Hi Mc!. Basically it's a plastic canister that is situated beneath the seat.
It's about the size of a large can of soup...and is mounted across the bike.
It's purpose is to reduce fuel evaporation emissions.
The CB has a 'sealed' fuel supply, the tank is not vented to the atmosphere.
Instead, it's coupled to the EVAP canister, (which is full of charcoal) and excess vapour from the tank is caught and 'stored' there until the bike is running.
The bikes ecu then opens a valve, and the vapour is drawn through and burnt with the normal intake gasses.
The pic shows canister removed.
I removed mine completely with no issues! you will need to find some inner hard pipe to rejoin, or tee pieces will work. Can’t believe the extra space!! I’ve also removed the outer rubber trumpets that sit under the airbox trim. Definitely more airflow moving into the box, and far more induction noise!
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