Originally Posted by DolphinJohn
Ok, #3 not #5. Still wondering what #21 is. There is no break in that hose from the canister back to the valve/tank.
Edit-- see the small in-line valve now over in the key, I must not have looked closely enough at the hose.
#21 is the Venting Valve. On Japanese bikes they call it a "Purge Valve". This is how I know gases move outward
from the tank at this location. The main thing you need to worry about is putting a rubber vacuum cap on the "Pressure Switch" inlet bung.