It looks like it's a common problem after Bren Tune, I've been told that something is wrong with my ECU , (I bought my bike brand new no one else had access to my ECU)spent two months sending back and forth my ECU , waisted 200$ on postage and resets with the dealer , and at the end got my messed up ECU back with a refund, Just for the flash not the postage of course, had to send my bike to the Dealer, they right away spotted the problem, and told me that they need to get new clean files from BMW mottared, and rewrite my ECU ($400) dealers time. So In total -$600 and three months of headache and down time