Not so sure that joining the tubes is a good idea!
If you did, then where does the air come from to to replace the fuel as it is taken from the tank?
You would end up having suction on both tubes connected to the tank, and no vent....could collapse the tank?
The charcoal canister actually has three nipples....one is the tank vent, one goes to the purge valve and then on to the throttle bodies...
But it also has an open air vent......
Cookie
I had to jettison a canister on one of my Suzukis because it became saturated.
I've only looked at the diagram in the shop manual for the RE. They all eventually saturate. I'm pretty sure that you don't need to remove the valve and the plumbing. In fact it appears that you can just send the vapor back for a second burn by just joining the tubes with a dowel without the smell filter. I've been eying that canister real-estate to store/ mount an air pump for flats.