Removing the Evaporative Canister?

Paul Bryant said:

I love seeing things cut open

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I like doing the cutting!

Super-cool to see, thanks for sharing, @Rocket3Pilot!

The highly recommended R/R:

Bad Voltage Regulator ...OR?

*****

The canister is a mechanism to meet the US anti-pollution laws, which contain restrictions on many substances, including volatile hydrocarbons.

By design, we use gasoline for fuel, the very volatility of which is fundamental to the running of the engine.

Trouble is, the gasoline doesn't know what is its purpose, and wants to evaporate all the time, whether the engine is running or not.

The canister system as installed on our American bikes (and many vehicles for that matter) has a vent line from the fuel tank as its input, and prevents gasoline at rest from venting into the atmosphere.

At ambient temperature, an equilibrium is achieved between the fuel vapor leaving the tank, and fuel vapor going back to the tank.

By design, when the engine is running, by some logic in the ECU, a valve is opened at the canister, to permit the collected vapor to run into throttle bodies and hence into the engine.

When removing the canister, one must allow the tank to vent to the atmosphere, and effectively plug the other lines.

Joesmoe said:

The canister is a mechanism to meet the US anti-pollution laws, which contain restrictions on many substances, including volatile hydrocarbons.

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And thank you SO MUCH for recommending it's use to Europe - Now part of Euro4 I believe.

Joesmoe said:

By design, when the engine is running, by some logic in the ECU, a valve is opened at the canister, to permit the collected vapor to run into throttle bodies and hence into the engine.

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I don't believe there's any connection to the ECU at all, or anything electrical like a solenoid. It's a very primitive poppet valve that simply opens by vacuum from the vacuum system and the vapors are then drawn into the throttle bodies and burned through combustion.

The problem with belief, is it is often shown incorrect by the facts.

ECU pin B09 in fact controls the valve that opens the canister to the vacuum lines - at least on a Touring. That connector hangs free on my bike, with the canister and valve removed.

Joesmoe said:

The problem with belief, is it is often shown incorrect by the facts.

ECU pin B09 in fact controls the valve that opens the canister to the vacuum lines - at least on a Touring. That connector hangs free on my bike, with the canister and valve removed.

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Correct - On my 2009 Standard too. The JPT plug to the EVAP has a return to the ECU pin and a switched power supply - I use the power supply to switch the PDM60 on and off.