Triumph TIGER Service Manual page 281

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When the engine is stationary any pressure increase in the fuel tank due to a rise in ambient temperature will cause the
fuel vapour to pass down the breather pipe A to a carbon filled canister which stores the vapour.
Once in the canister, vapour cannot return to the fuel tank because of a one-way valve in the canister.
Pipe A
Carbon Canister
1 0.1 26
Service Manual -Tiger
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