Motorcycle
Motorcycle means any motor vehicle with a headlight, taillight, and stoplight and having: Two wheels, or Three wheels and a curb mass less than or equal to 793 kilograms (1749 pounds).
Source
40 CFR § 86.402-98
Scoping language
The definitions of 86.40278 apply to this subpart. The following definition in this section is applicable beginning with the 1998 model year: