Honda NPS50/S RUCKUS 2009 Owner's Manual page 188

Emission Control Systems
Fuel Permeation Emission Control
System
This vehicle complies with the Fuel
Permeation Emission Control regulations
of the U.S. Environmental Protection
Agency (EPA) and Environment Canada
(EC). The fuel tank, fuel hoses, and fuel
vapor charge hoses used on this vehicle
incorporate fuel permeation control
technologies. Tampering with the fuel
tank, fuel hoses, or fuel vapor charge
hoses to reduce or defeat the effectiveness
of the fuel permeation technologies is
prohibited by federal regulations.
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Technical Information