The starting enricher ("choke") on KLR carburetors, when activated, uncovers TWO orifices: One for fuel (pointy end of plunger withdrawn from hole in carb body); and one AIR PASSAGE (when the plunger is withdrawn, its larger diameter moves away from an air passage). The air and fuel now combined by the starting enricher system comprise a fuel-enriched mixture introduced to the engine through the carburetor venturi.
Since the starting enricher admits both fuel and air, the device functions as a sort of mini-carburetor.
I'll try to post an image from this website, where the starting enricher (and 'most everything else) is explained:
Here's the image; you can see the air representation (arrows descending), and the fuel indicated (entering horizontally, from the left) when the "choke" is activated, or, the enricher is open, one might say:
Using the starting enricher as an alternative throttle might do no more damage than perhaps foul somewhat the spark plug, and decrease fuel mileage.
In my experience, with a warm engine on idle (ca 1200 rpm), a mere slight opening of the enricher will kill it; YMMV.