What is this? On my 1997 Monster 750

[teddy037.2]

w00t!


that's what we're here for

[ScottRNelson]

Why would someone remove the can? is there any benefit to that?

On a 1997 Monster, removing the charcoal cannister saves a pound or two but otherwise does nothing whatsoever to improve performance or looks.  Your bike will pollute the air a bit more if it's removed.

I left it on my Monster, when I used to have one, and they're still on the two Ducatis that I currently own as well.  When the bike is parked and goes through a heat cycle, gasoline expands a bit and the gasoline vapor goes into the charcoal cannister and is held there until you start the bike, at which point it is sucked back into the engine and properly burned.  When you don't have the cannister the gasoline vapor goes into the air.

You'll have to decide for yourself if it's good thing or not to remove pollution devices like that.  If I had a newer Monster with the cannister hanging off of the side of the bike I would probably remove the thing too, but not when it's out of sight like on the 1997 Monster.