Yamaha YFM80WP Owner's Manual page 269

1. Air intake restrictor plate
1. Cache réducteur d'air admis
1. Placa de restricción de admisión de aire
EBU01035
Air intake restrictor plate removal
q
To obtain full engine performance capability,
removing the air intake restrictor plate is
required.
NOTE:
Store the air intake restrictor plate with the
owner's manual so you can install it whenever
you want to reduce the top speed available.
8-33
1. Remove the air filter element. (See page
8-27 for removal and installation procedures.)
2. Remove the air intake restrictor plate.
3. Install the air filter element.