I agree with Joe, I carry an extra lever but with my hand guards I probably don't need to. If I didn't have hand guards I'd use the Moose shorty levers, they don't stick out as far so there is a lesser chance of breaking them.
I broke my clutch lever one time. While sitting out "there", I was thinking "now what".
Though I don't recommend this for normal riding, I was able to shift without the clutch and made it back to the truck. When I got to a spot where I needed to be in neutral, I just turned the engine off, stopped, turned the key back on without starting, found neutral, started the engine back up, took aim of the direction I needed to head, dropped in 1st and off I went. I think you may get the idea. Main point is you can probably limp back without the lever if need be.
Brake lever is even easier, though I've not broken this one yet. Rear brake is nice to have eh!