Secondary Air Cleaner
Filter
It filters the fresh air drawn for re-burning to
prevent dirt or dust from affecting the operation of
the air injection cut-off valve.
Air Injection Cutoff Valve
Prevent exhaust muffler noise and backfiring at sudden deceleration.
The air injection cut-off valve usually opens to
lead air into the exhaust muffler in which air is reburned
to reduce CO.2 When the throttle valve
closes suddenly, the air injection cut-off valve is
actuated by vacuum to close and cut off secondary
air in order to prevent exhaust muffler backfiring
due to air in the exhaust system.
Reed Valve
Controls the secondary air inlet to reduce CO.2
When the motorcycle speed is less than 50km per
hour, the reed valve operates to draw secondary
air into the exhaust system for re-combustion.