States that require vehicle/motorcycle inspections could create an issue with these as well. Legally, a motorcycle or trike is considered a vehicle with 3 wheels or less within a specified weight range. An automobile is any vehicle with 4 wheels (within specified production parameters). Because there is such a HUGE shaded area with this sort of kit, most government and state entities rule in the favor that minimizes any sort of potential liability by deeming it "safe for road use" in their perspective territories.. This is becoming more and more commonplace as these are becoming more common.