Bion X bionX 250w 350w 48-52v controller problem. Repair or fail. So Iv replaced the fets with others o had and Iv fixed one problem and found another. The bike now will work as a normal bike where as before it just cogged all the time. Now it cogs when the power is turned on 🙁 still in the processor trying to fix it but it takes 4 hours to strip and re build this hub #pain in the ass.