The KLR has two safety switches, one on the kick stand and one on the clutch lever.
The potential problem is that crud may get into the switches causing them to fail, leaving you trail side with a bike that won't start. To get it going again you'll need to either perform a trail side bypass or fiddle with the switches until they work again, though they may repeat their failure a mile down the trail.
After doing these bypasses, you won't have that potential problem hanging over your head. Nevermore will you live in fear of a safety switch failure.
You'll also have the potential to start the bike in gear with the side stand down and have it topple over on you, trapping you under the pig with a broken leg while you await rescue, which may not come. You'll have to gnaw your leg off to free yourself.
It will also be possible for you to ride off with your side stand down and crash at the first left turn. Again, you may have to gnaw your leg off.
You've been warned sufficiently of the dangers, so here's how to do it.
First, the clutch.
Make yourself a piece like this from a short bit of 18 gauge wire. Alternatively, you can use a mini-fuse. Flash has some photos of this done with a fuse here
Stick it, or the mini-fuse, into the connector at the clutch lever.
Tuck the connector back into the socket.
Now, the side stand switch.
First, remove all that switchy/brackety stuff from the side stand. Unplug the switch cable from the plug that is up by the solenoid.
Make yourself a gizmo like this, using .110 female connectors.
Plug the gizmo into the connector.
Tuck the connector away and secure it to the frame with a small zip-tie.
Get in the habit of starting the bike in neutral and checking the side stand position before riding off. You know, like granddad hadda do. I think he called it a kick-stand...