CFR > Title 40 - Protection of Environment > CHAPTER I—ENVIRONMENTAL PROTECTION AGENCY > SUBCHAPTER C—AIR PROGRAMS (Parts 50–99) > PART 86—CONTROL OF EMISSIONS FROM NEW AND IN-USE HIGHWAY VEHICLES AND ENGINES > SUBPART F—Emission Regulations for 1978 and Later New Motorcycles; Test Procedures (§86.501-78 to §86.544-90) > 86.532-78—Vehicle preconditioning.

86.532-78—Vehicle preconditioning.

(a) The vehicle shall be moved to the test area and the following operations performed:
(1) The fuel tank(s) shall be drained through the provided fuel tank(s) drain(s) and charged with the specified test fuel, § 86.513, to half the tank(s) capacity.
(2) The vehicle shall be placed, either by being driven or pushed, on a dynamometer and operated through one Urban Dynamometer Driving Schedule test procedure (see § 86.515 and appendix I). The vehicle need not be cold, and may be used to set dynamometer horsepower.
(b) Within five (5) minutes of completion of preconditioning, the vehicle shall be removed from the dynamometer and may be driven or pushed to the soak area to be parked. The vehicle shall be stored for not less than the following times prior to the cold start exhaust test.
Hours
Class I 6
Class II 8
Class III 12
In no case shall the vehicle be stored for more than 36 hours prior to the cold start exhaust test.