It came really fast bolted right up with no problems
The Bike Master universal works better than the OEM. I use these on my XR100's XR50 and all my other pit bikes. I tried the OEM that was $60+ and these Bike Masters work so much better. They are shorter than stock.
The KTM 50SX Mini has hydraulic actuated disc brakes for the front and rear.
To help us to find the correct brake lever for your KTM 50 Mini, we will need to know the model year.