I have had the X2 for about 2 months and last month the Bafang M600 clutch failed when riding over a techy section of trail and the pedal slipped. I ride in Florida so nothing crazy. The bike Luna X2 has 120 miles on it and is NON Ludi M600 Bafang. I opened a ticket with Luna but wanted to post the video of the slipping pedal. Had to remove the motor and ship it back to Luna for repair under warranty. I had to pay for the shipping back to Luna.