Triumph 2012 Tiger 800 Service Manual page 301

Evaporative Control System - Engine Running
When the engine is running, engine vacuum is appl ied to the purge hose (4) from the throttle bodies.
At certain times, the ECM opens the purge valve. The vacuum applied to the purge hose (4) now begins to draw stored
vapour from the carbon filled area of the canister and returns it to the throttle bodies for burning in the engine.
In order to control the speed at which vapour is purged from the ca nister, the engine management system shuttles the
purge control valve between open and closed positions .
1. Breather hoses
2. Carbon filled canister
3. Purge valve <open under ECM control}
4. Purge hose to throttle bodies
5. Fuel tank filler drain
SeNice Manual Tiger 800 and Tiger 800XC
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Fuel System/Engine Management
10. 123