Triumph Rocket III Service Manual page 293

Fuel System/Engine Management
~PIPEB
\
PURGE CONTROL VALVE
CANISTER PIPE C
\,-f
~
ROLL OVER VALVE
THROTTLE BODIES
Evaporative Control System - Engine Off
When the engine is switched off, hydrocarbon fuel vapour passes down the breather pipe A, through the roll-over
valve to the canister. Vapour is then stored in charcoal layers within the canister.
~PIPEA
Service Manual - Rocket
III
11.139