oEPA United States Environmental Protection Agency Office of Transportation and Air Quality EPA-420-B-16-016 March 2016 Highway Motorcycles: Exhaust Emission Standards Federal Year 1978-2005 2006+ 2006-2009 2010+ Class I II III l-Ab l-Bb II III (TieM) III (Tier 2) Engine Size (cc) 50-169 170-279 280+ <50 50-169 170-279 280+ 280+ HC (g/km) 5.0 1.0 1.0 1.0 - - HC + NOx (g/km) - - - 1.4° 1.4° 1.4° 1.4 0.8 CO (g/km) 12.0 12.0 12.0 12.0 12.0 12.0 Useful Life a 5/12,000 5/18,000 5/30,000 5/6,000 5/12,000 5/18,000 5/30,000 5/30,000 Warranty a 5/12,000 5/18,000 5/30,000 5/6,000 5/12,000 5/18,000 5/30,000 5/30,000 Notes: General applicability: These standards apply to 1978 and later model year, new gasoline-fueled motorcycles built after December 31, 1977, and to 1990 and later model year, new, methanol-fueled motorcycles built after December 31, 1989, and to 1997 and later model year, new, natural gas-fueled and liquefied petroleum gas-fueled motorcycles built after Decem- ber 31, 1996, and to 2006 and later model year new motor- cycles regardless of fuel. a Useful life and warranty period are expressed in years and kilometers, whichever comes first. b Starting with the 2006 model year EPA re-defined Class I to include motorcycles with engines smaller than 50 cubic centimeters. These new previously unregulated vehicles are Class I-A, and the pre-existing Class I became Class I-B. c This is an optional standard that allows manufacturers to average their emissions or transfer emission credits across classes. Code of Federal Regulations (CFR) citations: 40 CFR 86 Subpart F = Motorcycle emission test proce- dures 40 CFR 86.410-90 = Emission standards for MY 1990- 2005 40 CFR 86.410-2006 = Emission standards for MY 2006+.epa.gov/otaq/standards/light-duty/motorcycle ------- |