Red. First you remove two tiny Phillips head screws, that are on the underside of the clutch lever perch. They retain the safety switch. Then take away the little switch assembly. After that you can safely remove the lever pivot bolt and jam nut that retains the clutch lever
I guess I should have added that if your new lever canít mount the switch then you will need to bypass the switch by adding a jumper wire between the contacts if you want to be able to start the bike in gear.
Be careful shorting or permanently opening the switch as it may have unexpected results!
The clutch switch and neutral switch are most likely linked to the ECU. They are used to stop you starting the bike in gear with clutch out, but, the ECU may alter the timing for easier starting and also apply a rev limiter as it will assume there is no load on the engine.
I don't know if this applies to the 390, but worth finding out before getting rid of the switch :-)
Also, if you purchase the genuine KTM PowerPart lever as Red has posted a picture of, it comes with an instruction sheet detailing the exact steps to remove and replace the lever in order to have success without needing any other replacement parts
This isnít my first rodeo, but it is the first one with real clowns...