired in the power feed of the beam filament
being modulated and not in the ground side of the circuit.
(e) Means shall be provided so that both the lower beam and the upper beam
remain operable in the event of a modulator failure.
(f) The system shall include a sensor mounted with the axis of its sensing
element perpendicular to the horizontal plane. Headlamp modulation shall cease
whenever the level of light . . . . less then 270 lux.
Partial reprint of:
Federal Registar: Feb. 21 1996 (Volume 61 No. 35)