Hi Peter, A 3-way valve after the fuel pump is an allowed fuel shut off. It passes tech every time despite the fact it does not shut off the fuel at the tank, it just routes it around the system and back to the tank. It is not at the tank and it is allowed.
Seldom, I am not trying to argue in the face of common sense I am trying to get common sense defined to reflect changing designs. 7.B.2.5 allows for interpretation as is specifically for the fuel class, (anything except event gas). If the power is removed to EFI injectors the fuel is shut off from getting into the engine. It just flows back to the tank in the same way as it is already allowed. i.e. like a 3-way valve after the pump prevents fuel getting into the engine on constant flow. The difficulty is, how can you test/check this in tech? If you had an electric pump, you could see or feel it's not running, if you had mechanical pump, then if the engine is stopped the pump is stopped.
With respect to safety, if the bike is on fire, then stopping the fuel feeding the flames is a must. Stopping the pump, injectors, sparks etc all need to occur. A 3-way will not stop the fuel being pumped around your fuel system if you have a mechanical pump. You would need the clutch, assuming it's not a slider, to stop the motor turning.
It seems like I am just reiterating what I have said before with no meaningful discussion.
Can define why OFF solenoids cannot be defined as fuel shut-offs?
