[shamster]

How important is it to always turn the fuel supply valve to off? Does it harm the bike if it has bee left on for a long period of time, when parked?

 

[Boldblood]

I was curious about this myself, since my "mentor" and others always told me to make a habit of turning it off whenever I turned off my bike.

But the owners manual only refers to turning off the fuel supply when preparing the bike for storage.

So, I no longer turn off my fuel supply.

 

[Oni]

It's vacuum operated. If it's in good working order it's fine to leave it in the "on" position. If it's not in good condition you'll know by the pool of gas beneath your bike.