Honda CRF70F 2009 Owner's Manual page 148

Emission Control Systems
Problems that May Affect Motorcycle
Emissions
If you are aware of any of the following
symptoms, have the vehicle inspected and
repaired by your Honda Motorcycle Dealer:
1. Hard starting or stalling after starting
2. Rough idle
3. Misfiring or backfiring during acceleration
4. After-burning (backfiring)
5. Poor performance (driveability) and poor
fuel economy
Federal regulations prohibit removing or
disabling a device or element of design that
may affect your engine's emission
performance unless your motorcycle will be
used exclusively in competition. If you modify
your engine for use in sanctioned competition
events, you must deface or destroy the
emission control information label.
140
Technical Information
Fuel Permeation Emission Control System
This vehicle complies with the Fuel Permeation
Emission Control regulations of the U.S.
Environmental Protection Agency (EPA), the
California Air Resources Board (CARB), 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.